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Table 3 Adjusted mean differences of patient-reported outcomes

From: Development of an attention-touch control for manual cervical distraction: a pilot randomized clinical trial for patients with neck pain

Outcome variable Treatment group comparison Mean differencea 95 % Confidence intervala
Neck Pain VAS (mm)b High vs. Low 15.6 1.6 to 29.7
  Medium vs. Low 9.8 −3.7 to 23.3
  High vs. Medium 5.8 −8.6 to 20.3
Neck Disability Indexb High vs. Low 2.7 −0.1 to 5.6
  Medium vs. Low 3.0 0.1 to 5.9
  High vs. Medium 0.2 −2.7 to 3.2
PROMIS –
Pain Interferencec High vs. Low 3.9 −5.6 to 2.7
  Medium vs. Low −1.5 1.0 to 0.1
  High vs. Medium 5.4 −2.2 to 9.8
PROMIS –
Physical Function High vs. Low −0.2 −2.2 to 1.9
  Medium vs. Low −1.0 −3.1 to 1.2
  High vs. Medium 0.3 −1.9 to 2.5
PROMIS - Fatigue High vs. Low 5.8 1.1 to 10.5
  Medium vs. Low 3.3 −1.5 to 8.2
  High vs. Medium 2.5 −2.3 to 7.3
PROMIS –
Sleep Disturbance High vs. Low 1.3 −0.9 to 3.5
  Medium vs. Low −1.4 −3.6 to 0.9
  High vs. Medium 2.7 0.4 to 5.0
  1. High High force group (51 to 100 Newtons), Low Low force group (0 to 20 Newtons), Medium Medium force group (21 to 50 Newtons), PROMIS Patient-Reported Outcomes Measurement Information System, VAS Visual Analog Scale
  2. aAdjusted for the baseline value of the respective variable centered at its mean;
  3. bAlso adjusted for traction-force feedback method; cAlso adjusted for baseline neck pain VAS