Abstract
This study investigated the associations between total and domain-specific sedentary time with the risk of overweight in older adults. A cross-sectional study was conducted by administering computer-assisted telephone interviews to 1046 Taiwanese older adults (aged ≥65 years) residing in two regions in Taiwan in 2015. Odds ratios (ORs) and 95% confidence intervals (CIs) were calculated to examine the associations between self-reported total and six domain-specific sedentary times and body mass index status (calculating by self-reported height and weight) by using logistic regression analyses. The results showed that compared with older women in the lowest quartile of the total sedentary time, those in the highest quartile were 1.87 (95% CI: 1.10–3.21) times more likely to be overweight, after adjustment for potential confounders. The total sedentary time was stratified into six specific domains, and only watching television more than 2 h per day was positively associated with overweight (OR, 1.55; 95% CI: 1.08–2.25) in older women, whereas no other sedentary time domains were associated with the risk of overweight. No significant associations were observed in older men. Further studies using prospective designs are required to confirm the presently observed effects of total and domain-specific sedentary behavior on the health of older adults.
Highlights
Being overweight is linked to mortality worldwide and constitutes a major risk factor for adverse health outcomes [1]
The chi-squared test showed that older women were more likely to be unmarried, unemployed, have a lower educational level, live with family, and have sufficient leisure-time physical activity (LTPA)
Older men were observed to report a higher total sedentary time, time spent on computer use, socializing, and transport compared with older women
Summary
Being overweight is linked to mortality worldwide and constitutes a major risk factor for adverse health outcomes [1]. As in other countries worldwide [2], the prevalence of overweight is increasing among older Taiwanese adults, of whom nearly half (49.1%) are overweight [3]. A systematic review regarding sedentary behavior and health outcomes indicated that longer total sitting and television (TV). Previous studies have been limited to concurrently comparing the associations of both total and domain-specific sedentary time with the risk of overweight in older adults, even though examining domain-specific sedentary behavior (e.g., computer use, reading, socializing, and transportation) has been emphasized for developing tailored interventions [6]. Few studies have examined gender differences in the associations between sedentary behavior and overweight risk in older adults, especially in Asian countries.
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