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Extended work hours and risk of acute occupational injury: A case‐crossover study of workers in manufacturing
Author(s) -
Vegso S.,
Cantley L.,
Slade M.,
Taiwo O.,
Sircar K.,
Rabinowitz P.,
Fiellin M.,
Russi M.B.,
Cullen M.R.
Publication year - 2007
Publication title -
american journal of industrial medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.7
H-Index - 104
eISSN - 1097-0274
pISSN - 0271-3586
DOI - 10.1002/ajim.20486
Subject(s) - medicine , occupational injury , logistic regression , conditional logistic regression , overtime , crossover study , case control study , working hours , emergency medicine , injury prevention , poison control , placebo , alternative medicine , pathology , political science , law , labour economics , economics
Abstract Objective This study was designed to determine whether injury risk among manufacturing workers was related to hours worked during the previous week. Methods A case‐crossover design was utilized to contrast hours worked prior to an injury shift with those worked prior to a non‐injury shift for hourly workers. Paired t‐tests were used to determine significance of the difference. Conditional logistic regression was used to assess dose–response. Results Hours worked prior to injury significantly exceeded hours during the control week. Workers who worked more than 64 hr in the week before the shift had an 88% excess risk compared to those who worked 40 hr or fewer, P < 0.05. Conclusion The study provides evidence that injury risk is related to time worked during the previous week. Control of overtime in manufacturing may reduce risk of worker injury. Am. J. Ind. Med. 50:597–603, 2007. © 2007 Wiley‐Liss, Inc.