Table 4. Effect of MCBS Initial Round Nonresponse Adjustment on Selected Characteristics¹.

Characteristic	Respondents Not Adjusted for Nonresponse				Respondents Adjusted for Nonresponse
	Weight		Difference (R-E)	Statistical Significance	Weight		Difference (R-E)	Statistical Significance
	Poststratification Eligibles (E)	Poststratification Respondents (R)			Poststratification Eligibles (E)	MCBS Initial Nonresponse Respondents (R)
Age (%)
Under 65 Years	13.6	13.9	0.25	*	13.6	13.8	0.17	—
65-74 Years	44.0	43.9	-0.05	—	44.0	44.2	0.18	—
75-84 Years	32.6	32.4	-0.19	—	32.6	32.3	-0.29	—
85 Years or Over	9.9	9.8	-0.01	—	9.9	9.8	-0.06	—
Female (%)	56.6	55.8	-0.76	***	56.6	56.4	-0.19	—
White (%)	86.0	85.6	-0.31	**	86.0	85.7	-0.28	—
Enrolled in Medicaid (%)	12.8	13.4	0.55	***	12.8	13.2	0.38	***
Metropolitan Area Status	72.5	70.2	-2.27	***	72.5	72.0	-0.51	—
Original Reason for Medicare Entitlement: Disability (%)	6.0	6.3	0.23	**	6.0	6.2	0.12	—
Mean HCC-DCG Score2	0.95	0.97	0.02	***	0.95	0.96	0.01	**
Total Medicare Expenditures (Dollars)	4,172	4,309	137	***	4,172	4,257	85	*
% Users	88.5	89.8	1.33	***	89.0	89.4	0.46	—
Expenditure for Inpatient Services (Dollars)	2,025	2,092	67	**	2,025	2,072	47	—
% Users	17.6	18.3	0.66	***	17.6	17.9	0.34	**
Expenditures for Part B Services (Dollars)	1,252	1,285	34	***	1,252	1,273	21	—
% Users	87.9	88.7	0.76	***	87.9	88.3	0.38	—

^*p<0.1.

^**p<0.05.

^***p<0.01.

¹MCBS community, fee-for-service sample. Beneficiaries with end stage renal disease are excluded.

²Diagnosis-based health status index computed from provider bills (claims). A higher hierarchical condition categories-diagnostic cost group (HCC-DCG) score indicates poorer health.

NOTES: MCBS is Medicare Current Beneficiary Survey.

SOURCE: RTI analysis of the 1997-1999 MCBS.