Table IV.

Factors associated with unplanned readmissions

	Subdistribution hazard ratio (95% CI) *	Hazard ratio (95% CI*)†
Index burn center care	0.77 (0.65–0.92)	0.76 (0.64–0.90)
Female sex	0.99 (0.82–1.19)	0.98 (081–1.18)
Age group
16–44y	Ref	Ref
45–64 y	1.39 (1.14–1.70)	1.40 (1.14–1.71)
65–74 y	1.92 (1.43–2.59)	2.07 (1.54–2.77)
≥75 y	2.67 (1.95–3.65)	2.82 (2.06–3.85)
Income quintile
1 (Lowest)	Ref	Ref
2	1.20 (0.95–1.51)	1.18 (0.94–1.48)
3	0.98 (0.76–1.26)	0.94 (0.74–1.21)
4	0.83 (0.64–1.08)	0.81 (0.62–1.05)
5 (Highest)	0.71 (0.53–0.96)	0.72 (0.53–0.96)
Comorbidity band‡
1 (Lowest)	Ref	Ref
2	1.60 (0.89–2.85)	1.62 (0.91–2.90)
3	1.84 (1.09–3.10)	1.87 (1.11–3.15)
4	2.50 (1.46–4.28)	2.55 (1.49–4.36)
5 (Highest)	4.71 (2.75–8.08)	5.10 (2.97–8.73)
% TBSA burn (per % increase)	1.00 (0.99–1.01)	1.00 (0.99–1.01)
Index discharge disposition
Home	Ref	Ref
Home with support	0.95 (0.77–1.16)	0.94 (0.77–1.15)
Rehabilitation or long-term care	1.74 (1.37–2.22)	1.77 (1.39–2.25)
Other inpatient	1.23 (0.79–1.91)	1.39 (0.91–2.12)
Other	1.47 (0.96–2.24)	1.43 (0.93–2.19)

^*Derived from Fine and Gray competing risk regression model.

^†Derived from Cox Proportional Hazards model.

^‡Measure of comorbidity burden based on health care utilization in 2 years prior to injury.