Work in Brief

Shift work and heart disease Balance of evidence reviews suggest that shift workers are at higher risk of ischae-mic heart disease. However, results from individual studies have not been wholly consistent, a variation that could be explained by bias or confounding. Investigation is hampered by potential healthy hire and survivor effects. Yadegarfar and McNamee have conducted a case-referent study nested within a male industrial cohort from the nuclear fuel industry.1 Over 600 cases who died from ischaemic heart disease were matched on age and year of hire with survivin