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Association between menopause and lumbar disc degeneration: An MRI study of 1,566 women and 1,382 men

Menopause Oct 01, 2017

Lou C, et al. - In this study, researchers revisit and further research the relationship amongst menopause and disc degeneration in the lumbar spine utilizing a magnetic resonance imaging-based eight-level grading system. The outcome of this study suggests that the menopause is related to lumbar disc degeneration. The association occurred in the first 15 years since menopause (YSM), recommending that estrogen deficiency might be a risk factor of disc degeneration of the lumbar spine. Further studies should be completed for deciding whether age or menopause play a more important role in the progression of disc degeneration in the lumbar spine.

Methods

  • From June 2013 to October 2016, 1,566 women and 1,382 age-matched men who were admitted for low back pain were comprised in this study.
  • In this study, information on age, weight, height, body mass index, age at natural menopause, and years since menopause (YSM) were obtained.
  • By utilizing a magnetic resonance imaging-based eight-level grading system, lumbar disc degeneration was evaluated.

Results

  • After adjustment for the confounding factors of age, height, and weight, young age-matched men were more susceptible to disc degeneration than premenopausal women (P < 0.05).
  • However, after menopause, postmenopausal women had a significant tendency to develop more severe disc degeneration than their age-matched men (P < 0.05), and also compared with premenopausal and perimenopausal women (P < 0.01).
  • Postmenopausal women were divided into nine subgroups by every 5 YSM.
  • When YSM was less than 15 years, a positive trend was observed between YSM and severity of disc degeneration, respectively, at L1/L2 (r = 0.241), L2/L3 (r = 0.193), L3/L4 (r = 0.191), L4/L5 (r = 0.165), L5/S1 (r = 0.153), and all lumbar discs (r = 0.237) (P < 0.05 or 0.01).
  • The analysis of covariance indicated a significant difference in each disc level (P < 0.05 or 0.01) between every two groups.
  • When YSM was over 15 years, the significant difference, however, disappeared in each disc level (P > 0.05).

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