. Author manuscript; available in PMC: 2022 Jul 21.

Published in final edited form as: J Bone Joint Surg Am. 2021 Jul 21;103(14):1328–1334. doi: 10.2106/JBJS.20.01586

TABLE II.

Association Between Heterotopic Ossification and Revision Surgery 24 Months Post-Fracture (N = 1,426; 116 Events)

Independent Variable	HR (95% CI)	P Value
Heterotopic ossification: yes versus no	0.92 (0.58, 1.44)	0.70
Age	0.99 (0.97, 1.02)	0.52
Prefracture living status: institutionalized versus not institutionalized	0.93 (0.34, 2.54)	0.88
Independent ambulation: yes versus no (any aid used)	1.29 (0.84, 1.98)	0.25
ASA class: III/IV/V versus I/II	0.93 (0.64, 1.36)	0.70
Implant received: total hip arthroplasty versus hemiarthroplasty	0.95 (0.66, 1.37)	0.78