The weight of complications: high and low BMI have disparate modes of failure in total hip arthroplasty

Arthroplasty

Table 3 Risk for each cause for revision by BMI class relative to normal weight

	Underweight			Overweight/obese			Morbidly obese
Cause for Revision	OR	95% CI	P-value	OR	95% CI	P-value	OR	95% CI	P-value
Aseptic Loosening	0.56	0.38–0.84	0.01	1.02	0.95–1.08	0.65	0.93	0.86–1.01	0.09
Dislocation	2.31	1.84–2.91	< 0.001	0.81	0.76–0.87	< 0.001	0.59	0.54–0.65	< 0.001
Mechanical Complication	0.63	0.44–0.89	0.01	1.05	0.99–1.11	0.13	0.92	0.85–0.99	0.02
Periprosthetic/ Total Joint Fracture	1.63	1.10–2.41	0.02	0.90	0.79–1.02	0.10	1.04	0.90–1.21	0.57
Osteolysis/ Polyethylene Wear	0.77	0.42–1.40	0.39	1.12	1.01–1.24	0.03	0.81	0.70–0.93	0.003
Periprosthetic Joint Infection	0.84	0.66–1.07	0.16	1.10	1.05–1.15	< 0.001	1.90	1.80–2.00	< 0.001
Arthrofibrosis	-	-	-	1.58	0.65–3.85	0.31	1.17	0.35–3.94	0.80
Other Joint Complication	0.66	0.47–0.93	0.02	0.95	0.89–1.91	0.12	0.49	0.45–0.54	< 0.001

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