Table

Demographics, complications, outcomes, and discharge disposition across functional dependence groups. Increasing functional dependence category was analyzed as a predictor for various inferior outcomes with 95% CIs.

Characteristics	Functional Dependence Groups				Increasing Functional Dependence
Characteristics	Independent(N = 39,030)	Moderate(N = 1774)	Severe(N = 186)	P Value	OR	95% CI	P Value
Demographics
Age (y)	57 ± 13	62 ± 14	56 ± 19	<0.001^{^a}	3.41	(2.89–3.95)	<0.001^{^a}
Body mass index (kg/m²)	30 ± 6.5	30 ± 7.8	28 ± 9.5	0.005^{^a}	−0.24	(−0.50 to 0.03)	0.084
Sex (% women)	53%	49%	49%	0.002^{^a}	0.87	(0.80–0.95)	0.001^{^a}
Invasiveness index	6.8 ± 3.9	8.3 ± 4.9	9.0 ± 6.1	<0.001^{^a}	1.37	(1.21–1.53)	<0.001^{^a}
Charlson Comorbidity Index	2.4 ± 1.6	3.4 ± 2.1	3.0 ± 2.3	<0.001^{^a}	0.73	(0.66–0.80)	<0.001^{^a}
Complications
Surgical site infection	1.5%	2.9%	2.2%	<0.001^{^a}	1.48	(1.15–1.90)	0.002^{^a}
Urinary tract infection	1.5%	4.5%	11.3%	<0.001^{^a}	2.45	(2.04–2.95)	<0.001^{^a}
Deep venous thrombosis	1.2%	3.7%	5.4%	<0.001^{^a}	2.12	(1.71–2.63)	<0.001^{^a}
Implant failure	2.2%	2.8%	2.2%	0.140	1.06	(0.82–1.36)	0.668
Clinical outcomes
Inpatient length of stay (d)	3.8 ± 7.6	8.4 ± 9.4	10.9 ± 13	<0.001^{^a}	3.38	(3.08–3.68)	<0.001^{^a}
Any readmission	10.3%	30.2%	2.7%	<0.001^{^a}	2.72	(2.48–2.98)	<0.001^{^a}
Never events overall	4.0%	9.9%	17.7%	<0.001^{^a}	1.97	(1.72–2.26)	<0.001^{^a}
Discharge disposition
Home	77.1%	32.6%	26.9%	<0.001^{^a}	0.21	(0.19–0.23)	<0.001^{^a}
Subacute rehab	7.5%	19.7%	16.7%	<0.001^{^a}	1.63	(1.63–1.45)	<0.001^{^a}
Acute care facility	0.3%	1.5%	3.2%	<0.001^{^a}	2.69	(1.87–3.86)	<0.001^{^a}
Skilled nursing facility	7.1%	17.5%	18.8%	<0.001^{^a}	1.51	(1.33–1.71)	<0.001^{^a}
Expired	0.2%	0.9%	3.8%	<0.001^{^a}	2.54	(1.67–3.84)	<0.001^{^a}

↵a Statistically significant at P < 0.05.