TABLE 4.

Number of Unplanned Hospitalizations in Colorectal Cancer: GEE Prediction Models

Predictor	Unadjusted (bivariate) models			Adjusted (multivariate) modela
	Multiplier	95% CI	p	Multiplier	95% CI	p
Sex (female)	1.07	[0.98, 1.17]	.13
Age (yrs)	0.99	[0.99, 1.00]	.55
Race (non-White)	1.13	[1.04, 1.23]	.003	1.19	[1.03, 1.37]	.02
NonHS graduates (%)b	1.02	[0.98, 1.07]	.20
Income (Mdn)b	0.96	[0.92, 1.00]	.09
Urbanizationc
Big metro	0.81	[0.69, 0.96]	.02	0.79	[0.68, 0.93]	.004
Metro/urban	0.79	[0.70, 0.89]	.0002	0.78	[0.71, 0.87]	<.0001
Comorbidityd
0	0.96	[0.86, 1.08]	.55	0.96	[0.85, 1.07]	.45
1	0.99	[0.90, 1.10]	.97	1.01	[0.90, 1.13]	.89
2	1.12	[1.07, 1.16]	<.0001	1.13	[1.09, 1.17]	<.0001
Radiation therapy (yes)	1.04	[0.98, 1.10]	.15	1.06	[1.00, 1.12]	.03
Marital status (married)	1.06	[1.02, 1.10]	.004

Note. N = 333. Outcome was a count variable. 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.

^aQIC = 1889.7619.

^bCensus tract data.

^cReference group is less urban/rural.

^dNCI Combined Index. Reference group is 3+.