Pittsburgh Sleep Quality Index (PSQI)

As psychiatric disorders are often associated with sleep disturbances, the PSQI was designed to evaluate overall sleep quality in these clinical populations. Each of the questionnaire’s 19 self-reported items belongs to one of seven subcategories: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction. Five additional questions rated by the respondent’s roommate or bed partner are included for clinical purposes and are not scored.