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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.