Skip to main content

Table 2 Descriptive statistics for the seven PSQI components and the PSQI global score (bold text) shown separately for cases with pain-related TMD and cases with pain-free TMD

From: Exploration of dimensionality and psychometric properties of the Pittsburgh Sleep Quality Index in cases with temporomandibular disorders

PSQI component [scale range] Cases with pain-related TMD Cases with pain-free TMD
(N = 496) (N = 113)
Mean (SD) % of 0 values Mean (SD) % of 0 values
1. Subjective sleep quality [0–3] 1.2 (0.8) 17.3 0.8 (0.7) 31.9
2. Sleep latency [0–3] 1.2 (1.0) 29.0 0.8 (0.8) 45.1
3. Sleep duration [0–3] 0.6 (0.9) 58.9 0.5 (0.7) 61.1
4. Habitual sleep efficiency [0–3] 1.3 (1.3) 44.8 1.0 (1.4) 61.1
5. Sleep disturbances [0–3] 1.5 (0.6) 2.2 1.1 (0.4) 1.8
6. Use of sleep medication [0–3] 0.7 (1.1) 65.1 0.2 (0.7) 86.7
7. Daytime dysfunction [0–3] 1.0 (0.7) 23.4 0.6 (0.6) 49.6
PSQI global score [0–21] 7.1 (4.0) 0.4 5.1 (3.1) 0.0