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Table 4 Hierarchical multiple regression models for predicting CBT outcome

From: Predicting the outcome of a cognitive-behavioral group training for patients with unexplained physical symptoms: a one-year follow-up study

  Immediate CBT outcomea   Short-term CBT outcomeb   Long-term CBT outcomec  
  b Standard error βI R2 b Standard error βI R2 b Standard error βI R2
Step 1             
Constant 13.10 4.10    9.09 3.72    14.88 4.38   
Control variables             
Physical Component Summary (SF-36: PCS) −0.27 0.08 -.34**   −0.19 0.08 -.26*   −0.22 0.08 -.27*  
Age −0.05 0.07 -.07   0.03 0.07 .04   −0.11 0.08 -.16  
Gender 2.33 2.02 .12   1.09 1.79 .06   2.66 2.11 .13  
Marital status 1.60 1.65 .10   −0.49 1.51 -.03   1.39 1.66 .09  
Employment −0.36 1.69 -.02   −0.16 1.51 -.01   1.26 1.73 .08  
Explained variance by control variables (R2)     .11     .07     .10
Step 2             
Constant −10.06 10.22    −12.36 8.24    0.87 10.57   
Control variables             
Physical Component Summary (SF-36: PCS) −0.16 0.09 -.20   −0.10 0.08 -.13   −0.15 0.09 -.19  
Age −0.01 0.07 -.02   0.04 0.06 .06   −0.10 0.08 -.14  
Gender 1.05 2.20 .05   0.92 1.89 .05   1.51 2.32 .07  
Marital status 1.85 1.65 .11   −0.42 1.42 -.03   1.25 1.66 .08  
Employment −0.53 1.68 -.03   −0.71 1.43 -.05   1.06 1.73 .06  
Predictors             
Global severity index (SCL-90) 0.06 0.03 .36*   0.06 0.02 .41**   0.06 0.03 .33*  
Personality-disorder characteristics (VKP) −0.08 0.09 -.11   −0.19 0.07 -.32*   −0.18 0.09 -.28*  
Psychiatric history (SCID) 0.72 1.50 .05   2.79 1.27 .20*   1.12 1.52 .07  
Mental Component Summary (SF-36: MCS) 0.20 0.09 .30*   0.21 0.07 .36**   0.10 0.09 .15  
Explained variance by predictors ( ΔR2)     .06     .15**     .06
  1. a Immediate CBT outcome was computed by subtracting the baseline PCS-score from the post-training PCS-score.
  2. b Short-term CBT outcome was computed by subtracting the baseline PCS-score from the three-months follow-up PCS-score.
  3. c Long-term CBT outcome was computed by subtracting the baseline PCS-score from the one-year follow-up PCS-score.
  4. I β is the standardized value of b.
  5. *p.05, **p.01, ***p.001.