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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.