Table 2.

Regression Results for SF-6D Scores

Variable	Coeff.	Std. Err.	P>|t|	[95% Conf. Interval]
Income < $30,000	Ref		0.001*
Income $30,000–$49,999	0.027	0.012	0.018	0.005	0.050
Income $50,000–$74,999	0.046	0.014	0.001	0.019	0.074
Income > $75,000	0.056	0.015	0.000	0.027	0.085
Income Missing	0.020	0.016	0.206	−0.011	0.051
Age (years)	−0.001	0.000	0.005	−0.002	≤0.000
Anastomosis	Ref
Permanent ostomy	−0.008	0.009	0.379	−0.027	0.010
Charlson-Deyo Comorbidity Index	−0.007	0.002	0.006	−0.012	−0.002
Depression (City of Hope), Scaled Item (0 = none at all, 10 = severe)	−0.025	0.002	0.001	−0.0212	−0.028
No complications	Ref		0.043*
Late complications only	−0.024	0.010	0.017	−0.044	−0.004
Early complications only	−0.019	0.015	0.217	−0.050	0.011
Both late and early complications	−0.039	0.021	0.064	−0.081	0.002
Stage localized	Ref		0.016*
Stage regional	0.002	0.009	0.802	−0.015	0.020
Stage distant (metastases)	0.086	0.032	0.008	0.022	0.149
Stage missing	−0.035	0.022	0.111	−0.077	0.008
Prior year hospital days	−0.004	0.001	0.000	−0.006	−0.002
Intercept	0.616	0.036	0.000	0.545	0.686

^*P value for χ² of Likelihood Ratio Test of the vector of indicators as a group.

Adjusted R² = 0.3614

Number of observations = 640 (A total of 19 cases were omitted from this analysis because the respondents did not provide sufficient responses on the SF-36v2 to compute SF-6D scores.)

F(15,624) = 25.11

Prob > F = 0.0000