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Resumen Objetivo: Medir la desigualdad en el uso de servicios de tamizaje en adultos de 20 a 59 años, a partir de las encuestas nacionales de salud y nutrición 2006 y 2012. Material y métodos: A partir de la selección de cinco indicadores de tamizaje en adultos (detección de diabetes, hipertensión y cánceres de mama, cérvicouterino y de próstata) se estimaron el índice de Kuznets, el índice de desigualdad de la pendiente y el índice de concentración de salud, considerando como indicadores sociales la escolaridad, etnicidad, desempleo, nivel socioeconómico y tipo de protección en salud. Resultados: Las coberturas de las cinco pruebas se incrementaron, sin embargo, la desigualdad observada disminuyó únicamente en las intervenciones en mujeres; en el caso de la detección de cáncer de próstata se incrementó. Conclusión: Si bien es importante monitorear el desempeño de los servicios curativos, persiste el reto de asegurar el acceso efectivo y equitativo a servicios de diagnóstico temprano.

Abstract Objective: To measure health inequality in the use of screening services in adults from 20 to 59 years of age from the 2006 and 2012 national health and nutrition surveys. Materials and methods: Considering the selection of five indicators of screening in adults (detection of diabetes, hypertension, breast cancer, cervical cancer and prostate cancer), the Kuznets index, the slope inequality index and the health concentration index were estimated. Considering as social indicators schooling, ethnicity, unemployment, socioeconomic level and type of health protection. Results: The coverage of the five tests increased, but the inequality observed only decreased in the interventions in women; and in the case of the detection of prostate cancer it was increased. Conclusions: While it is important to monitor the performance of curative services, the challenge remains to ensure effective and equitable access to early diagnosis services.

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OBJECTIVE: To measure health inequality in the use of screen-ing services in adults from 20 to 59 years of age from the 2006 and 2012 national health and nutrition surveys. MATERIALS AND METHODS: dults (detection of diabetes, hypertension, breast cancer, cervical cancer and prostate cancer), the Kuznets index, the slope inequality index and the health concentration index were estimated. Considering as social indicators schooling, ethnicity, unemployment, socioeconomic level and type of health protection. RESULTS: The coverage of the five tests increased, but the inequality observed only decreased in the interventions in women; and in the case of the detection of prostate cancer it was increased. CONCLUSIONS: While it is important to monitor the performance of curative services, the challenge remains to ensure effective and equitable access to early diagnosis services.

OBJETIVO: Medir la desigualdad en el uso de servicios de tamizaje en adultos de 20 a 59 años, a partir de las encuestas nacionales de salud y nutrición 2006 y 2012. MATERIAL Y MÉTODOS: A partir de la selección de cinco indicadores de tamizaje en adultos (detección de diabetes, hipertensión y cánceres de mama, cérvicouterino y de próstata) se estimaron el índice de Kuznets, el índice de desigualdad de la pendiente y el índice de concentración de salud, considerando como indicadores sociales la escolaridad, etnicidad, desempleo, nivel socioeconómico y tipo de protección en salud. RESULTADOS: Las coberturas de las cinco pruebas se incrementaron, sin embargo, la desigualdad observada disminuyó únicamente en las intervenciones en mujeres; en el caso de la detección de cáncer de próstata se incrementó. CONCLUSIONES: Si bien es importante monitorear el desempeño de los servicios curativos, persiste el reto de asegurar el acceso efectivo y equitativo a servicios de diagnóstico temprano.

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The influenza virus spreads rapidly through recurring seasonal outbreaks during the fall and winter. Our country has the Epidemiological Surveillance System for Influenza (SISVEFLU), in operation since 2006, which has records of 558 health units of Influenza. According to the information recorded in it, we can see that the 2010-2016 influenza seasons have a biannual behavior, and that in the 2010-2011, 2012-2013, and 2014-2015 seasons, the predominant viral subtype was A (H3N2), while in the 2011-2012, 2013-2014, and 2015-2016 seasons, the predominant subtype was A (H1N1) pdm09, which was associated with an increased number of influenza cases and deaths. It is expected that the 2016-2017 season will have predominance of subtype A (H3N2) and in 2017-2018 the expected will be subtype A (H1N1) pmd09. During the 2010-2016 seasons, 53.5% of cases of influenza were women; 77% had no history of vaccination, and 36% had one or more comorbidities. As for deaths, 55% was observed in males, 85% had not been vaccinated, and 71.5% had one or more comorbidities.

