Validity of Two Retrospective Questionnaire Versions of the Consensus Sleep Diary: The Whole Week and Split Week Self-Assessment of Sleep Surveys
The Whole Week Self-Assessment of Sleep Survey (SASS) and Split Week SASS (SASS-Y) are essentially retrospective questionnaire versions of a prospective sleep diary. Both have stronger correlations with sleep diary than the Pittsburgh Sleep Quality Index (Buysse et al., 1989). The SASS-Y has double the number of questions, but demonstrated stronger correlations with prospective sleep diaries and slightly less biased compared to SASS for TWAK, SOL, SE, and QUAL. However, the SASS resulted in slightly less bias for TST and WASO compared to SASS-Y.
Measures: SASS and SASS-Y