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Table 2 Descriptive statistics on the components of PSQI in cases

From: Sleep disturbances are associated with increased pain, disease activity, depression, and anxiety in ankylosing spondylitis: a case-control study

PSQI components score 0 1 2 3
Subjective sleep quality, n (%) 78 (24.8) 166 (52.9) 58 (18.5) 12 (3.8)
Sleep latency, n (%) 103 (32.8) 139 (44.3) 46 (14.6) 26 (8.3)
Sleep duration, n (%) 155 (49.4) 117 (37.3) 31 (9.9) 11 (3.5)
Habitual sleep efficiency, n (%) 136 (43.3) 98 (31.2) 41 (13.1) 39 (12.4)
Sleep disorders, n (%) 39 (12.4) 181 (57.6) 84 (26.8) 10 (3.2)
Use of sleep medications, n (%) 297 (94.6) 8 (2.5) 4 (1.3) 5 (1.6)
Daytime dysfunction, n (%) 35 (11.1) 98 (31.2) 109 (34.7) 72 (22.9)
  1. N = 314.