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February 6, 1987

Chest Pain in Users of Video Display Terminals-Reply

Author Affiliations

University of North Carolina Chapel Hill

University of North Carolina Chapel Hill

JAMA. 1987;257(5):628. doi:10.1001/jama.1987.03390050053015

In Reply.—  We are pleased to comment on the reanalysis of our data by Schnorr et al confirming the relationship of VDT use to chest pain among North Carolina telecommunications workers. Unfortunately, they have incorrectly summarized our reported findings.1 Our investigation was restricted to 519 women employed as office workers, in contrast to the 827 subjects analyzed by Schnorr et al, which included both office workers and non—office workers. Chest pain symptomatology was classified by the London School of Hygiene Rose angina questionnaire.2 We reported a twofold greater prevalence of angina among VDT users compared with nonusers (15.2% vs 7.7% [P =.01]), with VDT users defined as those using the VDT during half or more of their workday. We believe the lower prevalence rates reported by Schnorr et al (10.9% and 6.5% among VDT users and nonusers, respectively) are due to their inclusion of non—office workers in the