Table of Contents

Locator Record

Title: 2009-2010 Gecoding (N0910_GE )
Contact Number: 1-866-441-NCHS
Years of Content: 2009 - 2010
First Published: February, 2012
Revised: NA
Access Constraints: RDC Only
Use Constraints: RDC Only
Geographic Coverage: National
Subject:Geocoding
Record Source: NHANES 2009 - 2010
Survey Methodology: NHANES 2009 - 2010 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 2009-2010 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.

Quality Assurance & Quality Control

2009-2010 NHANES Geocoding Summary:

Input Data Records Read (All SPs): 10,534

 Census 2000 RC Values          Count  %
 "S" Street Match GCP rcds  9173  92.2
 "9" ZIP+4 Match GCP rcds  608  5.8
 "5" ZIP Match GCP rcds  213  2.0
 Space (Nomatch) GCP rcds  0  0

 

 Census 2000 LVL Values    Count % 
 "R" "Rooftop" Level rcds  9713  92.2
 "4" ZIP+4 Level records  222  2.1
 "B" Block Group LVL records  386  3.7
 "T" Tract Level records  213  2.0
 "2" ZIP+2 Level records  0  0
 "5" ZIP5 Level records  0  0
 "Z" ZIP Level records  0  0
 Space (Nomatch) LVL records  0  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 213 213
9 9-digit ZIP match Successful 608 821
S Street Address Match 9713 10534
< blank > Missing 0 10534

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 222 222
5 ZIP5 Centroid 0 222
B Block group Centroid 386 608
R Interpolated Rooftop (Household) 9713 10321
T Census Tract Centroid 213 10534
Z ZIP5 Centroid (same as 5) 0 10534
< blank > Missing 0 10534

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
26.711168 to 46.706432 Range of Values 10534 10534
. Missing 0 10534

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
-122.749507 to -71.418526 Range of Values 10534 10534
. Missing 0 10534

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
4 to 55 Range of Values 10534 10534
. Missing 0 10534

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 740 Range of Values 10534 10534
. Missing 0 10534

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 985500 Range of Values 10534 10534
. Missing 0 10534

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 10321 10321
. Missing 213 10534

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 9039 Range of Values 9935 9935
. Missing 599 10534