Proxy and patient reports of health-related quality of life in a national cancer survey

Table 2 Proxy-patient differences for health-related quality of life outcomes

Model type	Physical Composite Scale Score					Mental Composite Scale Score
	N	R²	95% CI	Coefficient	95% CI	N	R²	95% CI	Coefficient	95% CI
Unadjusted (proxy variable as sole covariate)	6422	0.04	0.04–0.05	−6.65	−7.42 to −5.88	6422	0.03	0.03–0.04	−5.96	−6.74 to −5.19
Full casemix model, minus comorbidities and recent hospitalization	6422	0.12	0.12–0.13	−6.32	−7.13 to −5.53	6422	0.09	0.08–0.09	−6.54	−7.36 to −5.72
Full casemix model with comorbidities, minus recent hospitalization	6422	0.16	0.15–0.18	−5.83	−6.61 to −5.04	6422	0.16	0.15–0.17	−5.85	−6.64 to −5.05
Full casemix model	6422	0.17	0.16–0.18	−5.79	−6.57 to −5.00	6422	0.16	0.15–0.17	−5.83	−6.62 to −5.03
Full casemix model, without unstaged patients^a	6087	0.17	0.16–0.18	−5.62	−6.43 to −4.81	6087	0.16	0.15–0.17	−5.54	−6.36 to −4.73
Full casemix model plus wealth	6422	0.18	0.17–0.19	−5.72	−6.51 to −4.94	6422	0.17	0.16–0.18	−5.77	−6.56 to −4.98
Full casemix model plus survey timing^b	6420	0.17	0.16–0.18	−5.92	−6.71 to −5.13	6420	0.16	0.15–0.17	−5.87	−6.67 to −5.07

^aN = 335 individuals in the analytic cohort were unstaged; ^bN = 2 individuals had missing survey timing information and therefore N = 6420 were included in this analysis

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