Table 1. Odds ratios with confidence intervals obtained from unadjusted and adjusted logistic models for PGIC improvement

	Unadjusted models, n = 223^a			Adjusted model, n = 154
Characteristic	OR	P	95% CI	OR	P	95% CI
Depression	1.05	0.732	0.79 to 1.39	1.06	0.756	0.74 to 1.51
Female	1.41	0.403	0.63 to 3.19	1.68	0.348	0.57 to 5.00
Age	0.99	0.514	0.97 to 1.02	0.99	0.437	0.95 to 1.02
Number of children	1.03	0.864	0.75 to 1.41	1.29	0.244	0.84 to 1.99
Educational level
High school (10–13 years)	0.98	0.968	0.37 to 2.60	1.46	0.554	0.42 to 5.05
Higher education institutions (>13 years)	1.33	0.567	0.50 to 3.57	1.94	0.299	0.55 to 6.83
Living alone	1.65	0.161	0.82 to 3.33	4.03	0.014	1.33 to 12.25
Long-term benefits (>12 months)	2.30	0.011	1.21 to 4.39	2.46	0.040	1.04 to 5.83
Full-time sick leave	1.57	0.271	0.70 to 3.48	1.72	0.379	0.51 to 5.73
Number of PPS symptoms	0.87	0.265	0.67 to 1.12	1.11	0.570	0.78 to 1.57

^aOwing to missing values, the number of observations varied between 173 and 223 in the unadjusted models. The adjusted model included all predictor variables from the unadjusted models. OR = odds ratio. PGIC = Patient Global Impression of Change. PPS = persistent physical symptoms.