Table 4.
Intragroup and intergroup comparison of the 7 dimensions and the total score of the OHIP-14
| Dimensions OHIP 14 | T0 Mean (SD) | T1 Mean (SD) | T2 Mean (SD) | Statistical difference T0-T1-T2 | T0 Mean (SD) | T1 Mean (SD) | T2 Mean (SD) | Statistical difference T0–T1–T2 | Statistical difference Coef. (95% CI) p value |
Statistical difference Coef. (95% CI) p value |
|---|---|---|---|---|---|---|---|---|---|---|
| Mini Hyrax | Hyrax | Mini Hyrax x Hyrax (T1 × T0) |
Mini Hyrax x Hyrax (T2 × T0) |
|||||||
| FL | 0.73 (1.22)a | 2.53 (2.06)b | 1.93 (1.28)ab | 0.031* | 0.73 (1.10)a | 2.60 (1.18)b | 2.13 (1.88)ab | 0.010* | 0.06 (− 1.21–1.34) 0.916** |
0.20 (− 1.02–1.42) 0.740*** |
| FD | 2.47 (1.80)a | 3.93 (2.15)b | 2.87 (2.03)ab | 0.048* | 1.80 (1.14)a | 3.87 (1.76)b | 2.40 (1.50)a | 0.001* |
0.13 (− 1.36–1.63) 0.859** |
− 0.50 (− 1.90–0.88) 0.463*** |
| PD | 3.87 (2.41)a | 2.40 (2.61)a | 1.60 (2.26)a | 0.088* | 2.53 (2.16)a | 2.47 (2.13)a | 2.00 (1.55)a | 0.646* |
0.26 (− 1.61–2.14) 0.774** |
0.32 (− 1.22–1.68) 0.673*** |
| FD | 0.73 (1.16)a | 0.87 (1.06)a | 0.47 (0.83)a | 0.391* | 0.47 (0.74)a | 1.93 (2.05)a | 1.00 (1.36)a | 0.065* |
1.07 (− 0.18–2.33) 0.091** |
0.59 (− 0.26–1.44) 0.167*** |
| PD | 3.13 (2.29)a | 2.20 (1.74)a | 1.53 (1.76)a | 0.196* | 1.27 (1.38)a | 1.47 (1.76)a | 0.67 (0.72)a | 0.051* |
− 0.94 (− 2.43–0.54) 0.206** |
− 1.15 (− 2.28–0.03) 0.052*** |
| SD | 1.60 (1.84)ab | 1.20 (1.74)a | 0.53 (0.99)b | 0.038* | 0.60 (1.12)ab | 0.67 (1.17)a | 0.13 (0.35)b | 0.009* |
− 0.31 (− 1.48–0.85) 0.583** |
− 0.32 (− 0.91–0.26) 0.272*** |
| HC | 0.80 (1.14)a | 0.40 (0.82)ab | 0.00 (0.00)b | 0.030* | 0.40 (0.73)a | 0.40 (0.82)ab | 0.07 (0.25)b | 0.049* |
0.02 (− 0.61–0.67) 0.930** |
0.06 (− 0.08–0.20) 0.390*** |
| SCO | 13.33 (8.04)ab | 13.53 (7.12)a | 8.93 (5.67)b | 0.026* | 7.80 (6.80)ab | 13.40 (8.49)a | 8.33 (5.86)b | 0.040* |
− 0.08 (− 6.49–6.32) 0.978** |
− 0.70 (− 5.41–4.01) 0.762*** |
T0 pretreatment, T1 14th day of the appliance activation, T2 after 6 months retention period, SD standard deviation, FL functional limitation, FD physical discomfort, PD psychological discomfort, FD physical disability, PD psychological disability, SD social disability, HC handicaps, SCO total score
*ANOVA test for repeated measures, Level of significance p < 0.05
For comparison of pairs T0 X T1, T0 X T2, T1 X T2 in Mini-Hyrax group and Hyrax group, paired t test was employed. Different letters indicate significant difference. Bonferroni correction. Level of significance p < 0.016
Coef coefficient
**Regression analysis assessing differences between Mini-Hyrax and Hyrax groups of the OHIP-14 scores at T1, controlling for the OHIP-14 scores at T0. Level of significance p < 0.05
***Regression analysis assessing differences between Mini-Hyrax and Hyrax groups of the OHIP-14 scores at T2, controlling for the OHIP-14 scores at T0. Level of significance p < 0.05