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Low-back pain (LBP) is a serious health problem in many industrial settings. The article Isodynamic Evaluation of Trunk Muscles and Low-Back Pain Among Workers in a Steel Factory (Ergonomics, 1995: 2107-2117) reported the accompanying summary data on lateral range of motion (degrees) for a sample of workers without a history of LBP and an- other sample with a history of this malady.
Condition
Sample Size
Sample Mean
Sample SD
No LBP
28
91.5
5.5
LBP
31
88.3
7.8
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