Heavy lifting at work and risk of ischemic heart disease: protocol for a register-based prospective cohort study.
Harald HannerzAndreas HoltermannPublished in: JMIR research protocols (2014)
Since this is not a randomized study, it cannot confirm etiological hypotheses. It may, however, confirm that employment in occupations that involve heavy lifting is a predictor for IHD and thereby lend support to the hypothesis of a causal relationship.