@article{ref1,
title="Back Injury Trajectories in Heavy Industries: Defining Outcomes for Epidemiological Research",
journal="Journal of Occupational and Environmental Medicine",
year="2010",
author="Koehoorn, Mieke and Xu, Feng and Village, Judy and Trask, Catherine and Teschke, Kay",
volume="52",
number="9",
pages="908-912",
abstract="OBJECTIVE:: To propose an incidence definition of back injury for epidemiologic studies using health care contacts. METHODS:: Medical services, hospitalizations, and workers' compensation data were linked for a longitudinal database of health care contacts among a cohort of heavy-industry workers for trajectory, group-based analysis. RESULTS:: During follow-up, 25.8% of workers had no health care contacts for back injury. Among workers with at least one contact, four trajectories were identified: one with a high probability of back injury during follow-up and three with episodic trajectories of increasing and decreasing probability of back injury. CONCLUSIONS:: Workers with no back injury history could be followed for incidence in cohort studies or as controls in case-control designs. Episodic groups could be followed for new episodes, providing they were free of health care contacts for back injury for at least 3 years.<p /> <p>Language: en</p>",
language="en",
issn="1076-2752",
doi="10.1097/JOM.0b013e3181f02806",
url="http://dx.doi.org/10.1097/JOM.0b013e3181f02806"
}