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The odds ratios for risk of chronic kidney disease according to menarche age and reproductive period. A, Odds ratios according to menarche age. The risk of CKD was lower in women with menarche below age 11, but statistical significance was not observed. B, Odds ratios according to reproductive period. The risk of CKD was lower in women exhibiting a reproductive period of over 40 years, and statistical significance was observed. CKD = chronic kidney disease.
