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Войти в исследования Sleep health · 2026
Is napping harmless? Nighttime sleep health and all-cause mortality in community-dwelling older Vietnamese adults.
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Chen Tuo-Yu, Le Thai Minh, Buxton Orfeu M, Vu Nguyen C, Saito Yasuhiko
Аннотация
OBJECTIVES: This study examined whether nap types (duration and regular vs. as-needed naps) were associated with mortality among older Vietnamese adults and whether nighttime sleep health moderated this association.
METHODS: Data were from the Longitudinal Study of Ageing and Health in Vietnam (2018-2023; n=4447; baseline mean age=69.74 years; 55.5% female). All-cause mortality at 4-year follow-up was the outcome. Self-reported napping included no nap (reference), regular short naps (<30 minutes), regular intermediate naps (30-59minutes), regular long naps (≥60 minutes), as-needed short naps, as-needed intermediate naps, and as-needed long naps. Poor nighttime sleep health was conceptualized using 4 SATED dimensions (sleep dissatisfaction, daytime sleepiness, sleep discontinuity, and suboptimal sleep duration).
RESULTS: At baseline, two-thirds of respondents took naps regularly or as-needed. There were 514 deaths at follow-up (12%). Adjusted logistic regression analysis showed that only regular long naps were associated with elevated death risk, adjusting for nighttime sleep health and covariates (OR=1.39, 95% CI=1.05-1.86). Early-mortality odds did not differ significantly between the other nap types and non-nappers. The interaction between as-needed long naps and poor nighttime sleep health was related to mortality (OR=1.32, 95% CI=1.01-1.72). The adjusted probability of death increased significantly with poorer nighttime sleep health for all nap types, except for regular long naps (which remained high regardless of nighttime sleep health) and regular short naps (which declined with poorer nighttime sleep health scores).
CONCLUSIONS: Despite the nap culture, taking long naps regularly was associated with higher mortality risks among older Vietnamese. Besides, the link between napping and mortality may be influenced by nighttime sleep health.
METHODS: Data were from the Longitudinal Study of Ageing and Health in Vietnam (2018-2023; n=4447; baseline mean age=69.74 years; 55.5% female). All-cause mortality at 4-year follow-up was the outcome. Self-reported napping included no nap (reference), regular short naps (<30 minutes), regular intermediate naps (30-59minutes), regular long naps (≥60 minutes), as-needed short naps, as-needed intermediate naps, and as-needed long naps. Poor nighttime sleep health was conceptualized using 4 SATED dimensions (sleep dissatisfaction, daytime sleepiness, sleep discontinuity, and suboptimal sleep duration).
RESULTS: At baseline, two-thirds of respondents took naps regularly or as-needed. There were 514 deaths at follow-up (12%). Adjusted logistic regression analysis showed that only regular long naps were associated with elevated death risk, adjusting for nighttime sleep health and covariates (OR=1.39, 95% CI=1.05-1.86). Early-mortality odds did not differ significantly between the other nap types and non-nappers. The interaction between as-needed long naps and poor nighttime sleep health was related to mortality (OR=1.32, 95% CI=1.01-1.72). The adjusted probability of death increased significantly with poorer nighttime sleep health for all nap types, except for regular long naps (which remained high regardless of nighttime sleep health) and regular short naps (which declined with poorer nighttime sleep health scores).
CONCLUSIONS: Despite the nap culture, taking long naps regularly was associated with higher mortality risks among older Vietnamese. Besides, the link between napping and mortality may be influenced by nighttime sleep health.