Table 3

ITS analysis (GEE, Poisson regression) assessing change in level and slope of depression-related or anxiety-related work disability (annual number of work disability months) among rehabilitative psychotherapy recipients by gender and age tertile

IRRStandard errorP value95% CI
Women (n=7968)
 Intercept1.320.030.001.26 to 1.39
 Change in level (immediate)0.790.030.000.74 to 0.84
 Change in slope (gradual)0.520.020.000.50 to 0.54
 Slope before intervention1.720.020.001.66 to 1.77
Men (n=2468)
 Intercept1.400.050.001.27 to 1.53
 Change in level (immediate)0.840.060.000.76 to 0.94
 Change in slope (gradual)0.510.040.000.47 to 0.55
 Slope before intervention1.760.030.001.66 to 1.87
Lowest age tertile (19–29 years) (n=3882)
 Intercept0.890.050.010.81 to 0.97
 Change in level (immediate)0.760.060.000.68 to 0.86
 Change in slope (gradual)0.550.040.000.51 to 0.59
 Slope before intervention1.720.030.001.62 to 1.82
Intermediate age tertile 2 (30–38 years) (n=3118)
 Intercept1. to 1.30
 Change in level (immediate)0.740.060.000.66 to 0.84
 Change in slope (gradual)0.540.040.000.50 to 0.58
 Slope before intervention1.680.030.001.59 to 1.78
Highest age tertile 3 (39–58 years) (n=3436)
 Intercept1.980.030.001.87 to 2.11
 Change in level (immediate)0.860.040.000.79 to 0.92
 Change in slope (gradual)0.490.030.000.46 to 0.52
 Slope before intervention1.760.020.001.69 to 1.83
  • Crude models.

  • GEE, generalised estimating equation; IRR, incidence rate ratio; ITS, interrupted time series.