Patterns and correlates of sleep duration in the Southern cohort community study

Sleep Med. 2020 Nov;75:459-467. doi: 10.1016/j.sleep.2020.09.004. Epub 2020 Sep 10.


Objective: To investigate whether race (African American (AA) and white) is associated with sleep duration among adults from low socioeconomic (SES) strata and whether SES status, lifestyle behaviors, or health conditions are associated with sleep duration within race-sex groups.

Methods: This cross-sectional study includes 78,549 participants from the Southern Community Cohort Study (SCCS). Averaged daily sleep duration was assessed by weighted averages of self-reported sleep duration on weekdays and weekends. Adjusted odds ratios (ORs) of very short (<5 h/day), short (5-6 h/day), and long sleep (≥9 h/day) associated with pre-selected risk factors in each race-sex group were determined by multinomial logistic models.

Results: The prevalence of very short and short sleep was similar among AAs (6.2% and 29.1%) and whites (6.5% and 29.1%). Long sleep was considerably more prevalent among AAs (19.3%) than whites (13.0%). Very short sleep was associated with lower education and family income, with stronger associations among whites. Higher physical activity levels significantly decreased odds for both very short (OR = 0.80) and long sleep (OR = 0.78). Smoking, alcohol use, and dietary intake were not associated with sleep duration. Regardless of race or sex, very short, short, and long sleep were significantly associated with self-reported health conditions, especially depression (ORs were 2.06, 1.33, and 1.38, respectively).

Conclusions: Sleep duration patterns differed between AAs and whites from the underrepresented SCCS population with low SES. Sleep duration was associated with several socioeconomic, health behaviors, and health conditions depending on race and sex.

Keywords: Demographics; Health conditions; Risk behaviors; Sleep; Socio-economic status; Southern community cohort study.

Publication types

  • Research Support, N.I.H., Extramural

MeSH terms

  • Adult
  • African Americans*
  • Cohort Studies
  • Cross-Sectional Studies
  • European Continental Ancestry Group*
  • Humans
  • Sleep