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Table 1 Mean changes of endpoints at each follow-up to baseline and differences in average mean changes (effect estimates)

From: Shared decision-making in antihypertensive therapy: a cluster randomised controlled trial

Mean changes Intervention group Control group Difference in average means change from T0/T1 (intervention vs. control) Confidence interval Significance p
Number of GP practices 17 17 17 19 18 18    
Primary endpoints          
SDM-Q-9 T1-T0 T2-T0 T3-T0 T1-T0 T2-T0 T3-T0 T0   
 Valid N 320 287 256 337 272 246    
 Mean change −0.11 −2.875 −1.07 −4.06 −2.34 −3.69 3.1182 −2.3730; 8.6093 0.2029
 (SD) (21.45) (22.98) (21.50) (22.51) (20.73) (20.87)    
Systolic BP   T2-T1 T3-T1   T2-T1 T3-T1 T1   
 Valid N   414 381   376 337    
 Mean change in mmHg   0.59 0.43   −0.02 −0.81 1.7517 −0.1884; 3.6918 0.0430
 (SD)   (11.54) (12.08)   (10.60) (10.92)    
Secondary endpoints          
Diastolic BP   T2-T1 T3-T1   T2-T1 T3-T1 T1   
 Valid N   414 381   376 337    
 Mean change in mmHg   −0.20 −0.15   −0.15 −0.66 0.9377 −0.0381; 1.9134 0.0596
 (SD)   (6.74) (6.14)   (6.14) (5.86)    
CVR   T2-T1 T3-T1   T2-T1 T3-T1 T1   
 Valid N   294 282   255 212    
 Mean change in %   0.71 1.44   1.14 2.04 0.4891 −1.4307; 0.4526 0.3084
 (SD)   (5.43) (6.89)   (5.58) (8.50)    
MARS-D   T2-T1 T3-T1   T2-T1 T3-T1 T1   
 Valid N   360 320   313 287    
 Mean change   0.07 0.4   −0.3 −1.1 0.670 −0.3748; 1.7166 0.2084
 (SD)   (9.6) (10.7)   (6.9) (6.7)    
Knowledge T1-T0 T2-T0 T3-T0 T1-T0 T2-T0 T3-T0 T0   
 Valid N 446 402 363 428 369 330    
 Mean change 3.00 2.99 5.85 3.30 3.76 4.66 1.3267 −4.3272; 6.9806 0.6454
 (SD) (27.71) (28.56) (28.44) (30.00) (28.37) (24.49)    
  1. BP Blood Pressure, SDM-Q-9 Shared Decision Making-Questionnaire, CVR cardiovascular risk, MARS-D Medication Adherence Report Scale-German Version.