The relationship between shift work and Framingham risk score: A five-year prospective cohort study.

BACKGROUND: There is a small number of studies that considered the relationship between shift work (SW) and Framingham risk score (FRS). This study prospectively examined the association between SW and FRS among man workers based on the multilevel modeling approach.

METHODS: This five-year prospective cohort study was done among workers (using stratified random sampling) who work in Esfahan's Mobarakeh Steel Company (EMSC), Iran, from March 2011 to February 2015.

RESULTS: The study sample included 1626 man workers (mean age = 40.0 ± 6.2). Among these subjects, 652 (40.01%), 183 (11.3%) and 791 (48.6%) were day workers, weekly rotating shift workers and routinely rotating, respectively. After controlling unbalanced variables, there was no any significant association between SW and FRS.

CONCLUSION: The results of this prospective cohort study did not show a relationship between SW and FRS.