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Table 5 Within-group NDI score comparison*

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

  Intervention group    Control group   
Sections* Pre Post    Pre Post   
  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 0 0 6.50 78.00 1.79 0.001 1.50 1.50 1.50 1.50 0 1.000
Personal care (washing, dressing, etc.) 0 0 4.00 28.00 1.16 0.014 0 0 0 0 0 1.000
Lifting 0 0 3.50 21.00 1.01 0.027 1.50 3.00 0 0 0.570 0.180
Reading 2.50 2.50 4.79 33.50 1.00 0.028 1.00 1.00 0 0 0.417 0.317
Headaches 0 0 5.00 45.00 1.35 0.006 0 0 2.00 6.00 0.756 0.083
Concentration 0 0 4.50 36.00 1.22 0.01 2.00 4.00 2.00 2.00 0.237 0.564
Work 0 0 5.00 45.00 1.33 0.006 1.00 1.00 0 0 0.417 0.317
Driving 0 0 5.00 45.00 1.33 0.007 1.00 1.00 0 0 0.417 0.317
Sleeping 0 0 4.00 28.00 1.28 0.008 0 0 1.50 3.00 0.603 0.157
Recreation 0 0 3.50 21.00 1.15 0.014 1.50 3.00 0 0 0.603 0.157
Total NDI score, MD (95% CI) 27.08 ± 9.78 17.41 ± 7.10 − 9.66 (− 6.43, − 12.89) − 3.66  < 0.001 25.41 ± 10.78 25.58 ± 10.38 0.16 (− 1.21, 0.87) 0.015 0.732
  1. * P < 0.05, All P-values are obtained from Wilcoxon signed-rank test except for total NPAD score obtained from paired 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)