Alternative Approaches to Approximate an Analytic Sample

Purpose

This module provides an in depth description of alternative approaches to approximate an analytic sample size of NHANES respondents who linked to the CMS data file, using multiple sources.

Task 1: Locate Number of NHANES Respondents Who Linked to CMS Administrative Records

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

• Introduction
• Medicare
• Medicaid

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

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

• Introduction
• Medicare
• Medicaid

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

When estimating sample sizes for analyses involving CMS claims data, it is important to consider subtracting the NHANES-CMS linked participants enrolled in Medicare Part C plans. Medicare Part C plans are also referred to as Medicare Advantage (MA) and include 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. CMS generally does not receive claims data for Medicare beneficiaries who enroll in Medicare Part C plans. This task identifies NCHS resources that will enable you approximate the number of beneficiaries enrolled in a Medicare Part C plan.

• Introduction
• Medicare