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Today in North America, 1 in every 3 children under the age of 18 is overweight or obese. These children are at risk of developing chronic illnesses that will affect their lifelong health and well-being. And this, in turn, affects prosperity and economic growth. In fact, across the globe, obesity siphons off approximately $2 trillion from the world economy every year. We recognize that the influences on child obesity in our countries are environmental, socio-economic and behavioral. And we know that the conditions necessary for healthy lives are not equally available to all. Some families, neighborhoods and communities cannot access affordable and nutritious foods and have fewer opportunities for regular physical activity. This is especially true in communities underserved by public transportation, fresh food outlets, recreation facilities and green spaces...

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OBJETIVO: Determinar la tendencia de mortalidad por cáncer en niños y adolescentes por nivel de marginación en México. MATERIAL Y MÉTODOS: La información se obtuvo de certificados de defunción (1990-2009); se calcularon tasas estandarizadas por edad. Se obtuvo el porcentaje promedio anual de cambio (AAPC) calculados con Joinpoint Regression del National Cancer Institute para evaluar la tendencia. RESULTADOS: La mortalidad por cáncer en niños y adolescentes incrementó: en niños fue de 0.87% hombres y 0.96% mujeres y 1.22% hombres y 0.63% mujeres en adolescentes. El patrón de neoplasias en niños fue leucemias -sistema nervioso- linfomas, y en adolescentes leucemias -huesos y articulaciones- linfomas. Los incrementos de la mortalidad correspondieron a alta y muy alta marginalidad. CONCLUSIÓN: El incremento de mortalidad correspondiente a los estados de alta y muy alta marginalidad puede explicarse en parte por un mejor registro. Se requieren estudios de sobrevida para evaluar mejor la efectividad de los tratamientos en el país.

OBJECTIVE: To determine childhood and adolescent cancer mortality by the level of marginalization in Mexico. MATERIALS AND METHODS: We used 1990-2009 death certificates estimating age-standardized rates. We calculated the Average Annual Percent Change (AAPC) using the Joinpoint Regression program available at the National Cancer Institute to assess tendency. RESULTS: Cancer mortality rates increased. AAPC were 0.87% male and 0.96% female children, and for adolescents were: males 1.22% and females 0.63%. The neoplasm pattern in infants was leukemia -central nervous system- lymphomas; and in adolescents it was leukemia -bone and articulation- lymphomas. The increase in cancer mortality corresponded to the high and highest marginated areas of each state. CONCLUSION: The increase in highly marginated areas may be partly explained by well-documented local registration of deaths. Further studies focusing on survival are required in order to better assess the effectiveness of cancer detection and medical treatment in our country.

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In recent decades, Mexico has come a long way in health care matters, which has influenced the standard of living of the population and the development of the country. However, much remains to be done and changes should happen faster. Some of the main challenges Mexico faces currently are presented in this document and include: the challenge of reducing poverty in order to improve the health status of society; the development of health services that affect the slowdown in the pace of evolution of demographic indicators, life expectancy at birth and infant mortality; the challenge of reducing inequality; the challenge of great infrastructure available in the country for health care and the limited performance obtained in terms of organization, management and financing; the challenge resulting from human resources training systems, both undergraduate and postgraduate; the challenge that relates to academic and scientific productivity; the challenge of diabetes as an example of a serious public health problem; and the challenge of ethical implications in the organization and administration of health services, specifically, the allocation of public resources to them.

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OBJECTIVE: To determine childhood and adolescent cancer mortality by the level of marginalization in Mexico. MATERIALS AND METHODS: We used 1990-2009 death certificates estimating age-standardized rates. We calculated the Average Annual Percent Change (AAPC) using the Joinpoint Regression program available at the National Cancer Institute to assess tendency. RESULTS: Cancer mortality rates increased. AAPC were 0.87% male and 0.96% female children, and for adolescents were: males 1.22% and females 0.63%. The neoplasm pattern in infants was leukemia -central nervous system- lymphomas; and in adolescents it was leukemia -bone and articulation- lymphomas. The increase in cancer mortality corresponded to the high and highest marginated areas of each state. CONCLUSION: The increase in highly marginated areas may be partly explained by well-documented local registration of deaths. Further studies focusing on survival are required in order to better assess the effectiveness of cancer detection and medical treatment in our country.

