title: [Observation of preventing of bone loss during early postmenopause by percutaneous estradiol in Chinese postmenopausal women].
abstract: OBJECTIVE
  To investigate the optimal regimen for application of percutaneous estradiol gel in preventing bone loss in Chinese postmenopausal women.
  
  
  METHODS
  A 3-year open randomized clinical study was designed. The percutaneous estradiol gel was used in a cyclic regimen combined with micronized progesterone (MP) or medroxyprogesterone acetate (MPA). Sixty healthy women (naturally menopause for 1 to 5 years) were recruited and divided into four groups according to estrogen dosage and two kinds of progestin. All were given for 25 d/month. The cortical bone mineral density (BMD) of right radius was measured by single photon absorptiometry. The trabecular BMD in lumbar vertebrae was measured by quantitative CT. The spine and hip BMD were also measured by dual energy X-ray absorptiometry at baseline, 6, 12, 18, 24 and 36 months, respectively. The bone metabolic markers, scores of menopausal symptoms were also evaluated.
  
  
  RESULTS
  Fifty-nine patients (98%) completed 1 year and 56 patients (93%) 2 years, 51 (85%) 3 years of study. The symptoms were alleviated by 80% after 6 months treatment on average. By the end of 24 month, the mean increases of BMD ranged from 4.3% to 7.5% in trabecular bone, and by the end of 36 month 4.2% to 6.2% in the lumbar (L) 2-4, 1.6% to 3.8% in the femur neck, with significant differences (P < 0.05). Comparing the 4 groups with each other, no significant differences (P > 0.05) were found in improvement of symptoms, bone markers and BMD.
  
  
  CONCLUSIONS
  Both daily estrogen containing 0.75 mg and 1.5 mg E2 are effective to prevent the early postmenopausal bone loss and improve the menopausal symptoms. During 3 years treatment, the BMD of lumbar increased continuously and the BMD of hip increased in the first 2 years and then plateau.
authors.affiliation: Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing 100730, China.
authors.forename: A
authors.initials: A
authors.lastname: Sun
authors.forename: S
authors.initials: S
authors.lastname: Lin
authors.forename: Y
authors.initials: Y
authors.lastname: Wei
mesh_terms: D000279:Administration, Cutaneous; D000368:Aged; D015519:Bone Density; D004338:Drug Combinations; D004958:Estradiol / Q000008:administration & dosage / Q000097:blood / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D017258:Medroxyprogesterone Acetate / Q000008:administration & dosage / Q000627:therapeutic use; D008875:Middle Aged; D015663:Osteoporosis, Postmenopausal / Q000517:prevention & control*; D017698:Postmenopause
chemical_list: D004338:Drug Combinations; D004958:Estradiol; D017258:Medroxyprogesterone Acetate