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. 2024 Jan 23;24(1):280.
doi: 10.1186/s12889-024-17779-5.

Bedtime negative affect, sleep quality and subjective health in rural China

Jiyao Sun  1   2   3   4 , Nan Zhang  1   2 , Jackie Carter  2 , Bram Vanhoutte  1   2   5 , Jian Wang  6   7 , Tarani Chandola  8
Affiliations

Bedtime negative affect, sleep quality and subjective health in rural China

Jiyao Sun et al. BMC Public Health. .

Abstract

Background: The overall level of negative affect (NeA) has been linked to impaired health. However, whether the diurnal timing of NeA matters and whether the NeA-health relationship is mediated by sleep quality remain unclear.

Methods: Using a longitudinal dataset (2006, 2009 and 2014 waves) consisting of 1959 participants, we examined the within-person impact of both bedtime NeA and non-bedtime NeA measured by Day Reconstruction Method (DRM) on subjective health measured by Visual Analogue Scale (VAS), and the mediating effect of sleep quality on the NeA-health relationships by fixed effect models.

Results: Bedtime NeA predicted poorer health, while non-bedtime NeA was unrelated to health. The deleterious impact of bedtime NeA reduced and became non-significant after sleep quality was controlled for. Bedtime NeA also significantly predicted impaired sleep quality.

Conclusions: Bedtime NeA is a stronger predictor of poorer health than non-bedtime NeA, and the deleterious influence of bedtime NeA on health seems to operate through poor sleep quality. Therefore, interventions to reduce bedtime NeA could potentially improve subsequent sleep quality, thereby protecting people to some extent from impaired health status.

Keywords: Fixed effect; Health; Negative affect; Sleep quality; Subjective wellbeing.

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Conflict of interest statement

The authors declare no competing interests.

Figures

Fig. 1
Fig. 1
The path diagram for the mediating effect of sleep quality on the NeA-health relationship
See this image and copyright information in PMC

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