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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

One-year adolescent bone mineral density and bone formation marker changes through the use or lack of use of combined hormonal contraceptives

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Anapaula da Conceição Bisi Rizzo ; Tamara Beres Lederer Goldberg ; Talita Poli Biason ; Cilmery Suemi Kurokawa ; Carla Cristiane da Silva ; José Eduardo Corrente ; Helio Rubens Carvalho Nunes
Total Authors: 7
Document type: Journal article
Source: Jornal de Pediatria; v. 95, n. 5, p. 567-574, Set. 2019.
Web of Science Citations: 0

Abstract Objective: The objective of this study was to evaluate the effects of two low-dose combined oral contraceptives on bone metabolism in adolescents for one year. Methods: This was a quasi-experimental study. The adolescents were divided into three groups: oral contraceptives 1 (n = 42) (20 µg EE/150 µg desogestrel), oral contraceptives 2 (n = 66) (30 µg EE/3 mg drospirenone), and a control group (n = 70). Adolescents underwent anthropometric assessment and densitometry (dual-energy X-ray). Bone age and bone formation markers (osteocalcin and bone alkaline phosphatase) were evaluated. The oral contraceptives users were evaluated again after 12 months. Linear regression analysis was used to indirectly study the effect of each additional year of chronological age on anthropometric and densitometric variables as well as on bone markers in the control group. Results: At study entry, no significant differences were observed between the oral contraceptives 1, oral contraceptives 2, and controls in the analyzed variables. Linear regression analysis showed an increase in bone mineral density and bone mineral content for each additional year. There was a significant reduction in bone alkaline phosphatase levels; no significant difference was observed for osteocalcin in control individuals. Comparison of dual-energy X-ray variables at baseline and after one year showed no significant differences in the oral contraceptives 1 or oral contraceptives 2 groups. A significant reduction in bone alkaline phosphatase and osteocalcin levels was observed in both the oral contraceptives 1 and oral contraceptives 2 groups. Conclusion: Adolescent women gain peak bone mass during this phase of life. Two low-dose combined oral hormonal contraceptives were associated with lower bone gain and lower bone formation markers than in untreated controls. (AU)

FAPESP's process: 11/05991-0 - The impact of body fat excess on bone densitometry and bone metabolims biomarkers: a study with overweight, obese and superobese adolescents
Grantee:Tamara Beres Lederer Goldberg
Support type: Regular Research Grants
FAPESP's process: 07/07731-0 - Bone mineral density and content in healthy female adolescents between 10 and 20 years old and their relationship with bone formation and reabsorption markers
Grantee:Tamara Beres Lederer Goldberg
Support type: Regular Research Grants
FAPESP's process: 15/04040-2 - Bone mineral density and bone biomarkers assessment in adolescents user of low-dose combined oral contraceptive (ethinylestradiol 20µg/Desogestrel 150µg): 1 year follow-up
Grantee:Tamara Beres Lederer Goldberg
Support type: Regular Research Grants