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Accuracy and repeatability of commercial geocoding.

TitleAccuracy and repeatability of commercial geocoding.
Publication TypeJournal Article
Year of Publication2004
AuthorsWhitsel EA, Rose KM, Wood JL, Henley AC, Liao D, Heiss G
JournalAm J Epidemiol
Date Published2004 Nov 15
KeywordsAged, Air Pollutants, Cardiovascular Diseases, Environmental Monitoring, Epidemiological Monitoring, Geographic Information Systems, Humans, Middle Aged, Reproducibility of Results, Social Class, United States, United States Environmental Protection Agency

The authors estimated accuracy and repeatability of commercial geocoding to guide vendor selection in the Life Course Socioeconomic Status, Social Context and Cardiovascular Disease study (2001-2002). They submitted 1,032 participant addresses (97% in Maryland, Minnesota, Mississippi, or North Carolina) to vendor A twice over 9 months and measured repeatability as agreement between levels of address matching, discordance (%) between statistical tabulation areas, and median distance (d, in meters) and bearing (theta;, in degrees) between coordinates assigned on each occasion (H(o):Sigma(i)( = 1 -->) (n) [theta;(i) /n] = 180 degrees ). They also submitted 75 addresses of nearby air pollution monitors (77% urban/suburban; 69% residential/commercial) to vendors A and B and then measured accuracy by comparing vendor- and US Environmental Protection Agency (EPA)-assigned geocodes using the above measures. Repeatability of geocodes assigned by vendor A was high (kappa = 0.90; census block group discordance = 5%; d

Alternate JournalAm J Epidemiol
PubMed ID15522859
Grant List5-T32-HL07055 / HL / NHLBI NIH HHS / United States
R01-HL64142-03 / HL / NHLBI NIH HHS / United States