56 Chapter 2 Table A10. Treatment minutes (natural logarithm)– alternative specifications No controls (1) Age and gender (2) Demographic controls (3) Age, gender and need (4) All controls (main specification) (5) Unadjusted mean (SD) 1st quintile 6.775 (1.068) Adjusted mean differences (95% CI) 2nd quintile -0.059 -0.042 -0.041 0.027 0.025 (-0.065, -0.053) (-0.048, -0.036) (-0.046, -0.035) (0.021, 0.033) (0.020, 0.031) 3rd quintile -0.065 -0.064 -0.063 0.032 0.028 (-0.071, -0.059) (-0.070, -0.058) (-0.069, -0.057) (0.026, 0.038) (0.022, 0.034) 4th quintile -0.083 -0.085 -0.085 0.032 0.026 (-0.089, -0.077) (-0.091, -0.079) (-0.092, -0.079) (0.026, 0.038) (0.020, 0.032) 5th quintile (Highest) -0.119 -0.116 -0.122 0.029 0.018 (-0.126, -0.113) (-0.123, -0.110) (-0.128, -0.115) (0.023, 0.035) (0.011, 0.024) Age, gender, starting month and year No Yes Yes Yes Yes Migration background, address postcode, No No Yes No Yes DSM-IV diagnosis No No No Yes Yes Initial GAF No No No Yes Yes Treatment minutes n.a. n.a. n.a. n.a. n.a. R2 0.002 0.034 0.049 0.115 0.128 Notes: The adjusted mean differences correspond to the coefficients from OLS regressions, estimated using robust standard errors in the whole population (N=951,530). 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) in the first column concerns 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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