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Stability of the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Questionnaires over 1 year in early middle-aged adults: the CARDIA study.

Publication ,  Journal Article
Knutson, KL; Rathouz, PJ; Yan, LL; Liu, K; Lauderdale, DS
Published in: Sleep
November 2006

To describe the stability of the Pittsburgh Sleep Quality Index (PSQI) and the Epworth Sleepiness Scale (ESS) scores over 1 year among a population-based sample of black and white early middle-aged adults.More than 600 participants, aged 38 to 50 years, from the Chicago site of the Coronary Artery Risk Development in Young Adults (CARDIA) Study.The PSQI and ESS were completed twice, approximately 1 year apart, between 2003 and 2005. Seven PSQI 4-level component scores, a global PSQI score, and the ESS scores were calculated. A PSQI global score greater than 5 was classified as poor quality sleep, and an ESS score greater than 10 was classified as high daytime sleepiness.The mean+/-SD PSQI score was 5.7+/-3.1 in Year 1 and 5.9+/-3.1 in Year 2. The mean ESS score was 7.4+/-4.3 in Year 1 and 7.2+/-4.2 in Year 2. The Pearson correlation coefficient for the PSQI score in both years in the full sample was .68 and ranged from .54 among black men to .72 among black women. The Pearson correlation coefficient for the ESS score in both years in the full sample was .76 and ranged from .70 among black men to .80 among white men. In the full sample, 76% had the same PSQI dichotomous classification, and 85% had the same ESS dichotomous classification in both years.These results suggest that the PSQI and ESS are stable measures of sleep quality and sleepiness over the past year in early middle-aged adults.

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Published In

Sleep

DOI

EISSN

1550-9109

ISSN

0161-8105

Publication Date

November 2006

Volume

29

Issue

11

Start / End Page

1503 / 1506

Related Subject Headings

  • White People
  • Surveys and Questionnaires
  • Statistics as Topic
  • Sleep Wake Disorders
  • Risk Factors
  • Reproducibility of Results
  • Prospective Studies
  • Neurology & Neurosurgery
  • Middle Aged
  • Male
 

Citation

APA
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ICMJE
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Knutson, K. L., Rathouz, P. J., Yan, L. L., Liu, K., & Lauderdale, D. S. (2006). Stability of the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Questionnaires over 1 year in early middle-aged adults: the CARDIA study. Sleep, 29(11), 1503–1506. https://doi.org/10.1093/sleep/29.11.1503
Knutson, Kristen L., Paul J. Rathouz, Lijing L. Yan, Kiang Liu, and Diane S. Lauderdale. “Stability of the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Questionnaires over 1 year in early middle-aged adults: the CARDIA study.Sleep 29, no. 11 (November 2006): 1503–6. https://doi.org/10.1093/sleep/29.11.1503.
Knutson, Kristen L., et al. “Stability of the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Questionnaires over 1 year in early middle-aged adults: the CARDIA study.Sleep, vol. 29, no. 11, Nov. 2006, pp. 1503–06. Epmc, doi:10.1093/sleep/29.11.1503.
Journal cover image

Published In

Sleep

DOI

EISSN

1550-9109

ISSN

0161-8105

Publication Date

November 2006

Volume

29

Issue

11

Start / End Page

1503 / 1506

Related Subject Headings

  • White People
  • Surveys and Questionnaires
  • Statistics as Topic
  • Sleep Wake Disorders
  • Risk Factors
  • Reproducibility of Results
  • Prospective Studies
  • Neurology & Neurosurgery
  • Middle Aged
  • Male