Table 3.

Predictors for all-cause 30-day, 60-day, and 90-day readmissions of radiation proctitis in the United States.

Variable	30-Day Readmission aOR (95% CI)	p-Value	60-Day Readmission aOR (95% CI)	p-Value	90-Day Readmission aOR (95% CI)	p-Value
Gender
Male	Referent
Female	1.04 (0.85–1.28)	0.672	1.07 (0.89–1.29)	0.418	1.09 (0.91–1.30)	0.322
Age Groups
18–34	Referent
35–49	0.83 (0.33–2.09)	0.707	0.76 (0.33–1.7)	0.507	0.55 (0.26–1.15)	0.116
50–64	0.93 (0.33–2.16)	0.707	0.69 (0.33–1.41)	0.313	0.17 (0.22–1.01)	0.055
65–79	0.87 (0.36–2.06)	0.756	0.63 (0.29–1.35)	0.24	0.43 (0.20–0.91)	0.029
≥80	0.73 (0.30–1.76)	0.486	0.56 (0.26–1.22)	0.15	0.40 (0.18–0.86)	0.019
Charlson Comorbidity Index
CCI = 0	Referent
CCI = 1	1.46 (1–2.11)	0.044	1.33 (0.96–1.83)	0.078	1.20 (0.87–1.65)	0.261
CCI = 2	1.47 (1.04–2.08)	0.027	1.53 (1.13–2.05)	0.005	1.59 (1.19–2.12)	0.002
CCI ≥ 3	1.9 (1.40–2.57)	<0.001	1.89 (1.46–2.45)	<0.001	2 (1.55–2.58)	<0.001
Hospital Region
Metropolitan	Referent
Micropolitan	1.59 (0.31–7.99)	0.573	1.85 (0.51–6.61)	0.95	1.45 (0.79–1.52)	0.565
Non-urban	-	-	-	-	-	-
Hospital Bed Size
Small	Referent
Medium	0.94 (0.71–1.24)	0.676	0.98 (0.76–1.27)	0.919	0.96 (0.74–1.23)	0.764
Large	0.95 (0.75–1.21)	0.703	0.93 (0.74–1.16)	0.551	0.85 (0.68–1.05)	0.143
Hospital Location and Teaching Status
Metropolitan non-teaching	Referent
Metropolitan teaching	0.87 (0.71–1.07)	0.213	0.88 (0.73–1.06)	0.2	0.89 (0.74–1.07)	0.23
Non-metropolitan	0.39 (0.083–1.90)	0.249	0.39 (0.11–1.34)	0.138	0.49 (0.16–1.49)	0.215
Insurance
Medicare	Referent
Medicaid	0.98 (0.69–1.39)	0.926	1.02 (0.73–1.42)	0.903	1.09 (0.79–1.52)	0.565
Private insurance	0.99 (0.73–1.34)	0.974	0.93 (0.70–1.24)	0.658	0.88 (0.67–1.17)	0.401
Self-pay	1.26 (0.56–2.82)	0.565	0.84 (0.35–2.02)	0.704	0.83 (0.35–1.97)	0.677

aOR: adjusted odds ratio. CI: confidence interval. CCI: Charlson Comorbidity Index.