Table 4: Between Groups Effects after 4 weeks of intervention of the 3 groups.
VAS: Visual Analogue Scale; NDI: Neck Disability Index; Flex: Flexion, deg.: degrees; Ext: Extension; RR: Right Rotation; LR: Left Rotation; RLF: Right Lateral Flexion; LLF: Left Lateral Flexion; CI: Confidence interval; p: probability value. *Data are mean± SD, P-Value < 0.05 indicate statistical significance.
| Outcome | GI Versus GII | GI Versus GIII | GII Versus GIII | Effect Size |
| MD (99% CI) | P-Value | MD (99% CI) | P-Value | MD (99% CI) | P-Value |
| NDI | 11.33 (6.35, 16.32) | 0.0001 | 4.27 (-0.72, 9.25) | 0.12 | -7.07 (-12.05, -2.08) | 0.003 | 0.44 |
| VAS (mm) | 3.63 (2.51, 4.76) | 0.0001 | 1.44 (0.31, 2.57) | 0.008 | -2.19 (-3.32, -1.07) | 0.0001 | 0.61 |
| Flex (deg.) | -9.07 (-12.13, -6.01) | 0.0001 | 2.33 (0.88, 5.55) | 0.024 | 6.73(-3.51,9.95) | 0.0001 | 0.59 |
| Ext.(deg.) | -15.8 (-21.23, -10.38) | 0.0001 | -5.07 (-10.49, 0.36) | 0.07 | -10.73 (5.31, 16.16) | 0.0001 | 0.57 |
| RR (deg.) | -17.2 (-23.08, -11.32) | 0.0001 | -5.93 (-11.82, -0.05) | 0.047 | 11.27 (5.38, 17.15) | 0.0001 | 0.57 |
| LR (deg.) | -17.47 (-23.33, -11.6) | 0.0001 | -6.33 (-12.2, -0.47) | 0.03 | 11.13 (5.27, 16.99) | 0.0001 | 0.57 |
| RLF (deg.) | -9.53 (-13.98, -5.09) | 0.0001 | -1.73 (-6.18,2.71) | 0.99 | 7.8 (3.36, 12.25) | 0.0002 | 0.44 |
| LLF (deg.) | -9.13 (-13.55, -4.72) | 0.0001 | -1.13 (-5.55,3.28) | 0.99 | 8.0 (3.59, 12.41) | 0.0001 | 0.43 |