Background: Multicenter studies from Europe and the United States have developed specifically standardized questionnaires for assessing and comparing sedentary behavior, but they cannot be directly applied for South American countries. The aim of this study was to assess the reliability and validity of the South American Youth Cardiovascular and Environmental (SAYCARE) sedentary behavior questionnaire. Methods: Children and adolescents from seven South American cities were involved in the test-retest reliability (children: n = 55; adolescents: n = 106) and concurrent validity (children: n = 93; adolescents: n = 94) studies. The SAYCARE sedentary behavior questionnaire was administered twice with two-week interval and the behaviors were parent-reported for children and self-reported for adolescents. Questions included time spent watching television, using a computer, playing console games, passive playing (only in children) and studying (only in adolescents) over the past week. Accelerometer was used for at least 3 days, including at least one weekend day. We compared values of sedentary time, using accelerometers, by quartiles of reported sedentary behavior time and their sum. Results: The reliability of sedentary behavior time was moderate for children (rho ≥0.45 and k ≥ 0.40) and adolescents (rho ≥0.30). Comparisons between the questionnaire and accelerometer showed a low overall agreement, with the questionnaire systematically underreporting sedentary time in children (at least, - 332.6 ± 138.5 min/day) and adolescents (at least, - 399.7 ± 105.0 min/day). Conclusion: The SAYCARE sedentary behavior questionnaire has acceptable reliability in children and adolescents. However, the findings of current study indicate that SAYCARE questionnaire is not surrogate of total sedentary time.
Bibliographical noteFunding Information:
The SAYCARE study design, data collection and analysis were supported by the Brazilian Government from National Counsel of Technological and Scientific Development (CNPq; proc. 471266/2013–2) and São Paulo State Government from São Paulo Research Foundation (FAPESP; proc. 2014/ 11468–6). The SAYCARE Study has also been co-funded by other agencies in other countries as follows: (i) Collaborative Projects Fund (R.D. N°501–2015-INSN-DG-OEA) granted by the Instituto Nacional de Salud del Niño, Lima, Perú.; (ii) Sustainability Strategy at the University of Antioquia 2014–2015, Research group of social and economic determinants of health and nutrition, and Demography and Health Research Group at the University of Antioquia, Medellin, Colombia, and Interuniversity Services Corporation (CIS) from UdeA; (iii) Secretary of University Extension and Student Welfare, University of Buenos Aires, Buenos Aires, Argentina; and (iv) European Regional Development Fund (MICINN-FEDER) to GENUD Research Group. In addition, SAYCARE study researchers were also supported for interpretation of data, and in writing the manuscript. Augusto César Ferreira De Moraes was awarded by Young Investigator grant from FAPESP (proc. 2017/20317–0 and 2019/02617–1). Marcus V. Nascimento-Ferreira received a postdoctoral scholarship from Programa Nacional de Pós-Doutorado/Capes (PNPD/CAPES) and a PhD Student Internships abroad scholarship from the National Counsel of Technological and Scientific Development (CNPq, proc. 200340/2015–8) and a Brazilian PhD Student scholarship from the São Paulo Research Foundation (FAPESP, proc.2016/18436–8 and 2017/11732–3). Clau-dia L M Forjaz received advanced scientist scholarship from National Counsel of Technological and Scientific Development (CNPq: proc. 304003/2014–0). Full Prof. Luis A. Moreno was given the scholarship of a visiting professor from São Paulo Research Foundation (FAPESP, proc. 2015/11406–3). Heráclito B Carvalho received a research grant from São Paulo Research Foundation (FAPESP, proc. 2014/11468–6) and an advanced scientist scholarship from National Counsel of Technological and Scientific Development (CNPq: proc. 300951/2015–9).
- Sedentary behavior