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Fig. 2 | Sleep Science and Practice

Fig. 2

From: Quality of life, depression, and productivity of city government employees in Japan: a comparison study using the Athens insomnia scale and insomnia severity index

Fig. 2

Receiver operating characteristic (ROC) analysis of the Athens Insomnia Scale (AIS) and Insomnia Severity Index (ISI) scores and poor QOL, depression, and poor work performance. Health-related quality of life (QOL) as assessed by the Short Form-8 Health Survey Questionnaire (SF-8) was summarized into the physical continuous summary (PCS) and mental continuous summary (MCS) scores. Work performance was assessed by the absolute presenteeism score using the World Health Organization Health and Work Performance Questionnaire (WHO-WPQ). The lowest tertile of the PCS, MCS, and absolute presenteeism scores were classified as poor physical QOL, poor mental QOL, and poor work productivity, respectively. A Patient Health Questionnaire-9 (PHQ-9) score ≥ 10 was classified as depression. The p values represent the pairwise comparisons for the ROC curves of the ISI and AIS

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