Table 2.
VAS scores within-subjects effects (time) and between-subjects effects (stabilization and nonstabilization group).
| VAS scores (n = 82) | Stabilization Yes, mean ± SD (n = 39) | Stabilization No, mean ± SD (n = 43) | Total | Main effect | Interaction effect | Source of difference for time **** | |
|---|---|---|---|---|---|---|---|
| Time | Group | ||||||
| Beginning (1) | 7.81 ± 0.76 | 7.51 ± 0.56 | 7.67 ± 0.69 | V = 0.983* F = 1130.2 47** P < 0.001* ** | F = 10.141 P = 0.002 | V = 0.130 F = 2.882 P = 0.028 | 1-2, 1-3, 1-4, 1-5 |
| 1st month (2) | 4.05 ± 0.62 | 3.85 ± 0.49 | 3.95 ± 0.56 | ||||
| 3rd month (3) | 3.51 ± 0.51 | 3.44 ± 0.50 | 3.47 ± 0.50 | ||||
| 6th month (4) | 3.37 ± 0.49 | 3.18 ± 0.51 | 3.28 ± 0.50 | ||||
| 12th month (5) | 3.28 ± 0.50 | 2.74 ± 0.50 | 3.02 ± 0.57 | ||||
| Total | 4.41 ± 1.82 | 4.14 ± 1.80 | |||||
| Source of difference for interaction (stabilization × time) | |||||||
| Pairwise comparison***** (Time) | P | Pairwise comparison (Time) | P | ||||
| Stabilization Yes | 1-2, 1-3, 1-4, 1-5 2-3, 2-4, 2-5 | <0.001 | Stabilization No | 1-2, 1-3, 1-4, 1-5 2-3, 2-4, 2-5 5-4, 5-3 | <0.001 | ||
| Mauchly’s sphericity test: W = 0.774, χ2 = 20.092, P = 0.017, df = 9, The assumption of sphericity was not met. Multivariate ANOVA (MANOVA) was used. | |||||||
*Pillai’s trace test statistical value for MANOVA. **F test statistical value for MANOVA. ***The mean difference is significant at P < 0.05). ****Simple contrasts (first) were used. *****Simple effects analysis with Bonferroni adjustment were used.