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Table 2 Description of longitudinal general population cohort studies of asthma published June 1999–2007 in which the population attributable risk (PAR) for occupational exposures and asthma was either published or can be derived.

From: Asthma caused by occupational exposures is common – A systematic analysis of estimates of the population-attributable fraction

Ref Subject n Case n Country Asthma Definition Occupational Exposure PAR
19 59,058 588 Israel Physician-diagnosed Military exposures: Combat or maintenance versus clerical 44%*
20 1,852,848 49,575 Finland Incident asthma symptoms and at least one criteria of airway reversibility Occupations at baseline a priori classified as exposed 29% men, 17% women, weighted 22%
21 2,723, 101 Norway Physician-diagnosed incident asthma Self-reported exposure to much dust or fumes at baseline 14%
22 52,325 1,426 Singapore Adult-onset physician-diagnosed asthma Occupations at baseline a priori classified as exposed to: I: dust, II:smoke, III: vapors I – 2.7%*, II – 1.7%*, III – 4.2%*, cumulative 8.6%
23 6,837 133 3,994 38 International A. Incident asthma symptoms or medication B. Incident asthma symptoms or medication and new hyperesponsiveness I. Exposure to high-risk substances (at baseline and during follow-up) by job-exposure matrix II. Occupations a priori classified as exposed AI – 11%, AII – 1.7%, BI – 23%, BII – 26%, mean 18.5%*
24 5,933 271 Sweden Physician-diagnosed asthma Manual workers in industry 9%
  1. * Derived from published data
  2. † Population for analysis excluded subjects with asthma at baseline, see reference 25
  3. ‡ The actual study population was less after excluding those with baseline asthma