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Table 1 Baseline participant characteristics*

From: Illustrating risk difference and number needed to treat from a randomized controlled trial of spinal manipulation for cervicogenic headache

 

SMT

(n = 40)

LM

(n = 40)

All

(n = 80)

Sociodemographic information

   

   Age (years)

37 ± 11

36 ± 11

36 ± 11

   Gender (female)

80%

80%

80%

Cervicogenic headache

   

   Pain intensity (100-point scale)

50.9 ± 17.0

57.8 ± 16.3

54.3 ± 16.9

   Number of headaches in the past 4 weeks

15.4 ± 8.0

16.0 ± 7.8

15.7 ± 7.9

   Disability (100-point scale)

42.7 ± 23.1

47.4 ± 22.9

45.0 ± 22.9

Migraine sufferer (self report)

30%

25%

28%

Optimal number of treatments (4 - 20)

   

   SMT

12.9 ± 4.9

12.5 ± 5.1

12.7 ± 5.0

   LM

14.3 ± 4.8

14.2 ± 5.4

14.3 ± 5.0

Expectations †

   

   Confidence in success of SMT

4.2 ± 1.2

4.1 ± 1.3

4.1 ± 1.3

   Confidence in success of LM

4.0 ± 1.2

4.1 ± 1.2

4.1 ± 1.2

  1. SMT - spinal manipulative therapy; LM - light massage.
  2. * Values are means ± SD or percentage.
  3. † 6-point Likert scale anchored by 1 = extremely uncertain and 6 = extremely certain.