RESUMEN
BACKGROUND: Available screening tools for mild cognitive impairment (MCI), often a precursor to Alzheimer's disease, are insensitive or not feasible for administration in a busy primary care setting. Display Enhanced TEsting for Cognitive impairment and Traumatic brain injury (DETECT) addresses these issues by creating an immersive environment for the brief administration of neuropsychological (NP) measures. OBJECTIVE: The aim of this study was to determine if the DETECT cognitive subtests can identify MCI patients as accurately as standard pen and paper NP tests. METHODS: Twenty patients with MCI recruited from a memory disorders clinic and 20 age-matched controls were given both a full battery of NP tests (standard NP) and the DETECT screen. Logistic regression models were used to determine whether individual tests were predictive of group membership (MCI or control). Demographic variables including age, race, education and gender were adjusted as covariates. Selection methods were used to identify subset models that exhibited maximum discrimination between MCI patients and controls for both testing methods. RESULTS: Both the standard NP model (C-index = 0.836) and the DETECT model (C-index = 0.865) showed very good discrimination and were not significantly different (p = 0.7323). CONCLUSION: The DETECT system shows good agreement with standard NP tests and is capable of identifying elderly patients with cognitive impairment.
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Trastornos del Conocimiento/diagnóstico , Diagnóstico por Computador/instrumentación , Evaluación Geriátrica/métodos , Pruebas Neuropsicológicas , Anciano , Anciano de 80 o más Años , Estudios Transversales , Diagnóstico Precoz , Femenino , Humanos , Masculino , Estudios Prospectivos , Sensibilidad y Especificidad , Programas InformáticosRESUMEN
OBJECTIVE: The purpose of this study was to determine the effects of pregnancy and of maximal exercise on left ventricular diastolic filling response. STUDY DESIGN: Transmitral pulsed Doppler echocardiography was obtained in 10 healthy women during each trimester of pregnancy and at 12 weeks after delivery. Doppler studies were performed at rest and at each exercise workload. The P-R interval, the early and atrial peak flow velocities, the mitral early deceleration time, and the isovolumetric relaxation time were analyzed. Data are expressed as the mean and standard deviation of the mean. Values obtained during the last trimester of pregnancy were used as the pregnant value; values at the 12 weeks after delivery were used as the nonpregnant value. Paired t -test, analysis of variance, and mixed models were used to determine significance with a probability value of <.05. RESULTS: Pregnancy significantly increased the early and atrial peak flow velocities. Pregnancy decreased the P-R interval, the early deceleration time, and the isovolumetric relaxation time. Exercise significantly decreased these diastolic functions; but pregnancy, in any of the 3 trimesters, did not significantly affect this response. CONCLUSION: Pregnancy increased left ventricular diastolic camber stiffness at rest and shifted left ventricular diastolic filling during exercise from predominantly early to atrial filling. This finding suggests that there is an increase in left ventricular chamber stiffness during maximal upright bicycle exercise in pregnancy.
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Prueba de Esfuerzo , Ejercicio Físico/fisiología , Embarazo/fisiología , Función Ventricular Izquierda/fisiología , Adulto , Análisis de Varianza , Gasto Cardíaco , Diástole/fisiología , Ecocardiografía Doppler , Femenino , Pruebas de Función Cardíaca , Humanos , Periodo Posparto , Tercer Trimestre del Embarazo , Probabilidad , Valores de Referencia , Sensibilidad y EspecificidadRESUMEN
AIDS Clinical Trials Group (ACTG) 246/946 was a double-blinded, randomized, controlled trial of HIV-1 MN rgp160 ImmunoAG vaccine in HIV-infected patients with CD4(+) T cell counts >or=500 and 200-400/mm(3). The main objectives were to study the safety and immunogenicity of this vaccine and to study the persistence of the immune responses after vaccination over a longer period of time. Fifteen patients with CD4(+) T cell counts of >or=500/mm(3) were enrolled in the ACTG 246 study. ACTG 246 patients received a monthly injection of vaccine or control for 6 months and then injections every 2 months. After completion of this study, seven new patients with CD4(+) T cell counts of 200-400/mm(3) entered into the ACTG 946 study. These study patients received highly active antiretroviral therapy (HAART) (ritonavir, didanosine, and stavudine) for 9 weeks to stabilize their viral load and then each patient received a monthly injection of vaccine or control substance for 6 months with HAART. The study of these two relatively small populations showed that the vaccine was safe without any adverse effect both in the patients with CD4(+) T cell counts of >or=500 and 200-400/mm(3). The vaccine was also immunogenic in patients with CD4(+) T cell counts of >or=500/mm(3) as measured by gp160-specific lymphocyte proliferative responses, and it persisted after they had received more than six vaccine injections, for a longer period of time.
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Vacunas contra el SIDA/uso terapéutico , Proteínas gp160 de Envoltorio del VIH/uso terapéutico , Infecciones por VIH/terapia , VIH-1/inmunología , Vacunas Sintéticas/uso terapéutico , Vacunas contra el SIDA/efectos adversos , Vacunas contra el SIDA/inmunología , Animales , Recuento de Linfocito CD4 , Linfocitos T CD4-Positivos/inmunología , Chlorocebus aethiops , Seguridad de Productos para el Consumidor , Método Doble Ciego , Proteínas gp160 de Envoltorio del VIH/efectos adversos , Proteínas gp160 de Envoltorio del VIH/inmunología , Infecciones por VIH/prevención & control , Humanos , Proteínas Recombinantes de Fusión/efectos adversos , Proteínas Recombinantes de Fusión/inmunología , Proteínas Recombinantes de Fusión/uso terapéutico , Linfocitos T Citotóxicos/inmunología , Vacunación , Vacunas Sintéticas/efectos adversos , Vacunas Sintéticas/inmunología , Células VeroRESUMEN
OBJECTIVE: To determine prevalence of papillomatous digital dermatitis (PDD) among culled adult dairy and beef cattle in the southeastern United States. ANIMALS: 815 cattle examined during 4 visits to a slaughterhouse. PROCEDURE: The left hind foot of each animal was examined for gross lesions of PDD. Breed and sex of the animals were recorded. Lesions were examined histologically for pathologic changes and bacteria, especially spirochetes. RESULTS: 22 of 76 (29%) dairy cattle and 29 of 739 (4%) beef cattle had gross lesions of PDD. Detection of lesions was not associated with sex of dairy cattle, but male beef cattle were more likely to have lesions of PDD than were female beef cattle. Histologically, acute and chronic lesions were seen; the most severe changes were localized to the stratum corneum. Spirochetes were seen in lesions from 31 of 51 (61%) cattle. CONCLUSIONS AND CLINICAL RELEVANCE: Results suggest that PDD is common among culled adult cattle. Prevalence was higher in culled adult dairy cattle than in culled adult beef cattle.