Exploring the construct of subjective @entity25 in XXXX with @entity22 .

@entity1 @entity308 @entity146 @entity148 @entity25 @entity22
OBJECTIVE: The construct of subjective @entity25 is poorly understood. One widely used measure of subjective @entity25 is the Pittsburgh Sleep Quality Index (PSQI). The role of @entity146 in the association between the PSQI and a prospective, sleep diary-derived @entity25 measure (SDSQ) was investigated plus the degree to which the PSQI may reflect mood states. METHOD: A sample of 211 @entity22 @entity1 (International Classification of @entity25 , Second Edition) divided by the presence or absence of a comorbid @entity146 (DSM-IV-TR) and recruited between January 2004 and February 2009, completed the PSQI (primary outcome) and 2 weeks of sleep diary monitoring. First, correlations between PSQI and SDSQ were compared; second, regression analyses were used to investigate whether the association between PSQI and SDSQ depends on diagnostic status; third, the differences in @entity25 between the groups, plus the contribution of @entity148 and @entity308 in explaining these differences, were explored. RESULTS: The correlation between PSQI and SDSQ was significant only in the nonpsychiatric group (P < .001). The association between PSQI and SDSQ was moderated by diagnostic status: it was weaker in @entity146 @entity1 (P = .047). @entity1 with @entity146 comorbidity scored significantly higher on the PSQI than those without (P < .001); this difference disappeared after controlling for @entity148 . There were no group differences for the SDSQ. CONCLUSIONS: The present findings suggest that (1) @entity146 @entity1 may be more biased in their retrospective @entity25 ratings, and (2) the PSQI total score may reflect sleep-related distress. The use of a prospective sleep diary measure in @entity1 with a @entity146 is recommended.
