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Table 4 Between-group NDI score pre and post-intervention

From: Effectiveness of isometric exercises on disability and pain of cervical spondylosis: a randomized controlled trial

  Pre-intervention Post-intervention
Sections Intervention group Control group   Intervention group Control group  
  Mean Rank Sum of Ranks Mean Rank Sum of Ranks d P-value* Mean Rank Sum of Ranks Mean Rank Sum of Ranks D P-value*
Pain intensity 12.67 152.00 12.33 148.00 0 1.000 9.13 109.50 15.88 190.50 1.086 0.017
Personal care (washing, dressing, etc.) 13.29 159.50 11.71 140.50 0 1.000 11.33 136.00 13.67 164.00 0.335 0.443
Lifting 12.63 151.50 12.38 148.50 0.570 0.180 9.79 117.50 15.21 182.50 0.829 0.060
Reading 13.04 156.50 11.96 143.50 0.417 0.317 10.25 123.00 14.75 177.00 0.671 0.128
Headaches 11.25 135.00 13.75 165.00 0.756 0.083 8.33 100.00 16.67 200.00 1.459 0.003
Concentration 13.33 160.00 11.67 140.00 0.237 0.564 10.63 127.50 14.38 172.50 0.550 0.198
Work 14.13 169.50 10.88 130.50 0.417 0.317 11.00 132.00 14.00 168.00 0.434 0.319
Driving 13.00 156.00 12.00 144.00 0.417 0.317 9.13 109.50 15.88 190.50 1.086 0.017
Sleeping 11.58 139.00 13.42 161.00 0.603 0.157 10.67 128.00 14.33 172.00 0.537 0.219
Recreation 14.50 174.00 10.50 126.00 0.603 0.157 13.00 156.00 12.00 144.00 0.142 0.755
Total NDI score, MD (95% CI) 27.08 ± 9.78 25.41 ± 10.78 1.66 (-7.04, 10.38)   0.162 0.696 17.41 ± 7.10 25.58 ± 10.38 -8.16 (− 15.70, − 0.63) − 0.918 0.035 0.035
  1. *P < 0.05, All P-values are obtained from Mann–Whitney U test except for total NDI score obtained from independent samples t-test
  2. Significant P-values are showed in bold
  3. MD, Mean Difference, NDI, Neck Disability Index, d, Effect size (Cohen’s d)