BPRACTCW
Class of worker at the time repeated activities that caused back pain happened
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For sample persons aged 18 and older who worked last year at a civilian job and who had back pain every day for at least 1 week last year that was caused by repeated activities performed at work, BPRACTCW reports the person's class of employment where the repeated activities that caused his/her back pain were performed.
This variable was included in the 1988 Occupational Health supplement.