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Definition
 
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Census Tract definition: Relatively permanent statistical subdivisions of a county used by the U.S. Bureau of the Census for purposes of population enumeration. Each tract has a unique identification number consisting of a 4-digit basic number and a 2-digit suffix of the form 1234.56.
census tract definition: A geographic sub-unit delineated for demographic purposes.
 
Examples
 

However, for workers within the same census tract, variations were observed in the partial exposure estimates associated with time spent outside the residential census tract.

Eleanor M Setton et al.

International Journal of Health Geographics 7 (7), 18 Jul 2008

Simulation modeling shows that some workers may have exposures 1.3 times higher than other workers residing in the same census tract because of time spent away from the residential census tract, and that time spent in work census tracts contributes most to the differences in exposure.

Eleanor M Setton et al.

International Journal of Health Geographics 7 (7), 18 Jul 2008

The results suggest that while time spent in the home indoor microenvironment contributes most to between-census tract variation in estimates of annual average exposures to traffic-related NO 2 , time spent in the work indoor microenvironment contributes most to within-census tract variation, and time spent in transit by vehicle makes a negligible contribution.

Eleanor M Setton et al.

International Journal of Health Geographics 7 (7), 18 Jul 2008

In the SESM, this same pool of time-activity patterns is used for the simulation in each census tract, thus controlling for variation due to demographic differences.

Eleanor M Setton et al.

International Journal of Health Geographics 7 (7), 18 Jul 2008

2) Work flow data for all people aged 15 and over reporting employment, based on a 20 percent sample in each census tract on May 15 th , 2001, were purchased from Statistics Canada.

Eleanor M Setton et al.

International Journal of Health Geographics 7 (7), 18 Jul 2008

28 further examples >>
Publications
 

Spatial variations in estimated chronic exposure to traffic-related air pollution in working populations: A simulation: ... aggregated at the census tracts level for 382 census tracts in the Greater Vancouver Regional District of British Columbia, Canada. Summary statistics relating to the distributions of the estimated exposures are compared visually through mapping. Observed variations are explored through analyses of model inputs. Results Two sources of spatial variability in exposure to traffic-related nitrogen dioxide were identified. Median estimates of total exposure ranged from 8 μg/m 3 to 35 μg/m 3 of annual average hourly NO 2 for workers in different census tracts in the study area. Exposure estimates are highest where ambient pollution levels are highest. This reflects the regional gradient of pollution in the study area and the relatively high percentage of time spent at home locations. However, for workers within the same census tract, variations were ...

Eleanor M Setton et al.

International Journal of Health Geographics , 18 Jul 2008

Geographic bias related to geocoding in epidemiologic studies: ... The patterns of missing census tract identifiers for the ...

M Norman Oliver et al.

International Journal of Health Geographics , 10 Nov 2005

Lumping or splitting: seeking the preferred areal unit for health geography studies: ... finer than the census tract may not be compelling.

David I Gregorio et al.

International Journal of Health Geographics , 23 Mar 2005

Disparities in surgical treatment of early-stage non-small-cell lung cancer.: ... who resided in a census tract in the highest ...

A. P. Polednak

The Yale Journal of Biology and Medicine , 2001

Estimating the accuracy of geographical imputation: ... geographies such as a census tract. Assignment is commonly ...

Kevin A Henry et al.

International Journal of Health Geographics , 23 Jan 2008

The neighborhood food environment: sources of historical data on retail food stores: ... food store counts per census tract between the SBOE and ...

May C Wang et al.

The International Journal of Behavioral Nutrition and Physical Activity , 17 Jul 2006

Geographic prediction of tuberculosis clusters in Fukuoka, Japan, using the space-time scan statistic: ... were geocoded at the census tract level (n = 109) based ...

Daisuke Onozuka et al.

BMC Infectious Diseases , 11 Apr 2007

Socioeconomic status and hospitalization in the very old: a retrospective study: ... level of income in the census tract of residence were ...

Raffaele Antonelli-Incalzi et al.

BMC Public Health , 31 Aug 2007

Spatial and temporal patterns of enzootic raccoon rabies adjusted for multiple covariates: ... described at a focal (census tract) level. Comparisons ...

Sergio Recuenco et al.

International Journal of Health Geographics , 11 Apr 2007

Barriers to self-monitoring of blood glucose among adults with diabetes in an HMO: A cross sectional study: ... records and 1990 census tract data. Results In ...

Alyce S Adams et al.

BMC Health Services Research , 19 Mar 2003

23 further publications >>