Examination of how neighborhood definition influences measurements of youths' access to tobacco retailers: A methodological note on spatial misclassification

Dustin Duncan, Ichiro Kawachi, S. V. Subramanian, Jared Aldstadt, Steven J. Melly, David R. Williams

Research output: Contribution to journalArticle

Abstract

Measurements of neighborhood exposures likely vary depending on the definition of "neighborhood" selected. This study examined the extent to which neighborhood definition influences findings regarding spatial accessibility to tobacco retailers among youth. We defined spatial accessibility to tobacco retailers (i.e., tobacco retail density, closest tobacco retailer, and average distance to the closest 5 tobacco retailers) on the basis of circular and network buffers of 400 m and 800 m, census block groups, and census tracts by using residential addresses from the 2008 Boston Youth Survey Geospatial Dataset (n = 1,292). Friedman tests (to compare overall differences in neighborhood definitions) were applied. There were differences in measurements of youths' access to tobacco retailers according to the selected neighborhood definitions, and these were marked for the 2 spatial proximity measures (both P < 0.01 for all differences). For example, the median average distance to the closest 5 tobacco retailers was 381.50 m when using specific home addresses, 414.00 m when using census block groups, and 482.50 m when using census tracts, illustrating how neighborhood definition influences the measurement of spatial accessibility to tobacco retailers. These analyses suggest that, whenever possible, egocentric neighborhood definitions should be used. The use of larger administrative neighborhood definitions can bias exposure estimates for proximity measures.

Original languageEnglish (US)
Pages (from-to)373-381
Number of pages9
JournalAmerican Journal of Epidemiology
Volume179
Issue number3
DOIs
StatePublished - Feb 2014

Fingerprint

Tobacco
Censuses
Buffers

Keywords

  • exposure science
  • modifiable areal unit problem
  • neighborhood
  • spatial scale
  • spatial zone
  • tobacco retailers
  • uncertain geographic context problem

ASJC Scopus subject areas

  • Epidemiology

Cite this

Examination of how neighborhood definition influences measurements of youths' access to tobacco retailers : A methodological note on spatial misclassification. / Duncan, Dustin; Kawachi, Ichiro; Subramanian, S. V.; Aldstadt, Jared; Melly, Steven J.; Williams, David R.

In: American Journal of Epidemiology, Vol. 179, No. 3, 02.2014, p. 373-381.

Research output: Contribution to journalArticle

Duncan, Dustin ; Kawachi, Ichiro ; Subramanian, S. V. ; Aldstadt, Jared ; Melly, Steven J. ; Williams, David R. / Examination of how neighborhood definition influences measurements of youths' access to tobacco retailers : A methodological note on spatial misclassification. In: American Journal of Epidemiology. 2014 ; Vol. 179, No. 3. pp. 373-381.
@article{fec03b51e3154606b15694a661946774,
title = "Examination of how neighborhood definition influences measurements of youths' access to tobacco retailers: A methodological note on spatial misclassification",
abstract = "Measurements of neighborhood exposures likely vary depending on the definition of {"}neighborhood{"} selected. This study examined the extent to which neighborhood definition influences findings regarding spatial accessibility to tobacco retailers among youth. We defined spatial accessibility to tobacco retailers (i.e., tobacco retail density, closest tobacco retailer, and average distance to the closest 5 tobacco retailers) on the basis of circular and network buffers of 400 m and 800 m, census block groups, and census tracts by using residential addresses from the 2008 Boston Youth Survey Geospatial Dataset (n = 1,292). Friedman tests (to compare overall differences in neighborhood definitions) were applied. There were differences in measurements of youths' access to tobacco retailers according to the selected neighborhood definitions, and these were marked for the 2 spatial proximity measures (both P < 0.01 for all differences). For example, the median average distance to the closest 5 tobacco retailers was 381.50 m when using specific home addresses, 414.00 m when using census block groups, and 482.50 m when using census tracts, illustrating how neighborhood definition influences the measurement of spatial accessibility to tobacco retailers. These analyses suggest that, whenever possible, egocentric neighborhood definitions should be used. The use of larger administrative neighborhood definitions can bias exposure estimates for proximity measures.",
keywords = "exposure science, modifiable areal unit problem, neighborhood, spatial scale, spatial zone, tobacco retailers, uncertain geographic context problem",
author = "Dustin Duncan and Ichiro Kawachi and Subramanian, {S. V.} and Jared Aldstadt and Melly, {Steven J.} and Williams, {David R.}",
year = "2014",
month = "2",
doi = "10.1093/aje/kwt251",
language = "English (US)",
volume = "179",
pages = "373--381",
journal = "American Journal of Epidemiology",
issn = "0002-9262",
publisher = "Oxford University Press",
number = "3",

