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Table 2 Between-group NPAD 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   
Questions 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*
How bad is your pain today? 10.29 123.50 14.71 176.50 0.65 0.113 9.50 114.00 15.50 186.00 0.93 0.030
How bad is your pain on the average? 12.46 149.50 12.54 150.50 0.01 0.976 6.88 82.50 18.13 217.50 2.68  < 0.001
How bad is your pain at its worst? 12.17 146.00 12.83 154.00 0.09 0.781 6.58 79.00 18.42 221.00 3.05  < 0.001
Does your pain interfere with your sleep? 10.75 129.00 14.25 171.00 0.51 0.212 8.33 100.00 16.67 200.00 1.45 0.003
How bad is your pain with standing? 11.46 137.50 13.54 162.50 0.29 0.461 9.42 113.00 15.58 187.00 0.96 0.028
How bad is your pain with walking? 11.92 143.00 13.08 157.00 0.16 0.675 9.67 116.00 15.33 184.00 0.87 0.040
Does your pain interfere with driving or riding in a car? 10.42 125.00 14.58 175.00 0.61 0.136 9.83 118.00 15.17 182.00 0.81 0.058
Does your pain interfere with social activities? 10.67 128.00 14.33 172.00 0.53 0.195 8.88 106.50 16.13 193.50 1.19 0.009
Does your pain interfere with recreational activities? 10.04 120.50 14.96 179.50 0.75 0.078 8.33 100.00 16.67 200.00 1.45 0.003
Does your pain interfere with work activities? 12.21 146.50 12.79 153.50 0.08 0.824 6.67 80.00 18.33 220.00 2.91  < 0.001
Does your pain interfere with your personal care (eating, dressing, bathing, etc.)? 12.00 144.00 13.00 156.00 0.14 0.718 9.00 108.00 16.00 192.00 1.13 0.013
Does your pain interfere with your personal relationship (family, friends, sex, etc.)? 13.08 157.00 11.92 143.00 0.16 0.677 7.88 94.50 17.13 205.50 1.72 0.001
How does your pain change your outlook on life and future (depression, hopelessness)? 11.46 137.50 13.54 162.50 0.29 0.457 7.54 90.50 17.46 209.50 1.96  < 0.001
Does your pain affect your emotions? 12.04 144.50 12.96 155.50 0.13 0.741 8.42 101.00 16.58 199.00 1.41 0.004
Does your pain affect your ability to think or concentrate? 14.08 169.00 10.92 131.00 0.46 0.252 8.75 105.00 16.25 195.00 1.25 0.008
How stiff is your neck? 12.46 149.50 12.54 150.50 0.01 0.976 8.50 102.00 16.50 198.00 1.37 0.005
How much trouble do you have turning your neck? 13.63 163.50 11.38 136.50 0.32 0.414 7.63 91.50 17.38 208.50 1.90 0.001
How much trouble do you have turning your neck (look up and down)? 13.08 157.00 11.92 143.00 0.16 0.657 7.88 94.50 17.13 205.50 1.72 0.001
How much trouble do you have working overhead? 11.67 140.00 13.33 160.00 0.23 0.545 8.54 102.50 16.46 197.50 1.35 0.005
How much do pain pills help? 12.63 151.50 12.38 148.50 0.03 0.930 8.54 102.50 16.46 197.50 1.35 0.005
Total NPAD score, MD (95% CI) 61.67 ± 6.56 68.25 ± 23.36 -6.58 (-21.11, 7.94) -0.38 0.358 25.33 ± 6.81 66.67 ± 21.51 -41.33 (-54.84, -27.82) -2.58  < 0.001
  1. *P < 0.05, All P-values are obtained from Mann–Whitney U test except for total NPAD score obtained from independent samples t-test
  2. Significant P-values are showed in bold
  3. MD, Mean Difference, NPAD, Neck Pain and Disability, d, Effect size (Cohen’s d)