We have examined the association between body mass index and the preva
lence of low back pain in about a quarter of a million male recruits a
ged 17-18 years at the time of their medical draft examination. Low ba
ck pain prevalence is shown to rise with increasing body mass index. T
his statistically significant association may suggest a role of body w
eight and height in the pathogenesis of low back pain and supports the
previously reported need for education regarding weight reduction as
a useful implement in low back pain prevention.