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Table 2 Odds ratios for sleep class membership with and without adjustment for baseline psychiatric distress

From: Social class and gender patterning of insomnia symptoms and psychiatric distress: a 20-year prospective cohort study

  Model A: Predicting sleep Model B: Predicting sleep with adjustment for psychiatric distress
OR 95% CI OR 95% CI
Episodic maintenance class (ref: Healthy)
Female gender 0.85 (0.49-1.47) 0.81 (0.45-1.46)
Manual social class 1.60* (0.92-2.78) 1.55 (0.65-3.69)
GHQ (2+) at age 36    3.57** (1.82-7.02)
Social class and GHQ interaction    1.26 (0.31-5.10)
Developing class (ref: Healthy)
Female gender 4.20** (2.68-6.60) 4.02** (2.52-6.42)
Manual social class 1.86** (1.27-2.72) 1.73* (1.00-2.99)
GHQ (2+) at age 36    2.32** (1.26-4.28)
Social class and GHQ interaction    1.54 (0.40-5.97)
Chronic mixed class (ref: Healthy)
Female gender 1.36 (0.78-2.37) 1.14 (0.63-2.07)
Manual social class 3.34** (1.69-6.57) 0.98 (0.31-3.08)
GHQ (2+) at age 36    3.26** (1.43-7.45)
Social class and GHQ interaction    9.57** (2.55-35.95)
  1. *p < 0.1.
  2. **p < 0.05.