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Alcohol is commonly used among adolescents in Mexico. In a representative survey of Mexico's general population, 30% of the teenagers reported current drinking, whereas 8% incurred in binge drinking (5 or more drinks per occasion) at least once during the last year. In addition, 3% reported three or more alcohol dependence symptoms over the last 12 months. In this Mexican age group, alcohol consumption importantly contributes to the most frequent causes of morbidity and mortality (e.g. accidents, violence, homicides, suicide and risky behaviors). Data from a representative survey of adolescents attending middle and high school in Mexico City suggests that adolescents attending Mexico's schools run a high risk for alcohol problems. In this study, prevalence of lifetime and current drinking, and of current binge drinking (5 or more drinks per occasion) were, respectively, 65.8%, 35.2%, and 23.8%. These rates are substantially higher than those described in teenagers from Mexico's general population. Furthermore, although among Mexico's general population the prevalence of drinking has traditionally been higher among male than female adolescents, no gender differences in prevalence of alcohol consumption have been reported among Mexican middle and high school students. This suggests that female adolescents in Mexico's schools have become equally exposed to drinking as their male counterparts. Despite these trends, there is a paucity of studies examining drinking patterns and their respective correlates among Mexican adolescents attending post-elementary education. To our knowledge, in this population, there are no published prevalence estimates of Hazardous and Harmful Drinking (HHD). HHD is defined as a pattern of alcohol consumption conferring to the individual a greater risk for health problems, or frankly conducive to medical or psychological complications (e.g. accidents, victimization, violence, alcohol dependence, liver cirrhosis and/or other medical complications). The Alcohol Use Disorders Identification Test (AUDIT), developed by the World Health Organization, is currently the only instrument specifically designed to identify HHD. Although the AUDIT was initially validated only among adult patients in primary care settings, this instrument has consistently shown to be valid and reliable in detecting alcohol problems in different populations, such as the adolescent population in many countries around the world. Given the public health implications of estimating the frequency of HHD among adolescents attending high school in Mexico, and given the importance of elucidating the variables influencing this problem, we decided to conduct the analysis presented here. To our knowledge, this is the first report published in the international literature on the prevalence of HHD among adolescents attending high school in a Latin American country. Objective In the study described here, derived from a Universidad Nacional Autónoma de México (UNAM) project entitled <>, we aimed at examining the frequency and risk factors for HHD among Mexican high school students. More specifically, our objectives were: 1. to determine the past-year prevalence of HHD among high school freshmen; and 2. to examine, in this population, the effects of demographic and family variables in the likelihood of HHD. Subjects and methods This study was a cross-sectional survey conducted at the beginning of the school year during the registration period between September 1st and September 30th, 2005. In 2005, a total of 34000 students were accepted to initiate college at the nine UNAM college campuses located in the Mexico City metropolitan area. Of these, 28784 students (87.4 %) (age=14.8 [±2.5] years; 51.0% women) consented in answering the survey and provided complete data. Consequently, 521 6 students (12.6%) were excluded from the analysis due to a lack of consent, incomplete data or their absence at the time of registration. We used the AUDIT to examine past-year prevalence of HHD. This self-report instrument includes 10 items that examine frequency and intensity of drinking (items 1-3), presence of alcohol dependence symptoms (items 4-6), and negative consequences of drinking (items 7-10), yielding a maximum possible score of 40 points. Among adult patients in primary care settings, it has been accepted that an AUDIT score of 0-7 points reflects safe levels of alcohol consumption, whereas a score of 8 points or higher indicates the presence of Hazardous and/or Harmful Drinking. It has been described however, that among adolescents, an AUDIT score of 3 points or higher reliably identifies those students experiencing this problem. In the analysis presented here, we separately examined and reported prevalence estimates and correlates for HHD using both AUDIT's cut-off scores (≥3 and ≥8). The AUDIT was administered at the same time that a wellness screening survey that the UNAM Medical Services routinely administer to all registering high school freshmen at the beginning of the school year. Questions in the wellness survey pertained students' medical and dental health, family medical history, immunizations, and use of tobacco and other drugs. In addition, demographic and socioeconomic information was obtained from a questionnaire also routinely administered by the UNAM registrar's office. This questionnaire included 37 items inquiring about gender, age, employment and marital status, monthly family income, parental education, place and type of residency, persons with whom the student resided, and questions on previous academic performance. We estimated the prevalence of HHD and their respective 95% confidence intervals (95% CI) in the total of the sample, and separately by age group, gender, working status, monthly family income, parental education, and by variables reflecting whether the students lived with their family, peers, or alone. These variables were modeled using simulated binary terms (0, 1). Subsequently, a multinomial logistic regression was used to examine the relationship between HHD and the demographic and socioeconomic variables listed above. Variables were entered simultaneously into the logistic regression equation. To summarize the level of risk of HHD conferred by significant variables in the logistic regression model, odds ratios (OR) and their respective 95% CI's were estimated. All the significant effects reported here were adjusted considering the effects of the remaining demographic and socioeconomic variables. Results Among the high school students examined here, the prevalence of HHD was 4.0% when an AUDIT cut-off score of ≥ 8 was used. When an AUDIT score of ≥3 was considered, a frequency of 1 7.2% was observed. Men (AUDIT ≥8: 5.4%; AUDIT ≥3: 21.4%) experienced this problem more frequently than women (AUDIT≥8: 2.6%; AUDIT≥3: 13.1%). The highest prevalence of HHD among men was observed in all age groups and regardless of working status, family income, parents' education, or regardless of the persons with whom the student reported to live with. Controlling for demographic and socioeconomic differences between men and women, we found that the risk of experiencing HHD among men was approximately two times higher than among women (OR's and 95% CI's for AUDIT's cut-off score ≥8 or ≥3, respectively 2.0[1.6-2.4] and 1.6[1.5-1.8]).

