Medicare Advantage and Prescription Drug Plan CAHPS® Survey

Other Analytic Information

Individual-Level Weight Construction in MA & PDP CAHPS

Information on construction of individual-level weights in MA & PDP CAHPS can be found here.


Nonresponse Adjustment of the Medicare CAHPS Surveys in Research Papers Using the Individual-Level Weights

Unit response rates followed patterns typical for health surveys (Klein et al., 2011), including higher response rates for non-Hispanic whites than for other racial/ethnic subgroups, better response rates through age 79, and lower response rates for low-income beneficiaries. All analyses used individual-level poststratification weights that account for sample design and nonresponse (Deming and Stephan, 1940; Purcell and Kish, 1980) by matching weighted sample and enrollment populations in each Medicare contract-by-county combination on demographic characteristics, Medicaid eligibility/low-income subsidy enrollment status, enrollment in a Special Needs Plan, and zip-code level distributions of income, education, and race/ethnicity.



Klein DJ, Elliott MN, Haviland AM, et al. Understanding nonresponse to the 2007 Medicare CAHPS survey. Gerontologist. 2011; 51: 843–855.

Deming WE, Stephan FF. On a least squares adjustment of a sampled frequency table when the expected marginal tools are known. Ann Math Stat. 1940; 11: 427–444.

Purcell NJ, Kish L. Postcensal estimates for local areas (or domains). Int Stat Rev. 1980; 48: 3–18.


Summary of Comparison of Linear Mean Scoring with Top-Box Scoring for Medicare CAHPS Measures

Official scoring of Medicare CAHPS is linear mean scoring. A summary that compares linear mean scoring with top-box scoring for Medicare CAHPS measures can be found here. The summary includes median reliabilities for Medicare Advantage contracts calculated from 2017 CAHPS data.


Internet Citation 

Please use the following citation when referencing material on this web site. [] Centers for Medicare & Medicaid Services, Baltimore, MD. Month, Date, Year the page was accessed.


This page was last modified on 1/15/2021