title: [Variability of bone response to hormone replacement therapy].
abstract: Bone response to hormone replacement therapy (HRT) was assessed in a retrospective longitudinal study. 115 women started on HRT for the first time and 252 controls underwent initial densitometric evaluation (spine and femur) and a second evaluation on average 29 months later. Patients were classified as post-menopausal or perimenopausal according to whether they had had more or less than 6 months amenorrhea. Oral or non-oral 17-beta estradiol was used at the dose generally accepted to be skeletally protective. In the post-menopausal group, prescription of HRT was followed by spinal and femoral bone gain (+ 2.85% and + 1.06% per year respectively). There was no bone gain with HRT in the peri-menopausal women, but the stability seen contrasted greatly with the very marked bone loss found in controls (spine - 3.09% per year and femur - 1.78% per year). Lumbar densitometric variations were correlated, at least in the post-menopausal group, with those in the femur, but the amplitude of femoral variations was half that of the spine. Body mass index (BMI) was not found to be a predictive factor of bone response to HRT in this group, but the time since the menopause and initial densitometric results were. For the spine, the % of subjects losing their bone mass in response to the start of HRT, nil in the post-menopausal group, was 16% in peri-menopausal women. The % of good responders increased from 8% peri-menopausally to more than 59% 2 years after the menopause. The response in the femur appeared to be very different, with 20% good responders and a % of stable subjects similar to that of the control group. Femoral variations and the existence regarding the spine of a group showing no or only a poor response to HRT would be in favor of densitometric monitoring when initial bone mass is low.
authors.affiliation: Hôpital Boucicaut, Service de Gynécologie-Obstétrique, Paris.
authors.forename: J C
authors.initials: JC
authors.lastname: Ruiz
authors.forename: A
authors.initials: A
authors.lastname: Tamborini
authors.forename: P
authors.initials: P
authors.lastname: Neftel
authors.forename: B
authors.initials: B
authors.lastname: Bosio-Le Goux
authors.forename: F
authors.initials: F
authors.lastname: Lecuru
authors.forename: R
authors.initials: R
authors.lastname: Taurelle
mesh_terms: D015502:Absorptiometry, Photon; D000328:Adult; D000368:Aged; D015992:Body Mass Index; D015519:Bone Density / Q000187:drug effects*; D004958:Estradiol / Q000627:therapeutic use; D015914:Estrogen Replacement Therapy; D005260:Female; D005269:Femur / Q000000981:diagnostic imaging; D006801:Humans; D008137:Longitudinal Studies; D008875:Middle Aged; D017698:Postmenopause / Q000187:drug effects*; D011237:Predictive Value of Tests; D017697:Premenopause / Q000187:drug effects*; D012189:Retrospective Studies; D013131:Spine / Q000000981:diagnostic imaging
chemical_list: D004958:Estradiol
vernacular_title: Variabilité de la réponse osseuse à l'instauration d'une hormonothérapie substitutive.