Browsing by Author "Werneck, Andre O."

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    Agreement Between Self-Reported and Device-Based Sedentary Time among Eight Countries: Findings from the ELANS
    (2021) Ferrari, Gerson; Werneck, Andre O.; Silva, Danilo R.; Kovalskys, Irina; Gomez, Georgina; Rigotti, Attilio; Cortes, Lilia Yadira; Garcia, Martha Yepez; Liria, Maria; Herrera-Cuenca, Marianella; Zimberg, Iona Zalcman; Guajardo, Viviana; Pratt, Michael; Cristi-Montero, Carlos; Marques, Adilson; Peralta, Miguel; Bolados, Cristian Cofre; Leme, Ana Carolina B.; Rollo, Scott; Fisberg, Mauro
    The purpose of this study was to analyze the agreement between self-reported and device-based sedentary time among eight countries in Latin America. As part of the Latin American Study of Nutrition and Health (ELANS), data were collected from 2524 participants (18-65 years) across eight countries. Participants reported time spent sedentary in different activities (computer use at home, videogame use, reading, sitting down to chat with friends/relatives or listening to music, speaking on the phone, watching TV, and riding in a car). Overall sitting time was assessed using a single item from the International Physical Activity Questionnaire (IPAQ). Device-based sedentary time was assessed using Actigraph GT3X accelerometers. Self-reported overall sitting time (227.1 min/day) produced the lowest values of the three assessment methods, followed by self-reported sum of different types of sedentary behavior (364.1 min/day) and device-based sedentary time (568.6 min/day). Overall, correlation coefficients and ICC varied from weak to moderate (rho: 0.25-0.39; ICC: 0.21:0.39) between self-reported sum of different types of sedentary behavior, self-reported overall sitting time, and device-based sedentary time. The Bland-Altman plots indicated low to moderate agreement between self-reported overall sitting time and device-based sedentary time by sex. Self-report measures underestimate sedentary behavior and overall sitting time when compared with device-based measures. The weak and moderate level of agreement between methods indicates that caution is required when comparing associations between different self-report and device-based measures of sedentary behavior with health outcomes.
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    Perceived Urban Environment Attributes and Device-Measured Physical Activity in Latin America: An 8-Nation Study
    (2022) Ferrari, Gerson; Werneck, Andre O.; Silva, Danilo R.; Kovalskys, Irina; Gomez, Georgina; Rigotti, Attilio; Cortes, Lilia Y.; Yepez Garcia, Martha Cecilia; Liria-Dominguez, Maria R.; Herrera-Cuenca, Marianella; Pratt, Michael; Marques, Adilson; Van Dyck, Delfien; Leme, Ana Carolina B.; Fisberg, Mauro
    Introduction: Attributes of the neighborhood-built environment are associated with self-reported physical activity, but only a few studies have concentrated on device-measured physical activity in Latin America. This study examines the associations of perceived neighborhood-built environment attributes, device-measured sedentary time, and light-intensity and moderate-to-vigorous physical activity in adults from 8 Latin American countries.