O6C.1 Ischaemic heart disease and occupation: a linkage between two new zealand surveys and the integrated data infrastructure
BackgroundAssociations between ischaemic heart disease (IHD) and occupation are poorly understood. We linked two previously conducted New Zealand workforce surveys with routinely collected health data to assess occupational risk factors of IHD in New Zealand.MethodsTwo probability-based sample surveys of the general New Zealand adult population (2004–2006; n=3003) and of the New Zealand indigenous peoples (M&_x0101;ori; 2009–2010; n=2107), for which occupational history was collected, were linked with health data up to the end of 2017 using Statistics New Zealand individual-level microdata. Incident IHD events were identified using hospitalisations, prescriptions and deaths. The odds ratios associated with ever being employed in occupational groups were estimated by logistic regression adjusting for age, smoking and socio-economic status separately for males and females in each cohort.ResultsA total of 282 IHD cases were identified in both surveys. Statistically significant elevated IHD risks were observed for male clerks in the general survey (OR=1.60, 95%CI=1.02–2.49) and agriculture and fishery male workers in the M&_x0101;ori survey (OR=1.70, 95%CI=1.02–2.82). Among females, the odds ratios for agriculture and fishery workers were 1.69 (95%CI=0.81–3.51) and 1.49 (95%CI=0.81–2.75) in the general survey and the M&_x0101;ori survey, respectively. A statistically significant increased risk was observed for female plant and machine operators and assemblers in the M&_x0101;ori survey (OR=1.87, 95%CI=1.05–3.31). In the general survey, male plant and machine operators and assemblers had an odds ratio of 1.26 (95%CI=0.81–1.95). We also identified borderline increased odds ratios for trades workers among males in the general survey (OR=1.39, 95%CI=0.92–2.12, p-value=0.12) and among females in the M&_x0101;ori survey (OR=2.26, 95%CI=0.98–5.21, p-value=0.06).ConclusionThis study identified associations between several occupational groups and IHD in the New Zealand population. Further analyses will be conducted to assess specific occupational exposures associated with IHD risk.