Original Article: PDF OnlyAn Epidemiologic Study of Non-Occupational Lifting as a Risk Factor for Herniated Lumbar Intervertebral DiscMundt, Diane J. PhD*; Kelsey, Jennifer L. PhD†; Golden, Anne L. PhD‡; Pastides, Harris PhD§; Berg, Anne T. PhD; Sklar, Joseph MD∥; Hosea, Timothy MD**; Panjabi, Manohar M. PhD†† The Northeast Collaborative Group on Low Back Pain Author Information *From the National Academy of Science, Institute of Medicine, Washington, DC. †From the Department of Health Research and Policy, Stanford University School of Medicine, Stanford, California ‡From the Department of Community Medicine, Mt. Sinai School of Medicine, New York, New York §Department of Biostatistics and Epidemiology, University of Massachusetts School of Public Health Amherst, Massachusetts, the Department of Pediatrics, Yale University, New Haven, Connecticut ∥From the Department of New England Orthopedic Surgeons, Inc., Springfield, Massachusetts **From the Division of Orthopedic Surgery, UMDNJ-Robert Wood Johnson Medical School, New Brunswick, New Jersey ††From the Department of Orthopedics and Rehabilitation, Yale University, New Haven, Connecticut ‡‡The Northeast Collaborative Group on Low Back Pain is as follows: Doctors David Andrews, Robert Bye, Stephen Cook, Michael Coyle, Jr., William Cunningham, Demosthenes Dasco, John DeWeese, Harold Dick, Aiden Doyle, Richard Fingeroth, S. Ashby Grantham, Michael Handler, Neil Kahanovitz, Sumner Karas, Ira Kasoff, J. Robert Kirkwood, Joseph Leddy, Marc Linson, Jerry Lubliner; Morton Lynn, Marc Malberg, Christopher Michelson, W. Jost Michelson, Sabir Moghul, Arthur Pava, Michael Pirone, Mark Pohlman, Donald Polakoff, Kalmon Post, Andrea Resnick, Bernard Rineberg, Steven Schonfeld, Michael Silverstein, Sherman Stein, Alfred Tria, Jr., Leonard Wagner, Steven Wenner, and Joseph Zawadsky The study was conducted at Columbia University, New York, NY and the University of Massachusetts, Amherst, MA. Spine 18(5):p 595-602, April 1993. Buy Abstract An epidemiologic case-control study of herniated lumbar intervertebral disc was conducted in Springfield, Massachusetts, New Brunswick, New Jersey, and New York, New York, to evaluate the role of several possible risk factors in the etiology of this disorder. Patients with signs and symptoms of herniated lumbar disc (N =287) were matched to control subjects without back pain by age, sex, source of care, and geographic area. Of the total case-subject group, 177 were confirmed by surgery, computed tomographic scan, myelogram, or magnetic resonance Imaging. This article focuses on non-occupational lifting, an activity not previously reported on. Frequent lifting of objects or children weighing 25 or more pounds with knees straight and back bent was associated with increased risk of herniated lumbar disc. This association was particularly strong among confirmed case subjects (relative risk=3.95). Positive associations among confirmed case subjects were also seen for frequent lifting with arms extended (relative risk=1.87) and twisting while lifting (relative risk=1.90). No associations were found for frequent stretching or carrying. If confirmed in other investigations, these data suggest that instruction in lifting techniques should be extended into the home. © Lippincott-Raven Publishers.