Daily self-reports resulted in information bias when assessing exposure duration to computer use.

American Journal of Industrial Medicine
Che-Hsu Joe ChangJack T Dennerlein

Abstract

Self-reported exposure duration to computer use is widely used in exposure assessment, and this study examined the associated information bias in a repeated measures setting. For 3 weeks, 30 undergraduate students reported daily cumulative computer-use duration and musculoskeletal symptoms at four random times per day. Usage-monitor software installed onto participant's personal computers provided the reference measure. We compared daily self-reported and software-recorded duration, and modeled the effect of musculoskeletal symptoms on observed differences. The relationships between daily self-reported and software-recorded computer-use duration varied greatly across subject with Spearman's correlations ranging from -0.22 to 0.8. Self-reports generally overestimated computer use when software-recorded durations were less than 3.6 hr, and underestimated when above 3.6 hr. Experiencing symptoms was related to a 0.15-hr increase in self-reported duration after controlling for software-recorded duration. Daily self-reported computer-use duration had a weak-to-moderate correlation with software-recorded duration, and their relationship changed slightly with musculoskeletal symptoms. Self-reports resulted in both non-differential and...Continue Reading

References

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Jun 28, 2006·Journal of Occupational Rehabilitation·Fred GerrMichele Marcus
Nov 11, 2006·Occupational and Environmental Medicine·S IJmkerP M Bongers
Mar 28, 2007·Occupational and Environmental Medicine·Sigurd MikkelsenJohan Hviid Andersen
Apr 24, 2007·American Journal of Industrial Medicine·Che-Hsu Joe ChangJack Tigh Dennerlein
Jan 22, 2008·Journal of Occupational Rehabilitation·Cammie Chaumont MenéndezJeffrey N Katz
Oct 22, 2008·Journal of Occupational and Environmental Hygiene·Che-Hsu ChangJack T Dennerlein
Jun 30, 2009·Scandinavian Journal of Work, Environment & Health·Lope H BarreroJack T Dennerlein

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Citations

May 25, 2011·International Archives of Occupational and Environmental Health·Sigurd MikkelsenJohan Hviid Andersen
Jul 3, 2013·American Journal of Industrial Medicine·Linda Delp, Pin-Chieh Wang
Dec 2, 2014·Journal of Occupational and Environmental Hygiene·Sophia BeroloRichard P Wells
Dec 12, 2017·Annals of Work Exposures and Health·Jean A PulidoJack T Dennerlein

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