The natural course of bone mineral density in transgender youth before medical treatment; a cross sectional study (Q28183)

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  • The natural course of bone mineral density in transgender youth before medical treatment; a cross sectional study.
  • The natural course of bone mineral density in transgender youth before medical treatment
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English
The natural course of bone mineral density in transgender youth before medical treatment; a cross sectional study
No description defined
  • The natural course of bone mineral density in transgender youth before medical treatment; a cross sectional study.
  • The natural course of bone mineral density in transgender youth before medical treatment

Statements

The natural course of bone mineral density in transgender youth before medical treatment; a cross sectional study. (English)
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Bone mineral density (BMD) Z-scores decrease during puberty suppression in transgender youth. (English)
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Assessment of treatment impact has been based on the assumption that without intervention, BMD Z-scores remain stable. (English)
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However, the natural course of BMD in this population is unknown. (English)
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Dual-energy X-ray absorptiometry scans prior to medical intervention were included from 333 individuals assigned male at birth (AMAB) and 556 individuals assigned female at birth (AFAB) aged 12-25 years. (English)
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The relationship between age and BMD Z-scores of sex assigned at birth was analysed for the lumbar spine (LS), total hip (TH), femoral neck (FN), and total-body-less-head (TBLH), adjusted for height SDS, height-adjusted lean mass Z-score, and whole body percentage fat Z-score. (English)
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In individuals AMAB, the BMD Z-score was negatively associated with age between 12 and 22 years: LS -0.13/year (95% confidence interval, CI -0.17; -0.10); TH -0.05/year (95% CI -0.08; -0.02); FN -0.06/year (95% CI -0.10; -0.03); and TBLH -0.12/year (95% CI -0.15; -0.09). (English)
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Adjusting for height-adjusted lean mass Z-score attenuated the association at the LS and TBLH and eliminated the association at the TH and FN. (English)
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BMD Z-scores and age were not associated between 22 and 25 years. (English)
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In individuals AFAB, BMD Z-scores were only associated with age at the TBLH (-0.08/year, 95% CI -0.12; -0.04) between age 12 and 20 years. (English)
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In individuals AMAB aged 12-22 years prior to any treatment, BMD Z-scores were inversely correlated with age. (English)
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This could imply that BMD increases less in individuals AMAB than in the general population, and that changes in Z-score during puberty suppression and subsequent hormone supplementation are not necessarily due to treatment, but possibly related to lifestyle factors. (English)
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30 September 2024
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30 September 2024
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191
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4
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426-432
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426
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432
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unknown value
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Conflict of interest: None declared. (English)
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