The effect of BMI on long-term outcomes after operatively treated ankle fractures: a study with up to 16 years of follow-up

Table 3 Manchester Oxford Foot Questionnaire (MOXFQ) and SF-12 by BMI category

	Responders all	Normal weight	Overweight	Obese	Unadjusted Difference (95%CI)^a	Adjusted Difference (95%CI)^a
	N = 478	N = 226	N = 170	N = 82	Unadjusted Difference (95%CI)^a	Adjusted Difference (95%CI)^a
MOXFQ mean, SD
Pain	23.2 ± 25.7	18.7 ± 22.1	24.5 ± 27	33 ± 29	14.3 (7.9; 20.7)	12.9 (6.2; 19.5)
Walking function	17.6 ± 25.3	12.5 ± 21.1	19.6 ± 26.9	27.3 ± 29	14.8 (8.5; 21.2)	12.7 (6.0; 19.3)
Social interaction	11.9 ± 20.4	8.9 ± 17.8	12.8 ± 21	18.3 ± 24.2	9.3 (4.1; 14.6)	7.7 (2.2; 13.2)
Single index score	17.8 ± 22.7	13.5 ± 19.3	19.5 ± 24.2	26.3 ± 25.4	12.7 (6.9; 18.6)	11.3 (5.3; 17.3)
SF-12 mean, SD	N = 456	N = 218	N = 163	N = 75
pcs	47.2 ± 9.6	48.7 ± 9.3	46.7 ± 9.5	43.9 ± 9.7	-4.8 (-2.3; -7.2)	-3.5 (-1.0; -6.0)
mcs	46.8 ± 10.4	47.2 ± 10.3	47.3 ± 10.1	44.4 ± 11.1	-2.8 (-0.1; -5.5)	-2.2 (0.6; -5.1)

^aUnadjusted and adjusted mean differences between normal weight and obese group. Adjustment was performed for age, ASA score, smoking status, diabetes, and fracture displacement using a general linear model
^bSF-12 pcs physical component score, mcs mental component score

ISSN: 1471-2474