De acuerdo a la Encuesta Nacional de Adicciones (ENA) (Medina-Mora et al., 2003), de 1990 al 2002, la prevalencia en el consumo de alcohol durante los últimos 12 meses entre los jóvenes mexicanos de 12 a 17 años de edad, se elevó del 27.6% al 30%. De manera más reciente, la Encuesta de Estudiantes de Nivel Medio y Medio Superior de la Ciudad de México (EENMMS) (Villatoro et al., 2003), describió que el consumo alguna vez en la vida y el consumo durante el último mes de bebidas etílicas afectó respectivamente al 65.8% y al 35.2% de los estudiantes. Llama la atención que la frecuencia del consumo alguna vez en la vida reportada por la EENMMS es considerablemente mayor que la descrita en los adolescentes de la población general urbana (39.8%) por la ENA. Además, las diferencias de género reportadas por la ENA, en las que los hombres tradicionalmente beben con más frecuencia que las mujeres, no fueron encontradas por la EENMMS en la población estudiantil del nivel medio y medio superior. Hasta lo que nosotros sabemos, se desconoce cuál es la prevalencia en esta población de patrones de consumo problemático de alcohol como serían el consumo riesgoso y dañino (CRDA) o el consumo dependiente. Por lo que se desconoce si existen diferencias entre la población estudiantil y los adolescentes de la población general, en la prevalencia de estos problemas. El CRDA se define como un patrón de consumo de bebidas embriagantes, que se sitúa en un continuum de severidad, que coloca al sujeto en riesgo de desarrollar problemas de salud y/o que puede desembocar en francas complicaciones físicas y/o psicológicas (accidentes, victimización, violencia, dependencia al alcohol, etc.). Objetivo En el estudio que se presenta aquí, nos propusimos: 1) estimar la prevalencia durante el último año del CRDA en los estudiantes de primer ingreso al nivel bachillerato de la UNAM, y 2) evaluar la influencia de las variables sociodemográficas y familiares en el riesgo para el CRDA. Material y métodos El diseño del estudio fue el de una encuesta transversal en los estudiantes del primer año del bachillerato en el sistema escolarizado de la UNAM. Se estudiaron a 28 784 estudiantes (87.4 % de la población total). Se utilizó el Alcohol Use Disorders Identification Test (AUDIT) -versión en español para detectar el CRDA en la población adolescente. En este análisis empleamos tanto los puntos de corte recomendados para evaluar el CRDA en adultos (AUDIT≥8) como el puntaje recomendado para la población adolescente (AUDIT≥3). Se utilizaron porcentajes, promedios y desviaciones estándar para el análisis de las variables demográficas, y pruebas de contraste de medias (análisis de varianza) y de proporciones ( χ²) de acuerdo a la variable. Se utilizó la regresión logística multinomial para examinar la asociación de las variables demográficas y familiares con el CRDA. Se calcularon los odds ratios (OR) con intervalo de confianza al 95% para resumir el nivel de riesgo de ser afectado por el CRDA. Resultados Cuando se usó la definición del CRDA para la población adulta, se encontró que 4.0% de los estudiantes lo presentaron, frente a 1 7.2% cuando se utilizó el puntaje del AUDIT recomendado para los adolescentes. El riesgo de experimentar el CRDA fue casi dos veces mayor en los hombres que en las mujeres.

