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Int J Environ Res Public Health. 2018 Mar 15;15(3). pii: E526. doi: 10.3390/ijerph15030526.

Pesticide Use and Asthma in Alberta Grain Farmers.

Author information

1
Faculty of Medicine, Division of Preventive Medicine, University of Alberta, 5-22 University Terrace, 8303-112 St, Edmonton, AB T6G 1K4, Canada. ncherry@ualberta.ca.
2
Faculty of Medicine, Division of Preventive Medicine, University of Alberta, 5-22 University Terrace, 8303-112 St, Edmonton, AB T6G 1K4, Canada. jeremy.beach@cpsa.ab.ca.
3
School of Public Health, University of Alberta, Edmonton, AB T6G 1C9, Canada. sentil@ualberta.ca.
4
Faculty of Medicine, Division of Preventive Medicine, University of Alberta, 5-22 University Terrace, 8303-112 St, Edmonton, AB T6G 1K4, Canada. ib68@drexel.edu.
5
Dornsife School of Public Health, Drexel University, Philadelphia, PA 19104, USA. ib68@drexel.edu.

Abstract

A study of the respiratory health of grain farmers in Alberta, Canada was carried out in March 2002. Two populations were identified: members, in 1983, of a province-wide farm organisation, and grain farmers registered with the provincial agriculture department. A telephone interview addressed pesticide use (using pre-circulated trade names), chronic disease and respiratory symptoms. Pesticide ingredients were identified from provincial crop protection guides. Total years of use were calculated for seven chemical groups. Consent for linkage to administrative health records was obtained in 2009. A likelihood score (Lscore) is computed, relating symptoms to asthma diagnosis. Self-reported asthma and the Lscore are examined against duration of pesticide exposures. Of the 10,767 farmers listed, 2426 were still living, had farmed grain and were interviewed; 1371 were re-contacted and matched to health records. After allowance for confounders, years of exposure to phenoxy compounds are related to self-reported asthma and Lscore. Compared to no exposure, the adjusted odds ratios (95% Confidence Intervals for self-reported asthma for short, medium and long exposure to phenoxy compounds are 1.29 (0.66-2.52), 2.52 (1.25-5.09), and 3.18 (1.54-6.58), and for Lscore are 1.19 (0.91-1.55), 1.50 (1.13-1.99), and 1.58 (1.18-2.12). We conclude that lifetime exposure to phenoxy herbicides is associated with an increased risk of asthma.

KEYWORDS:

administrative health records; asthma; grain farming; likelihood score; pesticides; phenoxy herbicides

PMID:
29543740
PMCID:
PMC5877071
DOI:
10.3390/ijerph15030526
[Indexed for MEDLINE]
Free PMC Article

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