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  • Title: A comparison of bone mineral density in normal weight and obese adolescents with polycystic ovary syndrome.
    Author: To WW, Wong MW.
    Journal: J Pediatr Adolesc Gynecol; 2012 Aug; 25(4):248-53. PubMed ID: 22840935.
    Abstract:
    STUDY OBJECTIVE: To evaluate whether there are any differences in bone mineral density (BMD) between normal weight and obese adolescents suffering from polycystic ovary syndrome (PCOS) with oligo/amenorrhea. DESIGN: Prospective cohort study. SETTING: Adolescent gynecology clinic in a general service hospital. PARTICIPANTS: Subjects consisted of adolescents between 16 to 18 years of age presenting with oligo/ amenorrhea with ultrasound morphology of polycystic ovaries ± evidence of hyperandrogenism over 24 months. Controls consisted of consecutive eumenorrheic patients within the same age group. INTERVENTIONS: All underwent full hormonal profile assessment, and dual energy X-ray absorptiometry and peripheral quantitative computed tomography scans. MAIN OUTCOME MEASURES: Areal and volumetric BMD parameters. RESULTS: Of 37 adolescents with PCOS, 12 (32%) were obese with BMI ≥25, of which 9/12 (75%) were hyperandrogenic. The control group consisted of 40 normal weight eumenorrheic girls. The PCOS group overall had lower lumbar spine BMD values as compared to the controls (0.91 vs 0.97 g/ cm(2), P = 0.033). The normal weight PCOS group had lower BMD at the spine (0.90 vs 0.97 g/ cm(2), P = 0.027), trochanter (0.66 vs 0.71 g/ cm(2), P = 0.039) as well as volumetric distal tibial core sites (268 vs 296 mg/ cm(3)) as compared to eumenorrheic controls, but there were no significant BMD differences between the obese PCOS group and the eumenorrheic controls. CONCLUSIONS: Normal weight PCOS adolescents with oligo/amenorrhea have marginally lower BMD values than controls, but obese PCOS adolescents have BMD values compatible with eumenorrheic adolescents.
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