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Table 1 Baseline characteristics for the trial sample and nested qualitative study

From: Telephone cognitive behavioural therapy to prevent the development of chronic widespread pain: a qualitative study of patient perspectives and treatment acceptability

  Total Trial sample (n = 1002)  
  Trial participants not interviewed (n = 970) Nested qualitative study participants (n = 32) Difference (95% CI)
Age, years, mean (SD) 57.7 (14.4) 61.4 (12.8) 3.8 (−1.3–8.8)
Female, n (%) 570 (58.8) 19 (59.4) 0.6% (−1.7–1.8%)
Illness Behaviour, mean (SD) 9.8 (3.5) 10.3 (3.2) 0.5 (−0.8–1.7)
Somatic symptoms, any, n (%) 451 (46.5) 16 (50.0) 3.5% (−1.4–2.1%)
Sleep problems score, mean (SD) 10.2 (4.6) 10.2 (4.5) 0.0 (−1.6–1.7)
EQ 5D, mean (SD) 0.70 (0.19) 0.67 (0.11) −0.03 (− 0.09–0.04)
ICECAP, mean (SD) 0.85 (0.15) 0.83 (0.13) −0.02 (− 0.08–0.03)
GHQ, > = 2, n (%) 431 (44.9) 15 (46.9) 2.0% (− 15.6–20.0%)
Polysymptomatic distress, mean (SD) 7.1 (3.5) 8.2 (2.8) 1.0 (− 0.2–2.3)
  1. CI confidence interval, SD standard deviation, IQR inter-quartile range