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Background In Mexico, alcohol is the most widely used substance among young adults. Alcohol consumption in this age group contributes importantly to the most frequent causes of mortality and morbidity (e.g., accidents, violence, homicides, suicide and risky behaviors). Around the world, college or university attendance has emerged in the literature as a risk factor for drinking problems among young adults. In Mexico, data from the most recent National Survey on Addictions showed that lifetime and current drinking is experienced by more than half of the Mexicans attending college education. Despite this, in our country there is a paucity of epidemiological studies examining drinking behavior and correlates among those attending college. Findings in non-representative samples of students attending public and private universities in Mexico City suggest that, during the last two decades, there has been an increase in the frequency of lifetime and current drinking in this population. Additionally, these studies have shown that, in comparison to young adults of the same age in the general population, university students may experience a greater prevalence of lifetime and current alcohol drinking. Regarding the frequency of unhealthy drinking among Mexican college students, to our knowledge there are no prevalence estimates of hazardous or harmful drinking published. However, observations in non-random samples of university students in Mexico City suggested that at least one in three men and one in five women incurred in unhealthy drinking (e.g., ≥ 5 drinks per occasion or drinking to intoxication) at least once during the last month. Hazardous and harmful drinking is respectively defined by a pattern of alcohol consumption conferring a greater risk for health problems or that is frankly conducive to medical or psychological complications (e.g., accidents, victimization, violence, alcohol dependence, liver cirrhosis and/or other medical complications). The Alcohol Use Disorders Identification Test (AUDIT), developed by the World Health Organization, is currently the only instrument specifically designed to identify hazardous and harmful drinking. Although the AUDIT was initially validated among older adult patients in primary care settings, this instrument has consistently shown to be valid and reliable in detecting alcohol problems in different populations such as the college students in many countries around the world. Given the public health implications of estimating the frequency of hazardous and harmful drinking among college students in Mexico, and given the importance of elucidating the variables influencing this problem, we decided to conduct the present study. To our knowledge, this is the first report published in the international literature on the prevalence of hazardous and harmful drinking among college students in a Latin American country. Objective In the analysis described here, derived from the project entitled Early Identification and Treatment of Problem Drinkers at the National Autonomous University of Mexico (UNAM), our aim was to examine the frequency and risk factors for hazardous and harmful drinking among Mexican university students. More specifically, our objectives were: 1. To determine the past-year prevalence of hazardous and harmful drinking among UNAM college freshmen; and 2. To examine in this population the effects of demographic and family variables on the likelihood of hazardous and harmful drinking. Subjects and methods This study was a cross-sectional survey that was conducted at the beginning of the school year during the registration period between September 1st and September 30th, 2005. In 2005, a total of 34 000 students were accepted to initiate college at the nine UNAM college campuses located in the Mexico City metropolitan area. Of these, 24 921 (73.3%) students (age=18.7±4.3 years; 55.7% women) consented in answering the survey and provided complete data. Consequently, 9 079 students (26.7%) were excluded from the analysis due to lack of consent, incomplete data or due to their absence at the time of registration. We used the Alcohol Use Disorders Identification Test (AUDIT) to examine past-year prevalence of hazardous and harmful drinking. This self-report instrument includes 10 items that examine frequency and intensity of drinking (items 1-3), presence of alcohol dependence symptoms (items 4-6) and negative consequences of drinking (items 7-10), yielding a maximum possible score of 40 points. Among adult patients in primary care settings, it has been accepted that an AUDIT score of 0-7 points reflects safe levels of alcohol consumption, whereas a score of 8 points or greater indicates the presence of hazardous and harmful drinking. It has been described, however, that among college students, an AUDIT score of 6 points or greater reliably identifies those students experiencing this problem. In the analysis presented here, we separately examined and reported the prevalence estimates and correlates of hazardous and harmful drinking using both AUDIT cut-off scores (≥ 6 and ≥ 8). The AUDIT was administered at the same time as a wellness screening survey that the UNAM Medical Services routinely administer to all registering freshmen at the beginning of the school year. Questions in the wellness survey pertained students' medical and dental health, family medical history, immunizations, use of tobacco and other drugs. In addition, demographic and socioeconomic information was obtained from a questionnaire also routinely administered by the UNAM registrar's office. This questionnaire included 37 items inquiring about gender, age, employment and marital status, monthly family income, parental education, place and type of residency, persons with whom the student resided, and questions on previous academic performance.

