Sleep disturbances, quality of life, and ethnicity: the Sleep Heart Health Study

J Clin Sleep Med. 2010 Apr 15;6(2):176-83.

Abstract

Study objectives: To compare health-related quality of life (HR-QOL) across subgroups defined by sleep disturbances and ethnicity.

Methods: Men (47%) and women (53%) Sleep Heart Health Study participants age 40 and older (N = 5237) underwent overnight polysomnography and completed self-report questionnaires on symptoms of sleep disturbances. The physical and mental composite scales (PCS and MCS) of the Medical Outcomes Study 36-item short form survey assessed HR-QOL and were compared to sleep data.

Results: Participants self-identified as Caucasian/White (n = 4482, 86%), African American/Black (n = 490, 9%), or Hispanic/Mexican American (n = 265, 5%). The prevalence of obstructive sleep apnea (OSA) was 17%, frequent snoring was 34%, difficulty initiating or maintaining sleep (DIMS; insomnia symptoms) was 30%, and excessive daytime sleepiness (EDS) was 25%. African American participants with frequent snoring, insomnia symptoms, or EDS had significantly poorer physical health compared to Caucasians (p < 0.001). Hispanics with frequent snoring, insomnia symptoms, or EDS had significantly poorer mental health than Caucasian participants (p <0.001). Neither PCS nor MCS scores differed significantly across ethnic subgroups for participants with moderate to severe OSA (respiratory disturbance index > 15, 4% desaturation).

Conclusions: Across ethnic/racial subgroups, sleep disturbances are associated with worse physical and better mental HR-QOL than the U.S. norm, but this relationship may be moderated by comorbid health conditions. This study replicates and extends prior research indicating differences among minority and non-minority participants and highlights the need for future studies of sleep disturbances with larger samples of minorities that control for comorbid health conditions.

Publication types

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

MeSH terms

  • African Americans / statistics & numerical data
  • Cohort Studies
  • Ethnic Groups / statistics & numerical data*
  • European Continental Ancestry Group / statistics & numerical data
  • Female
  • Health Status*
  • Heart Diseases / epidemiology
  • Hispanic Americans / statistics & numerical data
  • Humans
  • Longitudinal Studies
  • Male
  • Mental Health / statistics & numerical data
  • Middle Aged
  • Polysomnography / methods
  • Prevalence
  • Quality of Life*
  • Sleep Apnea, Obstructive / epidemiology
  • Sleep Initiation and Maintenance Disorders / epidemiology
  • Sleep Wake Disorders / epidemiology*
  • Snoring / epidemiology
  • Surveys and Questionnaires
  • United States / epidemiology