62 Chapter 2 Table A16. Income gradients in severity at baseline assessment, treatment intensity, functional improvement, and additional treatment record: 2011 to 2014 Disease severity at baseline assessment (1) Treatment minutes (2) Functional improvement (3) Additional treatment record (4) Unadjusted mean (SD) 1st quintile 5.581 (1.029) 6.739 (1.081) 0.257 (0.437) 0.368 (0.482) Adjusted mean differences (95% CI) 2nd quintile 0.149 0.025 0.061 -0.014 (0.143, 0.155) (0.019, 0.032) (0.058, 0.064) (-0.017, -0.011) 3rd quintile 0.221 0.026 0.104 -0.023 (0.215, 0.228) (0.020, 0.033) (0.101, 0.107) (-0.026, -0.020) 4th quintile 0.281 0.024 0.136 -0.031 (0.275, 0.288) (0.017, 0.031) (0.133, 0.139) (-0.034, -0.028) 5th quintile (Highest) 0.362 0.023 0.173 -0.032 (0.355, 0.369) (0.016, 0.030) (0.169, 0.176) (-0.035, -0.029) Covariates Yes Yes Yes Yes DSM-IV diagnosis Yes Yes Yes Yes Initial GAF n.a. Yes Yes Yes Treatment minutes n.a. n.a. Yes Yes R2 0.177 0.128 0.134 0.142 Notes: The adjusted mean differences correspond to the coefficients from ordinary least squares regressions, estimated using robust standard errors in the population for the years of 2011 to 2014 only (N=793,599). Covariates include gender, age, migration background, 2-digit address postcode and the year and month of record opening. The DSM-IV diagnosis includes dummies for each diagnosis category at the DSM-IV 3rd level and binary indicators for having either 2 or 3 or more concurrent diagnoses. Initial GAF (dummies for each category) and Treatment minutes in the first column concern the inclusion of these measures as controls for the subsequent outcomes models. Each GAF category corresponds to a 10-point interval in GAF score (e.g. GAF category 1 corresponds to 1-10 points, 2 to 11-20, …, 10 to 91-100). The average of the untransformed variable treatment minutes for the lowest income quintile equals 1 490 minutes. n.a. – non-applicable, GAF – Global Assessment of Functioning score; SD – standard deviation; CI – confidence interval
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