Master ID File

The CHNS Master ID File contains a single observation for every individual who ever participated in a CHNS Survey. It contains their more current household (HHID) and individual (LINE) ID, their date of birth as a lunar and western date, their gender, and previous IDs (HHID/LINE) if they have participated as members of different households.

This file was created using the 1993 CHNS Master as a baseline and using data from 1997 through 2006 to make additions and/or corrections. This file will be updated as more data is reviewed and as more data becomes available such as the 2006 CHNS Survey Data.

Special Note:

A major difference in the new longitudinal files is that all Household ID's have been expanded from 7 to 9 digits. This was done to expand the Neighborhood/Village identifier (T4) from 1 to 2 digits and to expand the Household identifier (T5) from 2 to 3 digits. All CHNS longitudinal files that have 2004 data will have a 6-digit Community ID and a 9-digit Household ID.

Information on Those Who Have Died

Information has been added regarding those whose deaths have been reported in one or more surveys. In the 55 cases where a death has been reported more than once, the first reported date is assumed to be the most accurate (unless missing) since it is the closest survey to the death.

Nationality

The Nationality variable was created from variables AA7A, AA19A, AB2A, AC9 or AD7 and has been added to the Master ID file.

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