Alternative Approaches to Approximate an Analytic Sample


This module provides an in depth description of alternative approaches to approximate an analytic sample size of NHANES participants who linked to the CMS data file.


Task 1: Locate the Match Rate Tables for NHANES-CMS Linked Data

This task will provide information on the location of the NHANES-CMS linked data match rate tables. The match rate tables are provided for researchers wanting an estimate of sample sizes.

Task 2: Locate the Sample Count Tables to Approximate an Analytic Sample Size

The sample count tables are another resource that can be used to estimate potential sample sizes by providing the number of NHANES participants in each CMS file. This task will show you how to calculate an approximate analytic sample size for your research.

Task 3: Locate the Managed Care Enrollment Table for NHANES-CMS Linked Data

When estimating sample sizes for analyses involving CMS claims data, it is important to consider the NHANES-CMS linked participants enrolled in Medicare Advantage (MA) and/or Medicaid managed care plans. MA, also referred to as Medicare Part C, includes Health Maintenance Organizations (HMOs), Managed Care Plans, Preferred Provider Organizations (PPOs), Private Fee-for-Service (PFFS) Plans, Special Needs Plans, and Medicare Medical Savings Account Plans. Until recently, CMS generally did not receive claims data for Medicare beneficiaries who enrolled in MA plans. For enrollees in Medicaid managed care plans, information in the Medicaid Analytic eXtract (MAX) files are limited and the availability varies by state. This task identifies NCHS resources that will enable you approximate the number of beneficiaries enrolled in a MA and Medicaid managed care plan.