RESUMEN

There are limited data describing clinical patterns and match running performance (MRP) among players with COVID-19 infection before and after infection, particularly related to different predominant SARS-CoV-2 variants, as well as in comparison to uninfected players. This observational study was conducted during two consecutive soccer seasons in one professional club in Split, Croatia. There were four clusters of mild, self-limited, or asymptomatic infection characterised by low adherence to preventive measures. Infected players had significantly more symptoms (t-test = 3.24; p = 0.002), a longer period of physical inactivity (χ2 = 10.000; p = 0.006) and a longer period of self-assessment for achieving full fitness (χ2 = 6.744; p = 0.034) in the 2020-2021 season (Wuhan wild strain and Alpha variant) than in the 2021-2022 season (Omicron variant). It was also found that, despite the milder clinical presentation of the infection in the 2021-2022 season, the players had significantly more abnormal laboratory findings (χ2 = 9.069240; p = 0.002), although without clinical significance at the time of the study. As for the MRP, player performance in the 2021-2022 season was not negatively affected by the Omicron variant, while there was an improvement in MRP in scores for a sample of all players. The RTP protocol was correctly applied because it helped the athletes to recover their pre-infection physical capacities relatively quickly. This study advances the understanding that an optimally and individually planned RTP protocol is crucial for the MRP of infected players. Future research needs to replicate the findings of abnormal laboratory results and extend the study focusing on their potential long-term clinical significance.

Asunto(s)

COVID-19 , Fútbol , Humanos , SARS-CoV-2/genética , Croacia/epidemiología , COVID-19/epidemiología , COVID-19/diagnóstico , Estaciones del Año

RESUMEN

Within the last decade, childhood obesity has become a serious problem, especially during the COVID-19 pandemic. This research paper aimed to examine whether body mass index (BMI) was higher during the pandemic (2020-2022) than in the pre-pandemic period (2012/2013-2019) using trends related to sex, urban-rural area, and physical activity (PA). This study included data from physical examinations of an entire population of primary school children from Split-Dalmatia County (Croatia) over a period of 10 years. There were 103,804 students from the first, fifth, and eighth grades who participated in the analysis. During the pandemic, the BMI of all the students increased, except for eighth-grade girls. Generations of eighth graders have had significantly different BMIs throughout the past decade. We found that first graders were overweight and obese in urban areas, while in rural areas, this problem was experienced by upper grades. Girls were more overweight and obese in the first and eighth grades, but boys experienced this more in the fifth grade. Reduced PA influenced an increase in BMI in both sexes, especially in girls. During the pandemic, this situation became worse. This study could be useful to experts for the creation of new policies for Split-Dalmatia County and surrounding regions that are similar economically and culturally.

Asunto(s)

COVID-19 , Obesidad Infantil , Niño , Femenino , Masculino , Humanos , Índice de Masa Corporal , Estudios Retrospectivos , Pandemias , Croacia/epidemiología , Sobrepeso/epidemiología , Obesidad Infantil/epidemiología , COVID-19/epidemiología , Estudiantes , Instituciones Académicas

RESUMEN

The impact of the COVID-19 pandemic in sport has been the subject of numerous studies over the past two years. However, knowledge about the direct impact of COVID-19 infection on the performance of athletes is limited, and the importance of studies on this topic is crucial during the current pandemic era. This study aimed to evaluate the changes in the match running performance (MRP) of professional soccer players that occurred as a result of COVID-19 infection after fulfilling all of the prerequisites for a safe return to play (RTP). The participants were 47 professional soccer players from a team which competed in first Croatian division (21.6 years old on average) during the 2020/21 season. The total sample was divided into two subgroups based on the results of a PCR test for COVID-19, where 31 players tested positive (infected) and 16 tested negative. We observed the PCR test results (positive vs. negative PCR), the number of days needed to return to the team, number of days needed to RTP after quarantine and isolation, and MRP (10 variables measured by a global positioning system). The number of days where the infected players were not included in the team ranged from 7 to 51 (Median: 12). Significant pre- to post-COVID differences in MRP for infected players were only found for high-intensity accelerations and high-intensity decelerations (t-test = 2.11 and 2.13, respectively; p < 0.05, moderate effect size differences), with poorer performance in the post-COVID period. Since a decrease of the MRP as a result of COVID-19 infection was only noted in two variables, we can highlight appropriateness of the applied RTP. However, further adaptations and improvements of the RTP are needed with regard to high-intensity activities.

