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Jiu-Chiaun Chen, MD, MPH, ScD, Jack T. Dennerlein, PhD, Tung-Sheng Shih, ScD, Chiou-Jong Chen, PhD, Yawen Cheng, ScD, Wushou P. Chang, MD, ScD, Louise M. Ryan, PhD and David C. Christiani, MD, MPH, MS

Jiu-Chiuan Chen, Jack T. Dennerlein, and David C. Christiani are with the Occupational Health Program, Department of Environmental Health, Harvard School of Public Health, Boston, Mass. Tung-Sheng Shi and Chiou-Jong Chen are with the Institute of Occupational Safety and Health, Council of Labor Affairs, Taipei, Taiwan. Yawen Cheng is with the Department of Public Health, College of Medicine, National Cheng-Kung University, Tainan, Taiwan. Wushou P. Chang is with the Institute of Environmental Health Science, National Yang-Ming University, Taipei. Louis M. Ryan is with the Department of Biostatistics, Harvard School of Public Health.

Correspondence: Requests for reprints should be sent to David C. Christiani, Occupational Health Program, Dept of Environmental Health, Harvard School of Public Health, Bldg I, Rm 1402, 665 Huntington Ave, Boston, MA 02115 (e-mail: dchris{at}hohp.harvard.edu).

Objectives. We explored a postulated association between daily driving time and knee pain.

Methods. We used data from the Taxi Drivers’ Health Study to estimate 1-year prevalence of knee pain as assessed by the Nordic musculoskeletal questionnaire.

Results. Among 1242 drivers, the prevalence of knee pain, stratified by duration of daily driving ( 6, > 6 through 8, > 8 through 10, and > 10 hours), was 11%, 17%, 19%, and 22%, respectively. Compared with driving 6 or fewer hours per day, the odds ratio of knee pain prevalence for driving more than 6 hours per day was 2.52 (95% confidence interval = 1.36, 4.65) after we adjusted for socioeconomic, work-related, and personal factors in the multiple logistic regression.

Conclusions. The dose-related association between driving duration and knee pain raises concerns about work-related knee joint disorders among professional drivers.

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				J-C Chen, Y-J Chen, W P Chang, and D C Christiani Long driving time is associated with haematological markers of increased cardiovascular risk in taxi drivers Occup. Environ. Med., December 1, 2005; 62(12): 890 - 894. [Abstract] [Full Text] [PDF]