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Table 3 Secondary outcome measures; number of participants contributed to the analysis (first row), mean change from baseline and difference between treatments with 95% confidence interval

From: Primum non nocere: shared informed decision making in low back pain – a pilot cluster randomised trial

Mean change from baseline

Mean treatment difference*

Decision support package

Usual care

Roland Morris disability questionnaire (positive change = improvement)

n = 58

n = 40

 

1.9 (0.5 to 3.3)

4.2 (2.5 to 5.9)

-2.27 (-4.47 to -0.08)

Modified Von Korff disability score (positive change = improvement)

n = 64

n = 49

 

17.1 (10.9 to 23.3)

18.2 (11.0 to 25.3)

-1.07 (-10.50 to 8.37)

Modified Von Korff pain score (positive change = improvement)

n = 66

n = 50

 

14.7 (7.6 to 21.9)

24.0 (16.6 to 31.4)

-9.24 (-19.44 to 0.96)

Norm-based physical component score of SF-12 (negative change = improvement)

n = 53

n = 35

 

-5.5 (-7.7 to -3.3)

-6.3 (-9.1 to -3.6)

0.80 (-2.71 to 4.32)

Norm-based mental component score of SF-12 (negative change = improvement)

n = 53

n = 35

 

-3.4 (-6.4 to -0.4)

-1.8 (-5.5 to 1.9)

-1.64 (-6.36 to 3.09)

Hospital anxiety and depression scale: anxiety (positive change = improvement)

n = 57

n = 36

 

0.5 (-0.5 to 1.5)

1.0 (-0.2 to 2.2)

-0.46 (-2.01 to 1.09)

Hospital anxiety and depression scale: depression (positive change = improvement)

n = 55

n = 36

 

1.1 (0.2 to 2.0)

2.2 (1.1 to 3.3)

-1.12 (-2.52 to 0.28)

Pain self-efficacy questionnaire (negative change = improvement)

n = 57

n = 38

 

-4.6 (-9.4 to 0.2)

-7.3 (-12.2 to -2.5)

2.74 (-4.04 to 9.51)

Fear avoidance beliefs questionnaire (positive change = improvement)

n = 56

n = 36

 

2.0 (0.2 to 3.9)

2.1 (-0.2 to 4.4)

-0.09 (-3.04 to 2.87)

  1. *Mean difference = (decision support package – usual care) after adjusting for years of experience and pain severity at baseline as fixed effects and physiotherapist as random effects; negative difference = favours usual care.