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Table 4 Percent of sub-scales of Pittsburgh Sleep Quality Index (n = 95)

From: Work stress and sleep disturbances among internship nursing students

PSQI sub scales Score Not during the past month (0) (%) Less than once a week (1) (%) Once or twice a week (2) (%) Three or more times a week (3) (%)
Subjective sleep quality   11.6 45.3 28.4 14.7
Sleep latency   20 33.7 29.5 16.8
Actual sleep duration   10.5 34.7 45.3 9.5
Habitual sleep efficiency   60 31.6 6.3 2.1
Sleep disturbances   2.1 62.1 35.8 0.00
Use of sleeping medication   70.5 16.8 9.5 3.2
Daytime dysfunction   16.8 37.9 27.4 17.9
Total   27.35 37.44 26.03 8.87