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Table 2 Intragroup analysis. Changes to immediate, short, and medium terms according to study group

From: Manual therapy versus therapeutic exercise in non-specific chronic neck pain: a randomized controlled trial

  VAS pre (i) VAS week 1 (i) VAS week 4 (i) VAS week 12 (i) NDI pre (i) NDI week 1 (i) NDI week 4 (i) NDI week 12 (i) PPT pre (i) PPT week 1 (i) PPT week 4 (i) PPT week 12 (i)
Manual therapy 41.95 ± 4.03 32.77 ± 3.14 15.82 ± 3.26 18.23 ± 4.33 27.32 ± 8.80 22.00 ± 8.54 11.82 ± 2.00 11.23 ± 8.42 21.78 ± 1.42 21.51 ± 1.25 26.91 ± 1.41 26.79 ± 2.09
P   0.007*b 0.001*b 0.002*b   0.001a 0.001b 0.001a   0.806a 0.001a 0.003a
Therapeutic exercise 48.17 ± 3.48 35.83 ± 3.88 17.83 ± 3.42 24.43 ± 4.70 27.96 ± 9.68 19.17 ± 8.90 9.87 ± 1.78 13.09 ± 11.94 20.33 ± 1.31 20.70 ± 1.59 22.30 ± 1.84 25.22 ± 1.73
P   0.008*a 0.001*b 0.002*b   0.001a 0.001b 0.001b   0.729a 0.061a 0.001a
Control 49.80 ± 3.53 49.25 ± 3.53 50.55 ± 3.54 48.75 ± 3.51 29.38 ± 14.63 31.14 ± 15.84 31.20 ± 3.51 29.90 ± 14.66 23.33 ± 1.26 23.12 ± 1.22 23.23 ± 1.17 23.18 ± 1.14
P   0.342a 0.518a 0.337a   0.194b 0.105b 0.505b   0.566a 0.673a 0.634a
  1. Control control group, Manual therapy manual therapy group, Therapeutic exercise therapeutic exercise group, P statistical significance from tests, VAS visual analog scale (mm), NDI Neck Disability Index (%), PPT pressure pain threshold (N/cm2)
  2. (i) Dates expressed as means ± standard deviation
  3. aStudent’s t for paired samples
  4. bWilcoxon Z
  5. *Statistically significant differences between groups (P < 0.05)