Table 5. Results of univariate linear regression analysis for the DFNFs in the adult group.

Variable	β value	95% CI	P value
Side	−0.652	−2.163 to 0.859	0.395
Age	0.071	−0.004 to 0.146	0.063
Sex	0.747	−0.772 to 2.265	0.332
Diameter of femoral head	−0.072	−0.270 to 0.127	0.477
Garden type	1.563	0.049 to 3.077	0.043
Pauwels angle	−0.049	−0.121 to 0.024	0.186
Pauwels classification	−2.105	−3.725 to −0.484	0.011
Simplified AO/OTA classification
32B1.3	Reference
31B2.1	−2.673	−5.125 to −0.221	0.033
31B2.2	−2.230	−4.363 to −0.098	0.041
31B2.3	−2.449	−4.444 to −0.454	0.017
AO/OTA classification
31B1.3	Reference
31B 2.1q	−2.838	−5.355 to −0.321	0.027
31B 2.1r	−1.352	−7.129 to 4.425	0.644
31B 2.2q	−2.027	−4.156 to −0.102	0.062
31B 2.2r	−8.342	−16.359 to −0.325	0.042
31B 2.3q	−2.966	−5.051 to −0.882	0.006
31B 2.3r	−0.742	−3.684 to 2.199	0.618

q, 30°≤ Pauwels angle ≤70°; r, Pauwels angle >70°. DFNF, displaced femoral neck fracture; CI, confidence interval; AO/OTA, AO Foundation/Orthopaedic Trauma Association.