JSM 2004 - Toronto

Abstract #301806

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Activity Number: 69
Type: Topic Contributed
Date/Time: Monday, August 9, 2004 : 8:30 AM to 10:20 AM
Sponsor: Section on Survey Research Methods
Abstract - #301806
Title: Application of MASSC to Confidentiality Protection of NCHS-NHIS Data
Author(s): Feng Yu*+ and George H. Dunteman and Lanting Dai
Companies: RTI International and RTI International and RTI International
Address: 3040 Cornwallis Rd., RTP, NC, 27709,
Keywords: disclosure risk ; information loss ; MASSC ; NHIS ; SDL
Abstract:

The National Health Interview Survey (NHIS), conducted by NCHS, provides information on health related outcomes in sampled families and individuals. Protecting confidentiality of families and individuals in the family is of great concern in releasing public use files (PUFs), since they contain information on confidential health-related characteristics. We illustrate how MASSC can be used to create PUFs by viewing the existing 2000 NHIS PUF as the original dataset to protect confidentiality of sampled households as well as persons within the household. The disclosure procedure covers the entire process of Micro Agglomeration, Substitution, Subsampling, and Calibration under the MASSC frame work. MASSC ensures that there is control on bias and variance due to treatment while disclosure cost is minimized. The analysis weights are calibrated to the full sample-weighted totals for various subpopulations to improve precision of the estimates for health behaviors across domains. Both confidentiality and analytical diagnostics are presented before and after MASSC treatment of the data.

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