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Table 2 The changes in primary outcomes (NDI) in experimental and control groups vs time

From: Does improvement towards a normal cervical sagittal configuration aid in the management of cervical myofascial pain syndrome: a 1- year randomized controlled trial

Outcome Experimental group Control group Mean difference (95% CI) P value effect size (Cohen’s d) Effect size r
NDI
 Baseline 35.7 ± 2.6 35.1 ± 3.2 [−.5 1.7] .2   
 After 10 weeks 23.3 ± 2.8 24 ± 1.8 [−1.59 .13] .09   
 1-year follow up 17.4 ± 1.3 28.5 ± 1.2 [−11.9-10.2] < 0.001 8.8 .9
G < 0.001  
T < 0.001
G*T < 0.001
  1. NDI Neck disability index, G group T: time G vs T: group versus time