Abstract
Several studies have shown a higher prevalence of radiological abnormalities among
gymnasts. However, the types of radiological abnormalities associated with low back
pain (LBP) have not been clarified. The hypothesis was that significant relationships
between radiological abnormalities and LBP may be revealed by discriminating between
the types of MRI abnormalities while considering confounding factors. The subjects
were 104 Japanese collegiate gymnasts (men, 70; women, 34). The presence of LBP was
evaluated using the questionnaire developed by Osaka City University (OCU Test). Magnetic
resonance imaging (MRI) abnormalities were evaluated using T1- and T2-weighted MRI.
The prevalence of more than 1 MRI abnormality in gymnasts was 47.1% (49/104). The
chi-square test showed that the incidence of lumbar disc degeneration (LDDG) and limbus
vertebra was significantly greater in gymnasts with LBP than in gymnasts without LBP.
By using logistic regression analysis to analyze the concomitant environmental variables,
only LDDG (odds ratio, 2.70; 95% confidence interval, 1.10–6.66) was selected as a
statistically significant variable accounting for LBP. In conclusion, LDDG is a predictor
for LBP in Japanese collegiate gymnasts.
Key words
magnetic resonance imaging - lumbar spine - gymnastic