Table 3 Factors affecting the amount of changes of joint-line convergence angle (JLCA)
Parameters | Correlation coefficient with ΔJLCA (P value) | Risk of JLCA decrease ≥ 2°: OR (95% CI, P value) | |
|---|---|---|---|
Univariable | Multivariable | ||
Demographic factors | |||
Age | 0.175 (0.121) | 0.960 (0.889–1.036, 0.294) | |
Sex (female) | 0.136 (0.231)a | 3.462 (0.416–28.819, 0.251) | |
Height | − 0.012 (0.914) | 1.004 (0.938–1.074, 0.912) | |
Weight | − 0.136 (0.230) | 1.022 (0.979–1.067, 0.324) | |
BMI | − 0.192 (0.089) | 1.107 (0.959–1.276, 0.164) | |
Radiographic parameters | |||
Preoperative mFTA | 0.497 (< 0.001) | 0.651 (0.525–0.809, < 0.001) | – |
Preoperative mLDFA | − 0.179 (0.113) | 1.209 (0.913–1.600, 0.185) | |
Preoperative mMPTA | 0.136 (0.228) | 0.765 (0.571–1.024, 0.072) | |
Preoperative JLCA (standing) | − 0.724 (< 0.001) | 7.181 (2.711–19.021, < 0.001) | 4.429 (1.350–14.534, 0.014) |
Preoperative JLCA (supine) | − 0.227 (0.043) | 1.718 (1.006–2.932, 0.047) | – |
Difference of JLCA standing and supine | − 0.755 (< 0.001) | 22.679 (4.415–116.490, < 0.001) | 11.74 (1.770–77.886, 0.011) |
Preoperative TPS | − 0.083 (0.465) | 1.110 (0.926–1.332, 0.260) | |
Postoperative mFTA | 0.018 (0.875) | 0.896 (0.728–1.102, 0.299) | |
Postoperative mMPTA | − 0.232 (0.039) | 1.178 (0.973–1.426, 0.093) | |
Postoperative JLCA (standing) | 0.097 (0.394) | 1.340 (0.805–2.230, 0.260) | |
Postoperative JLCA (supine) | − 0.053 (0.642) | 1.178 (0.711–1.954, 0.525) | |
Postoperative TPS | − 0.121 (0.286) | 1.127 (0.946–1.343, 0.180) | |
Change of mFTA | − 0.457 (< 0.001) | 1.360 (1.135–1.629, 0.001) | – |
Change of mMPTA | − 0.298 (0.007) | 1.282 (1.062–1.547, 0.010) | – |
Change of TPS | − 0.049 (0.669) | 1.032 (0.860–1.240, 0.733) | |