Table 2.

Univariate and multivariate Cox regression model for revision of stemmed hemiarthroplasty (SHA), reverse shoulder arthroplasty (RTSA), sex, age, and period of surgery, (n = 771, revisions = 62)

	Univariate	Multivariate
Factor	HR (CI)	p-value	HR (CI)	p-value
Type of arthroplasty
SHA	1		1
RTSA	2.0 (1.1–3.7)	0.02	1.1 (0.4–2.7)	0.8
Sex
Women	1		1
Men	1.4 (0.8–2.4)	0.2	1.0 (0.5–1.9)	1.0
Age
< 65	1		1
≥ 65	0.7 (0.4–1.2)	0.2	0.7 (0.4–1.2)	0.2
Period of surgery
2006–2010	1		1
2011–2015	1.6 (0.9–2.6)	0.1	1.3 (0.7–2.3)	0.4
SHA + women			1
RTSA + men			3.5 (1.0–12)	0.05

HR (CI): Hazard ratio (95% confidence interval).

SHA: stemmed hemiarthroplasty,

RTSA: reverse shoulder arthroplasty.