Antecedentes En México, el alcohol es la sustancia potencialmente adictiva que se utiliza con mayor frecuencia por los adultos jóvenes. Información proveniente de la Encuesta Nacional de Adicciones más reciente muestra que más de 50% de los jóvenes entre los 18-29 años ha consumido bebidas alcohólicas al menos una vez durante el último mes. En la Ciudad de México se ha encontrado que más de la mitad de las mujeres y cerca de dos terceras partes de los hombres entre 18-29 años de edad consume regularmente bebidas alcohólicas. Durante los últimos años, el consumo de bebidas alcohólicas se ha venido incrementando importantemente entre los jóvenes mexicanos de ambos sexos en edad de recibir una educación superior. A nivel internacional, la bibliografía sugiere que la población estudiantil de los centros de educación superior es un grupo de mayor riesgo para el desarrollo de problemas por consumo de alcohol. En México, aunque se desconoce si los estudiantes de educación superior son un grupo de mayor riesgo para estos abusos, algunas encuestas y reportes sugieren que los problemas por consumo de alcohol tienen una importancia creciente. En cuanto al consumo de alcohol que excede los niveles seguros para la salud (≥2 bebidas estándar al día en las mujeres o ≥3 bebidas estándar al día en los hombres), el Observatorio Mexicano del Alcohol y Drogas describió que en el año 2002 el consumo de cinco o más copas por ocasión de consumo afecta a tres de cinco hombres y a una de cinco mujeres. Aunque problemas metodológicos y sesgos de selección potenciales en estas encuestas dificultan su interpretación, sus resultados sugieren que el consumo de alcohol, particularmente el consumo riesgoso y potencialmente dañino, es común entre los estudiantes universitarios de la Ciudad de México. El consumo riesgoso y dañino de alcohol (CRDA) se sitúa en un continuum de severidad y se define como un patrón de consumo de bebidas embriagantes que colocan al sujeto en riesgo de desarrollar problemas de salud y/o que desemboca en francas complicaciones físicas y/o psicológicas (accidentes, victimización, violencia, dependencia al alcohol, cirrosis hepática, etc.). De acuerdo a los reportes de la bibliografía internacional, este es el primer estudio publicado sobre la prevalencia de consumo peligroso y dañino de alcohol en estudiantes universitarios en América Latina. Objetivo En el trabajo que se presenta aquí, que forma parte del proyecto para la Identificación Temprana y Tratamiento Oportuno de bebedores con Consumo Excesivo de Alcohol en Estudiantes Universitarios de la UNAM, nos propusimos evaluar la prevalencia del CRDA durante el último año y examinar los factores de riesgo y protección respectivos en estudiantes de primer ingreso a la licenciatura de la Universidad Nacional Autónoma de México. De manera especifica, nos propusimos: 1) estimar la prevalencia del CRDA durante el último año en los estudiantes de primer ingreso a la licenciatura de la UNAM, y 2) evaluar en esta población la influencia de las variables sociodemográficas y familiares en el riesgo para el CRDA. Material y métodos Se trató de un estudio transversal en el que se estudiaron 24921 estudiantes del primer año de la licenciatura de la UNAM (edad=18.7±4.3 años; 55% mujeres). Para detectar aquellos estudiantes que en el último año incurrieron en el CRDA, se utilizó el instrumento de tamizaje Alcohol Use Disorder Identification Test (AUDIT). Se utilizó la regresión logística multinomial para examinar los efectos de las variables demográficas y sociofamiliares, así como para calcular Odds Ratios (OR) y sus respectivos intervalos de confianza al 95%. Este instrumento consiste de 10 preguntas que exploran la frecuencia e intensidad del consumo de bebidas alcohólicas. Con el objetivo de poder comparar nuestros hallazgos con los de otros investigadores, se examinaron y se reportan separadamente las prevalencias del CRDA con base en puntos de corte de 8 y de 6 en el AUDIT. Para el reporte de datos demográficos y puntajes del AUDIT, se utilizaron porcentajes, promedios y desviaciones estándar. Se emplearon las pruebas de contraste de medias (análisis de varianza) y de proporciones (χ2) dependiendo de la naturaleza de cada variable. Se calcularon las prevalencias del CRDA con sus respectivos intervalos de confianza al 95%. Resultados Usando un puntaje de corte en el AUDIT de ocho y de seis puntos, la prevalencia del CRDA durante el último año fue respectivamente de 11.1% y de 18.4%. Esta fue mayor en los hombres (AUDIT≥8: 17.3%; AUDIT≥6: 27.4%) que en las mujeres (AUDIT≥8: 6.2%; AUDIT≥6: 11.3%). Además del sexo masculino, aquellos estudiantes que trabajaban y que reportaron un mayor ingreso familiar mensual, tuvieron un mayor riesgo de experimentar el CRDA. En las mujeres, pero no en los hombres, un mayor nivel educativo tanto en el padre como en la madre también se relacionó con un incremento en el CRDA. Contrariamente, una mayor edad y el ser casado se asoció con una reducción en el riesgo del CRDA.

