Symptom prevalence and other characteristics of the study cohort by zone and year (n = 2978).
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aParticipants in overlapping area of increased exposure zone and stack zone, entire cohort (2006 = 48; 2007 = 24; 2008 = 15) contributed data to both zones.bComposite variables derived from questionnaire data (see Supporting information, Table S1).cSubjects dEnvironmental tobacco smoke.eIncluded Diploma/TAFE, and participants who responded “Other”.fIncluded participants who refused to respond.
创建时间：
2015-12-02
