Table 5 Comparison of the ROM among the four groups before the operation and at the last follow-up (°, \(\overline{\text{x}}\) ± s)
BMI group | Preop | Last follow-up | Difference between last follow-up and preop | T value | P value |
|---|---|---|---|---|---|
< 23 | 123.3 ± 8.7 | 123.6 ± 7.5 | 0.3 ± 3.9 | 0.54 | 0.59 |
23- < 25 | 120.1 ± 9.7 | 121.0 ± 12.6 | 0.9 ± 7.3 | 0.95 | 0.35 |
25- < 30 | 121.9 ± 8.4 | 122.5 ± 10.1 | 0.6 ± 4.0 | 1.86 | 0.07 |
≥30 | 119.3 ± 12.1 | 119.7 ± 11.4 | 0.4 ± 5.3 | 0.52 | 0.60 |
F value (between groups) | 2.107 | 1.542 | |||
P value (between groups) | 0.099 | 0.204 |