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BACKGROUND: Positron Emission Tomography (PET) is a non-invasive imaging diagnostic tool that allows the study of specific biochemical processes using labeled molecules that closely mimic endogenous molecules. The two radiopharmaceuticals used in our facility are 13N-Ammonia and 18F-2-deoxy-2 fluor D-glucose (18F-FDG). 18F-FDG is the most common radiopharmaceutical used both at our Unit as well as worldwide, as it allows the study of tumor activity, the heart's metabolic activity, distinguish viable from non-viable myocardium and assess cerebral metabolism, among others. OBJECTIVES: Describe the experience in the use of PET scan in our country in the fields of oncology, cardiology and neuropsychiatry. METHODS: We performed an observational, retrospective, cross-sectional, and descriptive study. RESULTS: We analyzed a total of 1,154 studies performed at the UNAM-PET-Cyclotron Unit belonging to the Faculty of Medicine at the National Autonomous University of Mexico (UNAM). From the studies, 72.1% (832) corresponded to oncology, whereas 18.5% (213) and 9.4% (109) belonged to cardiology and neuropsychiatry, respectively. CONCLUSIONS: The studies performed at the UNAM-PET-Cyclotron Unit places it as the site with the largest PET experience in our country.

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BACKGROUND: This article is an update of a similar study published in 1984 in which the frequency of cesarean sections practiced in four Mexico City hospitals from 1976 to 1983 was analyzed. OBJECTIVE: To assess the frequency of cesarean sections practiced in four Mexico City hospitals from 1995 to 2002. MATERIAL AND METHOD: Data from these same hospitals corresponding to the 1995-2002 period was again collected. RESULTS: The frequency of cesarean sections in those four health care centers exceeded by far the internationally accepted standards; this frequency shows an increase, and it now accounts for twice as many operations as the number of interventions originally recorded. In 1976, 10 out of every 68 pregnancies came to end vaginally. By 2002, the same ratio was 10 out of 27. CONCLUSIONS: It is urgent to reduce the frequency of such a practice, as well as to reorganize the obstetric services; furthermore, the corresponding modifications in the training of such medical specialists must be done.

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En este ensayo se revisan los conceptos de ética, bioética y deontología que con mayor frecuencia son aceptados. De igual forma se analiza la relación entre ética y medicina, así como algunas situaciones que generan dilemas éticos además de influir en la relación médico paciente, en el trabajo clínico del médico y en las decisiones que se toman tanto en el nivel individual como en el de las instituciones de salud. Se discuten también algunos factores que resultan de la relación entre la ética y la atención de la salud, en particular la necesidad de preservar y acrecentar la dimensión humana del trabajo médico. Se sostiene que para lograr lo anterior se deben superar tres retos fundamentales: vencer el reduccionismo en el análisis de los asuntos éticos médicos; saber manejar la incertidumbre en el trabajo médico; alcanzar niveles adecuados de equidad en la prestación de los servicios de atención a la salud.

In this essay, the concepts of ethics, bioethics, and professional ethics are reviewed. In addition, we analyzed the relationship between ethics and medicine, the conditions that can be source of ethical dilemmas, andthe influence of ethics in the doctor-patient relationship, in the clinical work of the physician, and in an individual and institutional process of decision- making. Some factors that result from the interrelationship between ethics and health care, in particular the need for preserving and increasing the human dimension in medical practice, are discussed. Finally, the idea is supported that to achieve the purpose previously mentioned, three challenges must to be overcome: to defeat reductionism in analysis of medical matters, to accept the uncertainty of medical work, and the attempt to reach adequate levels of equity in the development of health services.

