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

@article{Knutson2006StabilityOT,
  title={Stability of the Pittsburgh Sleep Quality Index and the Epworth Sleepiness Questionnaires over 1 year in early middle-aged adults: the CARDIA study.},
  author={Kristen L Knutson and Paul J. Rathouz and Lijing L Yan and K. -L. Liu and Diane S. Lauderdale},
  journal={Sleep},
  year={2006},
  volume={29 11},
  pages={1503-6}
}
STUDY OBJECTIVES 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. PARTICIPANTS More than 600 participants, aged 38 to 50 years, from the Chicago site of the Coronary Artery Risk Development in Young Adults (CARDIA) Study. METHODS The PSQI and ESS were completed twice, approximately 1 year apart, between 2003 and 2005. Seven PSQI 4-level… CONTINUE READING

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