TY - JOUR T1 - Night and rotational work exposure within the last 12 months and risk of incident hypertension JO - Scandinavian Journal of Work, Environment & Health PY - 2019/5VL - 45 IS - 3 SP - 256 EP - 266 AU - Ferguson, Jacqueline M AU - Costello, Sadie AU - Neophytou, Andreas M AU - Balmes, John R AU - Bradshaw, Patrick T AU - Cullen, Mark R AU - Eisen, Ellen A M3 - doi: 10.5271/sjweh.3788 UR - https://www.sjweh.fi/show_abstract.php?abstract_id=3788 KW - exposure KW - hypertension KW - incident hypertension KW - longitudinal KW - night work KW - occupational health KW - occupational health KW - rotational work KW - shift rotation KW - shift work KW - shift worker KW - time-registry KW - working time N2 - '

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OBJECTIVES ': 'Shift work, such as alternating day and nights, causes chronobiologic disruptions which may cause an increase in hypertension risk. However, the relative contributions of the components of shift work ‒ such as shift type (eg, night work) and rotations (ie, switching of shift times; day to night) ‒ on this association are not clear. To address this question, we constructed novel definitions of night work and rotational work and assessed their associations with risk of incident hypertension.

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METHODS ': 'A cohort of 2151 workers at eight aluminum manufacturing facilities previously studied for cardiovascular disease was followed from 2003 through 2013 for incident hypertension, as defined by ICD-9 insurance claims codes. Detailed time-registry data was used to classify each worker’s history of rotational and night work. The associations between recent rotational work and night work in the last 12 months and incident hypertension were estimated using adjusted Cox proportional hazards models.

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RESULTS ': 'Elevated hazard ratios (HR) were observed for all levels of recent night work (>0–5, >5–50, >50–95, >95–100%) compared with non-night workers, and among all levels of rotational work (<1, 1–10, >10–20, >20–30, and >30%) compared with those working <1% rotational work. In models for considering the combination of night and rotational work, workers with mostly night work and frequent rotations (≥50% night and ≥10% rotation) had the highest risk of hypertension compared to non-night workers [HR 4.00, 95% confidence interval (CI )1.69–9.52].

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CONCLUSIONS ': 'Our results suggest recent night and rotational work may both be associated with higher rates of incident hypertension.

SN - 0355-3140 ER -