Table 3.

In-hospital and ninety-day comparison of systemic complications.

Systemic Complication	Bilateral Primary THA (n = 730)	Unilateral Primary THA (n = 106,859)	ORa (95% CI)
Deep Vein Thrombosis
In-hospital	1 (0.1)	270 (0.3)	0.59 (0.04–2.65)
90-day	9 (1.2)	1781 (1.7)	0.86 (0.41–1.57)
Altered Mental Status
In-hospital	3 (0.4)	326 (0.3)	2.61 (0.80–6.17)
90-day	3 (0.4)	1026 (1.0)	0.56 (0.14–1.45)
Pulmonary Embolism
In-hospital	2 (0.3)	239 (0.2)	1.42 (0.23–4.46)
90-day	5 (0.7)	1005 (0.9)	0.87 (0.31–1.88)
Anemia
In-hospital	235 (32.2)	22,583 (21.1)	1.96 (1.67–2.29)
90-day	84 (11.5)	7866 (7.4)	1.99 (1.57–2.49)
Acute Renal Failure
In-hospital	11 (1.5)	2370 (2.2)	0.96 (0.49–1.65)
90-day	12 (1.6)	2323 (2.2)	1.11 (0.59–1.88)
Myocardial Infarction
In-hospital	0 (0.0)	231 (0.2)	NA
90-day	5 (0.7)	540 (0.5)	1.93 (0.69–4.21)
Cerebrovascular Event
In-hospital	1 (0.1)	895 (0.8)	0.23 (0.01–1.02)
90-day	2 (0.3)	1778 (1.7)	0.23 (0.04–0.72)
Pneumonia
In-hospital	0 (0.0)	442 (0.4)	0.82 (0.14–2.57)
90-day	4 (0.6)	1465 (1.4)	0.78 (0.31–1.60)
Respiratory Failure
In-hospital	2 (0.3)	1021 (1.0)	0.65 (0.16–1.71)
90-day	3 (0.4)	1367 (1.3)	0.64 (0.20–1.51)
Urinary Tract Infection
In-hospital	11 (1.5)	1393 (1.3)	1.68 (0.86–2.92)
90-day	21 (2.9)	4574 (4.3)	0.96 (0.60–1.45)

THA, Total Hip Arthroplasty; OR, Odds ratio; CI, confidence interval.

^aAdjusting for sex, age, BMI, diabetes, tobacco use, and CCI.