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In this essay, the concepts of ethics, bioethics, and professional ethics are reviewed. In addition, we analyzed the relationship between ethics and medicine, the conditions that can be source of ethical dilemmas, and the influence of ethics in the doctor-patient relationship, in the clinical work of the physician, and in an individual and institutional process of decision-making. Some factors that result from the interrelationship between ethics and health care, in particular the need for preserving and increasing the human dimension in medical practice, are discussed. Finally, the idea is supported that to achieve the purpose previously mentioned, three challenges must to be overcome: to defeat reductionism in analysis of medical matters, to accept the uncertainty of medical work and the attempt to reach adequate levels of equity in the development of health services.

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The issue of how medical specialization does not represent a novelty is discussed. The authors also approach the question of how the advantages and shortcomings of medical care provided by both general practitioners and medical specialists have been equally addressed previously by the ancient Greek classics as well as by outstanding Mexican specialists more than 50 years ago. A short review is made of the main current demographic, social, and health-related conditions of Mexico's society and of the public health system built up in the last 60 years. Some relevant data pertaining to the number of physicians and medical specialists and their distribution Mexico's 32 states are presented. The paper also includes a short argumentation of views on medical education in Mexico, and sets forth aproposal regarding the professional profile of the general practitioner and its role within Mexico's health system, as well as the need to enhance and reconsider the role played by general physicians. Authors conclude that within a comprehensive medical assistance model, both general practitioners and medical specialists are required.

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Objetivo. Determinar la correlación entre consumo de bebidas alcohólicas y mortaliad por cirrosis hepática. Material y métodos. Se efectuó un análisis de correlación ecológica entre el conjunto de variables que integran el patrón de consumo de bebidas alcohólicas investigadas en la Encuesta Nacional de Adicciones en 1993 y la mortalidad por cirrosis hepática, en el periodo 1971-1993 en las ocho regiones en que fue dividido el país. Para determinar el nivel de correlación se utilizaron los coeficientes de correlación de Pearson y de Spearman. Resultados. Solamente se encontró correlación significativa con la prevalencia de bebedores de bebidas destiladas, pulque y cerveza; con esta última la correlación fue negativa. Conclusiones. Aunque se considera que el consumo de pulque es limitado, llama la atención su asociación con la mortalidad por cirrosis hepática. La correlación negativa con la cerveza se interpreta en el sentido de que el consumo de esta bebida no es buen indicador de alcoholismo. Los resultados, aunque sin ser definitivos, muestran la necesidad de efectuar una acción de intervención efectiva en las entidades federativas con exceso de consumo de bebidas destiladas y pulque

Objective. To determine the correlation between alcohol consumption and mortality from liver cirrhosis in Mexico. Material and methods. Analysis of the ecological correlation between the patterns of alcohol consumption determined by the National Addiction Survey in 1993 and mortality by liver cirrhosis, in the period between 19711993, in the eight regions in which the country was divided. To determine level of correlation,the Pearson and Spearman coefficients were calculated. Results. Significant correlations were only found with the prevalence of spirits and pulque drinkers; with beer drinkers the correlation was negative. Conclusions. The correlation with pulque is interesting, since pulque consumption is considered to be low scale in some rural areas.The negative correlation with beer may indicate that beer drinking is not a good indicator of alcoholism. Results, though limited to the possibilities of an ecological study, reveal the necessity of effective actions in the regions where spirits and pulque are consumed in excess. Introducción

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El dengue es una enfermedad viral transmitida por el Aedes aegypti que empieza a incorporarse dentro de la agenda de prioridades de atención en varios países de la región de América. La aparición de casos de dengue hemorrágico surge como una seria amenaza para la salud pública y requiere de la formulación de estrategias intensivas de vigilancia y control. El panorama de dengue en México brinda la oportunidad de analizar la emergencia de un problema de salud regional, al confluir los factores de riesgo involucrados en su generación sin que hasta la fecha se haya detectado una epidemia importante de dengue hemorrágico

Dengue fever is a viral disease transmitted by Aedes aegypti. It has been recently incorporated to the agenda of priorities in many countries in the Americas. The emergence of dengue hemorrhagic fever cases is becoming a public health threat and requires the implementation of intensive surveillance and control strategies. The epidemiological panorama of dengue in Mexico provides the opportunity to analyze a regional health problem and the risk factors involved in the genesis of hemorrhagic cases under a situation that has not reached epidemic proportions yet.

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