Asunto(s)

COVID-19 , Fútbol , Adulto , Humanos , Pandemias , Volver al Deporte , SARS-CoV-2 , Adulto Joven

RESUMEN

OBJECTIVE: The aim of the study was to investigate the effects of using low-dose mannitol (0.3 g kg(-1)) on the pulsatility index (PI) and minimum diastolic blood flow velocity (FV-min) of the middle cerebral artery in a traumatic brain injury (TBI). METHODS: Low-dose mannitol (0.3 g kg(-1)) was administered to a group of 20 patients with a TBI. Transcranial Doppler (TCD) ultrasonography was used to monitor the PI and FV-min. The study included patients with a diffuse traumatic brain injury and Glasgow coma score < 8. The initial TCD ultrasonography values were pathological (PI > 1.4 and FV-min < 20 cm s(-1)). TCD ultrasonography examinations were carried out before mannitol administration, immediately after administration and 1, 2 and 3 hours after the administration of mannitol. RESULTS: A one-way analysis of variance revealed significant changes in the PI (F = 8.392; p < 0.001) and FV-min (F = 8.291; p = 0.001) after the use of mannitol. CONCLUSIONS: Low-dose mannitol administration appears to be efficacious for improving the indicators of disturbed circulation in a TBI (FV-min increase, PI decrease). The maximum decrease in the PI was recorded 1 hour after the administration of mannitol and was 10.9% of the initial value. The maximum increase in the FV-min was recorded 1 hour after administration and was 29.7% of the initial value. These changes were significant ∼ 2 hours later.

Asunto(s)

Lesiones Encefálicas/tratamiento farmacológico , Manitol/administración & dosificación , Arteria Cerebral Media/efectos de los fármacos , Adulto , Anciano , Anciano de 80 o más Años , Velocidad del Flujo Sanguíneo/efectos de los fármacos , Presión Sanguínea/efectos de los fármacos , Lesiones Encefálicas/diagnóstico por imagen , Lesiones Encefálicas/fisiopatología , Relación Dosis-Respuesta a Droga , Femenino , Escala de Coma de Glasgow , Humanos , Masculino , Persona de Mediana Edad , Arteria Cerebral Media/fisiopatología , Flujo Pulsátil/efectos de los fármacos , Ultrasonografía Doppler Transcraneal

RESUMEN

BACKGROUND/AIMS: To clarify the influence of microvessel density (MVD), lymphangiogenesis (LVD), and vascular invasion on prognosis in lymph node-negative colon cancer. METHODOLOGY: We performed immunohistochemical analysis from 152 Duke's B colon carcinomas, CD34 and LYVE-1 antibodies. Carcinomas were graded as low or high grade. χ2 test was used to examine their relationships and correlations with clinicopathological parameters. Survival time was analyzed and the differences between groups were assessed. RESULTS: A statistically significantly correlation was found between increasing MVD with age >60 years, tumor size >4cm, and poor tumor differentiation (χ2=40.018, p<0.001). The increase in MVD was associated with shorter DFS (p<0.001) and shorter OS in patients with colon cancer (p<0.001). LVD was statistically significantly associated with increasing the number of newly created blood vessels (χ2=96.6, p<0.001), low degree of tumor differentiation (χ2=96.6, p<0.001), and vascular invasion (χ2=51.8, p<0.001) in colon cancer. Log rank analysis showed that positive staining for MVD and LVD, high histological grade, vascular invasion, male gender, and age >60 years were connected with shorter survival of patients with Dukes B colon cancer 45 vs. 100 months (p=0.016 to <0.001). CONCLUSIONS: Positive expression MVD and LVD was significantly correlation with survival time and with high tumor grade and vascular invasion in patients with Dukes B colon cancer. The correlation of MVD and LVD with vascular invasion in Dukes B colon cancer indicates the need for further confirmation as a possible predictive marker.

