Table 2

Results of multivariate analysis of misdiagnosis at the first visit

	B	SE	Wald	OR	95% CI	P value
Main symptom
Lower limbs were asymmetrical				Reference
Buttock lines are asymmetrical	−0.23	0.49	0.22	0.80	0.31 to 2.07	0.638
Abnormal gait	−0.33	0.39	0.73	0.72	0.34 to 1.53	0.394
Abnormal hip	−0.80	0.57	2.01	0.45	0.15 to 1.36	0.156
Hospital level
Tertiary				Reference
Secondary	0.12	0.60	0.04	1.13	0.35 to 3.69	0.842
Primary	−0.03	0.60	0.00	0.97	0.30 to 3.16	0.959
Department
Paediatric orthopaedics				Reference
Surgery	−1.42	0.73	3.80	0.24	0.06 to 1.01	0.051
Paediatrics	−1.56	0.43	12.97	0.21	0.09 to 0.49	<0.001
General orthopaedics	−0.94	0.34	7.46	0.39	0.20 to 0.77	0.006
Title of the physician
Junior				Reference
Intermediate	0.43	0.35	1.48	1.53	0.77 to 3.04	0.223
Senior	0.91	0.33	7.45	2.47	1.29 to 4.73	0.006
Infant physical examination
Yes				Reference
No	0.20	0.32	0.39	1.23	0.65 to 2.31	0.532
Family history
Yes				Reference
No	−0.31	0.52	0.36	0.74	0.27 to 2.02	0.552
Severity of DDH
Mild (Graf: Ⅱb–Ⅱc /Tönnis: 1–2)				Reference
Severe (Graf: Ⅲ–Ⅳ/Tönnis: 3–4)	0.15	0.27	0.30	1.16	0.68 to 1.97	0.585