Table 5 Postoperative complications and patient-reported outcome measures to 6 months post-surgery according to weight change in patients with BMI ≥ 30 kg/m²

Complications, n (%)

 Acute to 6 months post-surgery

310 (38.3)

268 (37.9)

42 (41.2)

Major complications, n (%)

 Acute to 6 months post-surgery

86 (10.6)

74 (10.5)

12 (11.8)

 Acute to discharge

42 (5.2)

36 (5.1)

6 (5.9)

 From discharge to 6 months post-surgery

45 (5.6)

39 (5.5)

6 (5.9)

Oxford Score at 6 months post-surgery (0–48), mean (SD)^j

 Oxford Hip Score

42.2 (6.98)^a

42.1 (7.18)^b

42.4 (5.17)^c

 Oxford Knee Score

37.8 (8.17)^d

37.7 (8.08)^e

38.2 (8.80)^f

EQ-VAS at 6 months post-surgery (0–100), mean (SD)^j

74.0 (18.8)^g

74.0 (19.0)^h

74.4 (18.0)ⁱ

Patient-rated improvement from surgery, n (%)

 Much worse

15 (1.9)

14 (2.0)

1 (1.0)

 A little worse

11 (1.4)

10 (1.4)

1 (1.0)

 About the same

21 (2.6)

19 (2.7)

2 (2.0)

 A little better

106 (13.1)

89 (12.6)

17 (16.7)

 Much better

598 (73.9)

524 (74.1)

74 (72.5)

 Missing

58 (7.2)

51 (7.2)

7 (6.9)