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Am J Ind Med. 2007 Aug;50(8):597-603.

Extended work hours and risk of acute occupational injury: A case-crossover study of workers in manufacturing.

Author information

1
Yale Occupational and Environmental Medicine Program, Department of Internal Medicine, Yale University School of Medicine, New Haven, Connecticut, USA.

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.

PMID:
17594716
DOI:
10.1002/ajim.20486
[Indexed for MEDLINE]

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