Short-term difference only in reported outcomes (PROMs) after anterior or posterior approach to total hip arthroplasty: a 4-year prospective multi-centre observational study

Table 2 Pre- and post-operative opiate use, and patient-reported outcome measures (PROMs) for anterior and posterior hip arthroplasty

	Anterior (n = 337)	Posterior (n = 182)	p value
Opiate use, n (%)^a
Pre-operative	108 (32)	55 (30)	0.67^a
6 weeks post-operative	0 (0)^c	0 (0)^f	–
6 months post-operative	0 (0)^d	0 (0)^g	–
1 year post-operative	0 (0)^e	0 (0)^h	–
Oxford Hip Score total, median (IQR)^b
Pre-operative	12 (8–20)	12 (7–18)	0.41^b
6 weeks post-operative	33 (25–38)^c	30 (23–36)^f	0.02^b
6 months post-operative	41 (33–45)^d	37 (30–44)^g	0.10^b
1 year post-operative	44 (40–47)^e	44 (33–48)^h	0.56^b
EQ-5L-5D Health Questionnaire Utility Scores, median (IQR)^b
Pre-operative	− 0.030 (− 0.676 to 0.911)	− 0.024 (− 0.176 to 0.367)	0.47^b
6 weeks post-operative	0.672 (0.521–0.805)^c	0.672 (0.502–0.805)^f	0.69^b
6 months post-operative	0.860 (0.661–1.000)^d	0.884 (0.661–1.000)^g	0.70^b
1 year post-operative	1.000 (0.860–1.000)^e	1.000 (0.733–1.000)^h	0.07^b

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