Table 7.
Between group comparison of the secondary outcome measures at each time point
| Approach | Mean (SD) | 95% Cl | P value | ||
|---|---|---|---|---|---|
| Anterior | Lateral | Anterior | Lateral | ||
| XSMFA functional index | |||||
| Preoperative | 35.2 (16.1) | 40.5(16.0) | 31.4-38.6 | 36.3-43.7 | 0.053a |
| 6 weeks | 21.2 (14.2) | 28.5(15.9) | 17.8-24.2 | 23.7-32.3 | 0.026a |
| 3 months | 12.7(12.5) | 18.8 (16.1) | 9.2-14.8 | 13.7-22.3 | 0.023a |
| 6 months | 11.6(12.1) | 15.8 (15.4) | 8.3-13.7 | 10.7-19.3 | 0.094a |
| 12 months | 10.3(13.0) | 15.1 (16.3) | 7.3-13.3 | 10.5-19.5 | 0.040a |
| XSMFA bother index | |||||
| Preoperative | 48.7 (20.5) | 53.0 (17.9) | 43.4-52.6 | 48.8-57.2 | 0.126a |
| 6 weeks | 26.6 (19.8) | 33.0 (18.3) | 21.6-30.5 | 28.1-37.9 | 0.055a |
| 3 months | 19.8 (17.0) | 33.0 (18.1) | 15.2-22.9 | 28.1-37.9 | 0.099a |
| 6 months | 16.8 (15.8) | 25.1 (17.9) | 12.4-19.6 | 20.0-30.0 | 0.149a |
| 12 months | 15.8 (18.0) | 21.7 (19.6) | 10.8-19.1 | 9.6-20.4 | 0.056a |
| T25-FW (s) | |||||
| Preoperative | 22.4 (5.2) | 24.0 (3.9) | 20.8-23.2 | 23.1-24.9 | 0.193a |
| 6 weeks | 21.3(6.3) | 22.0 (4.2) | 19.6-22.4 | 20.0-23.1 | 0.385a |
| 3 months | 18.5 (3.7) | 19.4 (3.8) | 17.2-18.8 | 17.0-19.0 | 0.291a |
| 6 months | 18.3 (4.1) | 19.9 (5.5) | 17.1-18.9 | 17.5-20.5 | 0.040a |
| 12 months | 18.1 (3.4) | 19.8 (4.6) | 17.2-18.8 | 17.7-20.3 | 0.046a |
| Activity VAS | |||||
| Preoperative | 5.0 (0.8) | 4.9 (0.8) | 4.8-5.2 | 3.8-4.2 | 0.461a |
| 6 weeks | 6.9 (0.7) | 6.8 (0.6) | 5.8-6.2 | 5.8-6.2 | 0.031a |
| 3 months | 7.3 (0.8) | 6.9 (0.5) | 6.8-7.2 | 5.9-6.1 | 0.080a |
| 6 months | 7.3 (0.7) | 6.9 (0.7) | 6.8-7.2 | 6.7-7.1 | 0.223a |
| 12 months | 7.5 (0.6) | 7.0 (0.7) | 6.9-7.1 | 6.8-7.2 | <0.001a |
| Walking distance (m) | |||||
| 12 months | 6435 (4260) | 5125 (3868) | 5458-7412 | 4053-6197 | 0.045a |
| SF-36 PCS | |||||
| Preoperative | 27.4 (8.2) | 25.6 (8.7) | 25.5-28.8 | 23.0-27.0 | 0.152a |
| 6 weeks | 39.1 (9.7) | 34.8 (9.8) | 36,8-41,2 | 31.4-36.6 | 0.004a |
| 3 months | 44.6 (9.2) | 40.7 (10.1) | 41.9-46.1 | 37.3-42.7 | 0.031a |
| 6 months | 46.0 (10.0) | 42.7 (5.6) | 43.7-48.3 | 40.5-43.6 | 0.042a |
| 12 months | 47.5 (9.9) | 42.9 (11.9) | 44.7-49.3 | 40.1-43.9 | 0.017a |
| SF-36 MCS | |||||
| Preoperative | 57.2 (8.5) | 56.3 (9.2) | 55.1-58.9 | 53.9-58.1 | 0.405a |
| 6 weeks | 58.1 (8.7) | 59.3 (6.6) | 56.0-60.0 | 57.2-60.8 | 0.465a |
| 3 months | 56.0 (9.2) | 56.7 (8.3) | 53.9-58.1 | 53.8-58.2 | 0.774a |
| 6 months | 56.0 (10.0) | 55.8 (7.2) | 53.7-58.3 | 53.0-57.0 | 0.670a |
| 12 months | 55.0 (9.8) | 56.2 (6.9) | 52.8-57.3 | 54.1-57.9 | 0.714a |
SD standard deviation, Cl confidence interval
a Mann-Whitney-U test