Who is the MCBS sample?
Respondents for the MCBS were samples from the Medicare enrollment file to be representative of the Medicare population as a whole and by age group: Under 45, 45 to 64, 65 to 69, 70 to 74, 75 to 79, 80 to 84, and 85 and Older. Because of interest in their special health care needs, the oldest old (85 and over) and the disable (64 and under) were oversampled to permit detailed analysis of these subpopulations.
