Exposure to indoor light at night in relation to multiple dimensions of sleep health: Findings from the Sister Study.

View Abstract

STUDY OBJECTIVE

To examine the association between light at night (LAN) and multiple sleep health dimensions.

METHODS

Among 47,765 Sister Study participants, indoor LAN (TV on in the room, light(s) on in room, light from outside the room, nightlight, no light) and sleep dimensions were self-reported at baseline (2003-2009). We used Poisson regression with robust variance to estimate adjusted prevalence ratios (PR) and 95% confidence intervals (CI) for the cross-sectional associations between LAN and short sleep duration (<7 hours/night), insomnia symptoms (difficulty falling or staying asleep), frequent napping (≥3 naps/week), inconsistent sleep/wake time (differed day-to-day and week-to-week), sleep debt (≥2 hours between longest and shortest duration), recent sleep medication use, and a cumulative poor sleep score (≥3 poor sleep dimensions). Population attributable risks (PARs) were determined for any light exposure vs. none by race/ethnicity.

RESULTS

Compared to sleeping with no light in the bedroom, sleeping with a TV on was associated with a higher prevalence of most dimensions of poor sleep (e.g., short sleep duration: PR=1.38, 95% CI: 1.32-1.45; inconsistent sleep/wake time: PR=1.55, 95% CI: 1.44-1.66; sleep debt: PR=1.36, 95% CI: 1.29-1.44; poor sleep score: PR=1.58, 95% CI: 1.48-1.68). PARs tended to be higher for non-Hispanic Black women compared to non-Hispanic white women.

CONCLUSIONS

Sleeping with a TV on was associated with poor sleep health among U.S. women, and non-Hispanic Black women may be disproportionately burdened.

Investigators
Abbreviation
Sleep
Publication Date
2023-04-05
Pubmed ID
37018759
Medium
Print-Electronic
Full Title
Exposure to indoor light at night in relation to multiple dimensions of sleep health: Findings from the Sister Study.
Authors
Sweeney MR, Nichols HB, Jones RR, Olshan AF, Keil AP, Engel LS, James P, Sandler DP, White AJ, Jackson CL