Table of Contents

Locator Record

Title: 2005-2006 NHANES Geocoding (N0506_GE )
Contact Number: 1-866-441-NCHS
Years of Content: 2005 - 2006
First Published: May, 2009
Revised: NA
Access Constraints: RDC Only
Use Constraints: RDC Only
Geographic Coverage: National
Subject:Geocoding
Record Source: NHANES 2005 - 2006
Survey Methodology: NHANES 2005 - 2006 is a stratified multistage probability sample of the civilian non-institutionalized population of the U.S.
Medium: NHANES Web site; SAS transport files

Component Description

The current National Health and Nutrition Examination Survey (NHANES) is a continuous program starting in 1999. The survey interviews and examines a nationally representative sample of 5,000 persons each year. These persons are located in counties across the country, 15 of which are visited each year. No geographic location was released in order to protect the identification of respondents for the NHANES survey. State and county information could be obtained through the Research Data Center (RDC). It is desirable, however, to use a finer level of geography to spatially analyze the NHANES data and to answer various important research questions about the effect of geography on health. Therefore, NCHS has asked HUD to geocode (i.e., assign geographic codes to) the NHANES survey data for analytical use in the RDC every two year cycle.

HUD geocoded the 2005-2006 NHANES survey data to the 2000 census.

Specifically, HUD provided:

    1. Census block group, census tract, county, state, and all other census codes normally provided by the HUD Geocoding Service Center for each residential address.
    2. Latitude and longitude for each residential address.

Analytic Notes

2005-2006 NHANES Geocoding Summary:

Input Data Records Read (All SPs): 10,348

Census 2000 RC Values 
"S" Street Match GCP rcds: 9,526 
"9" ZIP+4 Match GCP rcds: 356
"5" ZIP Match GCP rcds: 466
Space (Nomatch) GCP rcds: 0 

Census 2000 LVL Values
"R" "Rooftop" Level rcds: 9,526
"4" ZIP+4 Level records: 43
"B" Block Group LVL records: 313
"T" Tract Level records: 466
"2" ZIP+2 Level records: 0 
"5" ZIP5 Level records: 0 
"Z" ZIP Level records: 0
Space (Nomatch) LVL records: 0

References

Codebook and Frequencies

SEQN - Respondent sequence number

Variable Name:
SEQN
SAS Label:
Respondent sequence number
English Text:
Respondent sequence number.
Target:
Both males and females 0 YEARS - 150 YEARS

RC2K - Census 2000 Geocoder General Return Code

Variable Name:
RC2K
SAS Label:
Census 2000 Geocoder General Return Code
English Text:
Reference census 2000 geocoder return code
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
5 5-digit ZIP Match Successful 466 466
9 9-digit ZIP match Successful 356 822
S Street Address Match 9526 10348
< blank > Missing 0 10348

LVL2K - Census 2000 Lat/Long Geocoding Level

Variable Name:
LVL2K
SAS Label:
Census 2000 Lat/Long Geocoding Level
English Text:
Census 2000 Geocoder Lat/Long Geocoding Level
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 ZIP+2 Centroiod 0 0
4 ZIP+4 Centroid 43 43
5 ZIP5 Centroid 0 43
B Block group Centroid 313 356
R Interpolated Rooftop (Household) 9526 9882
T Census Tract Centroid 466 10348
Z ZIP5 Centroid (same as 5) 0 10348
< blank > Missing 0 10348

LAT - Latitude

Variable Name:
LAT
SAS Label:
Latitude
English Text:
Latitude in decimal format with up to 6 decimal precision
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
29.6568 to 62.4337 Range of Values 10348 10348
. Missing 0 10348

LON - Longitude

Variable Name:
LON
SAS Label:
Longitude
English Text:
Longitude in decimal format with up to 6 decimal precision
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
-150.2182 to -71.3439 Range of Values 10348 10348
. Missing 0 10348

STATE2K - Census 2000 FIPS State Code

Variable Name:
STATE2K
SAS Label:
Census 2000 FIPS State Code
English Text:
Census 2000 FIPS status code
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
2 to 53 Range of Values 10348 10348
. Missing 0 10348

CNTY2K - Census 2000 FIPS County code

Variable Name:
CNTY2K
SAS Label:
Census 2000 FIPS County code
English Text:
Census 2000 FIPS County code
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 610 Range of Values 10348 10348
. Missing 0 10348

TRACT2K - Census 2000 Tract

Variable Name:
TRACT2K
SAS Label:
Census 2000 Tract
English Text:
Census 2000 tract/BNA (leading zeros with the decimal point impiled)
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
100 to 990100 Range of Values 10348 10348
. Missing 0 10348

BG2K - Census 2000 Block Group

Variable Name:
BG2K
SAS Label:
Census 2000 Block Group
English Text:
Census 2000 block group
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1 to 9 Range of Values 9882 9882
. Missing 466 10348

BLOCK2K - Census 2000 block ID

Variable Name:
BLOCK2K
SAS Label:
Census 2000 block ID
English Text:
Census 2000 block ID - first character is the census block group
Target:
Both males and females 0 YEARS - 150 YEARS
Code or Value Value Description Count Cumulative Skip to Item
1000 to 9021 Range of Values 9569 9569
. Missing 779 10348