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Table 3 Proportion of clinical significant improvements, the relative risk and the risk difference

From: The long-term effects of naprapathic manual therapy on back and neck pain - Results from a pragmatic randomized controlled trial

Improvement

Index Group

Control Group

RR

RD

p-value

 

(imp/not imp)†

(imp/not imp)†

(95% CI)

(95% CI)

 

26 weeks

     

Pain*

65%

44%

1.5

21%

 
 

(n = 120/65)

(n = 78/99)

(1.2-1.8)

(10-30)

<0.001

Disability*

74%

63%

1.2

11%

 

(CPQ)

(n = 110/38)

(n = 82/48)

(1.0-1.4)

(4-22)

0.043

Disability*

66%

45%

1.4

21%

 

(WDQ)

(n = 114/59)

(n = 75/90)

(1.2-1.8)

(10-31)

<0.001

52 weeks

     

Pain*

67%

50%

1.3

17%

 
 

(n = 120/59)

(n = 79/79)

(1.1-1.6)

(7-27)

0.002

Disability*

75%

58%

1.3

17%

 

(CPQ)

(n = 109/37)

(n = 68/49)

(1.1-1.5)

(5-28)

0.005

Disability*

68%

49%

1.4

19%

 

(WDQ)

(n = 116/55)

(n = 72/75)

(1.1-1.7)

(8-30)

<0.001

  1. The proportion of patients that reached clinically significant improvements in the intervention groups, the relative risk (RR), and the risk difference (RD), with corresponding 95% confidence intervals (95% CI) and p-values at 26 and 52 weeks follow-ups.
  2. * A clinically important decrease corresponding to at least a two-step decrease in pain score from baseline, or at least a one-step decrease in disability score from baseline, respectively.
  3. † Numbers of very much improved/not very much improved in the intervention groups.