Association between air pollution and multiple respiratory hospitalizations among the elderly in Vancouver, Canada.

Abstract:

:Recurrent events, such as repeated hospital admissions for the same health outcome, occur frequently in environmental health studies. In this study, we conducted an analysis of data on repeated respiratory hospitalizations among the elderly in Vancouver, Canada, for the period of June 1, 1995, to March 31, 1999, using a new method proposed by (Dewanji and Moolgavkar 2000, 2002) for recurrent events, and compared it with some traditional methods. In particular, we assessed the impact of ambient gaseous (SO2, NO2, CO, and O3) and particulate pollutants (PM10, PM2.5, and PM10-2.5) as well as the coefficient of haze (CoH) on recurrent respiratory hospital admissions. Using the new procedure, significant associations were found between admissions and 3-day, 5-day, and 7-day moving averages of the ambient SO2 concentrations, with the strongest association observed at the 7-day lag (RR = 1.044, 95% CI: 1.018-1.070). We also found PM10-2.5 for 3-day and 5-day lag to be significant, with the strongest association at 5-day lag (RR = 1.020, 95% CI: 1.001-1.039). No significant associations with admission were found with current day exposure.

journal_name

Inhal Toxicol

journal_title

Inhalation toxicology

authors

Fung KY,Khan S,Krewski D,Chen Y

doi

10.1080/08958370600904538

subject

Has Abstract

pub_date

2006-12-01 00:00:00

pages

1005-11

issue

13

eissn

0895-8378

issn

1091-7691

pii

V90550084627X308

journal_volume

18

pub_type

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