}

TY - JOUR

T1 - Examination of how neighborhood definition influences measurements of youths' access to tobacco retailers

T2 - A methodological note on spatial misclassification

AU - Duncan, Dustin

AU - Kawachi, Ichiro

AU - Subramanian, S. V.

AU - Aldstadt, Jared

AU - Melly, Steven J.

AU - Williams, David R.

PY - 2014/2

Y1 - 2014/2

N2 - Measurements of neighborhood exposures likely vary depending on the definition of "neighborhood" selected. This study examined the extent to which neighborhood definition influences findings regarding spatial accessibility to tobacco retailers among youth. We defined spatial accessibility to tobacco retailers (i.e., tobacco retail density, closest tobacco retailer, and average distance to the closest 5 tobacco retailers) on the basis of circular and network buffers of 400 m and 800 m, census block groups, and census tracts by using residential addresses from the 2008 Boston Youth Survey Geospatial Dataset (n = 1,292). Friedman tests (to compare overall differences in neighborhood definitions) were applied. There were differences in measurements of youths' access to tobacco retailers according to the selected neighborhood definitions, and these were marked for the 2 spatial proximity measures (both P < 0.01 for all differences). For example, the median average distance to the closest 5 tobacco retailers was 381.50 m when using specific home addresses, 414.00 m when using census block groups, and 482.50 m when using census tracts, illustrating how neighborhood definition influences the measurement of spatial accessibility to tobacco retailers. These analyses suggest that, whenever possible, egocentric neighborhood definitions should be used. The use of larger administrative neighborhood definitions can bias exposure estimates for proximity measures.

AB - Measurements of neighborhood exposures likely vary depending on the definition of "neighborhood" selected. This study examined the extent to which neighborhood definition influences findings regarding spatial accessibility to tobacco retailers among youth. We defined spatial accessibility to tobacco retailers (i.e., tobacco retail density, closest tobacco retailer, and average distance to the closest 5 tobacco retailers) on the basis of circular and network buffers of 400 m and 800 m, census block groups, and census tracts by using residential addresses from the 2008 Boston Youth Survey Geospatial Dataset (n = 1,292). Friedman tests (to compare overall differences in neighborhood definitions) were applied. There were differences in measurements of youths' access to tobacco retailers according to the selected neighborhood definitions, and these were marked for the 2 spatial proximity measures (both P < 0.01 for all differences). For example, the median average distance to the closest 5 tobacco retailers was 381.50 m when using specific home addresses, 414.00 m when using census block groups, and 482.50 m when using census tracts, illustrating how neighborhood definition influences the measurement of spatial accessibility to tobacco retailers. These analyses suggest that, whenever possible, egocentric neighborhood definitions should be used. The use of larger administrative neighborhood definitions can bias exposure estimates for proximity measures.

KW - exposure science

KW - modifiable areal unit problem

KW - neighborhood

KW - spatial scale

KW - spatial zone

KW - tobacco retailers

KW - uncertain geographic context problem

UR - http://www.scopus.com/inward/record.url?scp=84892752522&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84892752522&partnerID=8YFLogxK

U2 - 10.1093/aje/kwt251

DO - 10.1093/aje/kwt251

M3 - Article

C2 - 24148710

AN - SCOPUS:84892752522

VL - 179

SP - 373

EP - 381

JO - American Journal of Epidemiology

JF - American Journal of Epidemiology

SN - 0002-9262

IS - 3

ER -