RESUMO
El objetivo del estudio fue llevar a cabo la validez concurrente del cuestionario WebCas para evaluar la actividad física (AF) en 140 estudiantes (10 a 16 años) divididos en cuatro grupos, instruidos para usar un acelerómetro y contestar el cuestionario WebCas diariamente, resultó en 213 días de monitoreo de AF. Los análisis estadísticos se realizaron utilizando la prueba U de Mann-Whitney, gráficos de dispersión (Bland y Altmann) y coeficientes de correlación. La correlación entre las mediciones de AF (WebCas) en comparación con las mediciones de acelerometria (un día) mostró correlación de baja intensidad (r = 0.22; p <0.001), moderado intensidad (r = 0,48; p <0,04), promedio de los tres días. Se observó mayor correlación para el promedio de AF de los 5 días (r = 0,67; p <0,01). El cuestionario WebCas presentó indicadores de validez satisfactorios. (AU)
The objective of the study was to carry out the concurrent validity of the WebCas questionnaire to evaluate physical activity (PA) in 140 students (10 to 16 years) divided into four groups, instructed to use an accelerometer and answer the WebCas questionnaire daily, which resulted in 213 days of PA monitoring. Statistical analyses were performed using the Mann-Whitney U-test, scatter plots (Bland and Altmann) and correlation coefficients. The correlation between PA (WebCas) measurements compared to acelerometry measurements (one day) showed low-intensity correlation (r = 0.22; p <0.001), moderate intensity (r = 0.48; p <0.04), an average of three days. Increased correlation was observed for the 5-day AF average (r = 0.67; p <0.01). The WebCas questionnaire presented satisfactory validity indicators. (AU)
Assuntos
Humanos , Masculino , Feminino , Criança , Adolescente , Educação Física e Treinamento , Atividade Motora , Acelerometria , Inquéritos e Questionários , Estudos TransversaisRESUMO
OBJECTIVE: In the Basque Country, two cases of COVID-19 were diagnosed on February 28 2020. On March 14, the Spanish Government established a state of alarm. Only cases confirmed by molecular biology (reverse-transcriptase polymerase chain reaction [RT-PCR]) were known. We launched a web-based surveillance tool to estimate the number of symptomatic cases of COVID-19 to contribute to Public Health decision-making. MATERIAL AND METHODS: We implemented an anonymous web questionnaire and disseminated it through online social media social. We collected epidemiological information about «time¼ (date of onset of symptoms), «place¼ (zip code), and «person¼ (gender, age). We compared cases detected by RT-PCR with the estimated cases, according to the case definition of the Ministry of Health. We calculated the questionnaire response rate and the cumulative incidence at 14days. RESULTS: Between March 19 and 26, 128,009 people answered the questionnaire (5.5% of the Basque population). Of these, 26,375 met the case definition (symptom prevalence of 21.4%). The estimated cases were almost six times more than COVID-19 positive RT-PCR. The estimated 14-day cumulative incidence was 578.3 per 100,000 population compared to RT-PCR positive cases, which was 139.6 per 100,000 population. CONCLUSIONS: This tool was useful in estimating the minimum number of symptomatic cases in the Basque Country, which could support Public Health actions.