Asunto(s)

Neoplasias del Colon/irrigación sanguínea , Neoplasias del Colon/patología , Ganglios Linfáticos/patología , Linfangiogénesis , Vasos Linfáticos/patología , Microvasos/patología , Neovascularización Patológica , Adulto , Anciano , Biomarcadores de Tumor/análisis , Diferenciación Celular , Distribución de Chi-Cuadrado , Neoplasias del Colon/química , Neoplasias del Colon/mortalidad , Neoplasias del Colon/terapia , Supervivencia sin Enfermedad , Femenino , Humanos , Inmunohistoquímica , Estimación de Kaplan-Meier , Ganglios Linfáticos/química , Vasos Linfáticos/química , Masculino , Microvasos/química , Persona de Mediana Edad , Análisis Multivariante , Clasificación del Tumor , Invasividad Neoplásica , Molécula-1 de Adhesión Celular Endotelial de Plaqueta/análisis , Valor Predictivo de las Pruebas , Modelos de Riesgos Proporcionales , Medición de Riesgo , Factores de Riesgo , Factores de Tiempo , Resultado del Tratamiento , Carga Tumoral , Proteínas de Transporte Vesicular/análisis

RESUMEN

AIM: To identify genetic variants underlying six anthropometric traits: body height, body weight, body mass index, brachial circumference, waist circumference, and hip circumference, using a genome-wide association study. METHODS: The study was carried out in the isolated population of the island of Korcula, Croatia, with 898 adult examinees who participated in the larger DNA-based genetic epidemiological study in 2007. Anthropometric measurements followed standard internationally accepted procedures. Examinees were genotyped using HumanHap 370CNV chip by Illumina, with a genome-wide scan containing 316730 single nucleotide polymorphisms (SNP). RESULTS: A total of 11 SNPs were associated with the investigated traits at the level of P<10(-5), with one SNP (rs7792939 in gene zinc finger protein 498, ZNF498) associated with body weight, hip circumference, and brachial circumference (P=3.59-5.73 x 10(-6)), and another one (rs157350 in gene delta-sarcoglycan, SGCD) with both brachial and hip circumference (P=3.70-6.08 x 10(-6). Variants in CRIM1, a gene regulating delivery of bone morphogenetic proteins to the cell surface, and ITGA1, involved in the regulation of mesenchymal stem cell proliferation and cartilage production, were also associated with brachial circumference (P=7.82 and 9.68 x 10(-6), respectively) and represent interesting functional candidates. Other associations involved those between genes SEZ6L2 and MAX and waist circumference, XTP6 and brachial circumference, and AMPA1/GRIA1 and height. CONCLUSION: Although the study was underpowered for the reported associations to reach formal threshold of genome-wide significance under the assumption of independent multiple testing, the consistency of association between the 2 variants and a set of anthropometric traits makes CRIM1 and ITGA1 highly interesting for further replication and functional follow-up. Increased linkage disequilibrium between the used markers in an isolated population makes the formal significance threshold overly stringent, and changed allele frequencies in isolate population may contribute to identifying variants that would not be easily identified in large outbred populations.

Asunto(s)

Estatura/genética , Peso Corporal/genética , Estudio de Asociación del Genoma Completo , Croacia , Genotipo , Humanos , Polimorfismo de Nucleótido Simple , Relación Cintura-Cadera