Variations in sleep duration and timing: weekday and seasonal variations in sleep are common in an analysis of 73 million nights from an objective sleep tracker.

ABSTRACT:

Study objectives

Irregular sleep is a major risk factor for adverse health. In a global sample with technology-enabled long-term objective sleep data spanning 3.5 years, we investigated variability in sleep duration and timing over weekdays, months, seasons, and years.

Methods

Registered users of an FDA-cleared under-mattress sleep sensor who had ≥28 nights of sleep recordings and averaged ≥4 nights per/week between January 2020 and September 2023 were included for analyses. Generalized nonlinear fixed effects models were used to assess associations between sleep duration and sleep timing with weekday, month, season, and year. Sub-group analyses were conducted by age, sex, and location.

Results

Data from 116 879 adults (90 333 males, 26 546 females) aged 49 ± 14 years

SUBMITTER: Scott H 

PROVIDER: S-EPMC12417015 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature