TABLE 3.

Initial Unplanned Hospitalization in Colorectal Cancer Treatment: GEE Prediction Models

Predictor	Bivariatea			Multivariateb,c
	OR	95% CI	p	OR	95% CI	p
Sex (female)	1.95	[1.48, 2.57]	<.0001	2.27	[1.83, 2.81]	<.0001
Age (yrs)	0.94	[0.92, 0.96]	<.0001	0.94	[0.92, 0.96]	<.0001
Race (non-White)	0.83	[0.59, 1.18]	.30	0.77	[0.48, 1.25]	.29
NonHS graduates (%)d	1.02	[1.01, 1.03]	<.0001	0.94	[0.88, 0.99]	.03
Income (Mdn)d	0.95	[0.94, 0.96]	<.0001	0.94	[0.90, 0.99]	.03
Urbanizatione
Big Metro	0.60	[0.52, 0.69]	<.0001	0.68	[0.58, 0.80]	<.0001
Metro/urban	0.54	[0.52, 0.57]	<.0001	0.58	[0.56, 0.60]	<.0001
Comorbidityf
0	0.26	[0.14, 0.48]	<.0001	0.22	[0.10, 0.46]	<.0001
1	0.38	[0.26, 0.58]	<.0001	0.36	[0.21, 0.61]	.0002
2	0.64	[0.35, 1.17]	.15	0.58	[0.27, 1.12]	.10
Radiation therapy (yes)	0.75	[0.54, 1.04]	.08
Marital status (married)	0.93	[0.65, 1.33]	.69

Note. N = 1485. CI = confidence interval; GEE = generalized estimating equations; HS = high school; Mdn = median; NCI = National Cancer Institute; OR = odds ratio; QIC = quasi-likelihood under independence model.

^aUnadjusted models.

^bAdjusted model.

^cQIC = 1464.6376.

^dCensus tract data.

^eReference group is less urban/rural.

^fNCI Combined Index. Reference group is 3+.