Type 1 diabetes

Greater Urinary Calcium Excretion Is Associated With Diminished Bone Accrual in Youth With Type 1 Diabetes

J Clin Endocrinol MetabPublished Observational study

Authors' conclusion

Urinary calcium excretion was negatively associated with bone accrual in this cohort of youth with T1D. Mechanistic studies are needed to determine if interventions to reduce urinary calcium excretion could increase bone accrual and reduce skeletal fragility in people with T1D.

Study context

Population
Youth with T1D aged 6 to 20 yearstwo cohorts
Participants
50 vs 99
Exposure
Bone accrual vs Urinary calcium excretion
  • Bone accrualn = 50
  • Urinary calcium excretionn = 99
Outcome
Whole body less head BMC (WBLH BMC) velocity Z-score and fractional excretion of calcium (FeCa)
Follow-up
12 months
Methodological detailslongitudinal bone accrual cohort, cross-sectional urinary calcium excretion cohort
  • Longitudinal bone accrual cohort
  • Cross-sectional urinary calcium excretion cohort

Main finding

As reported in the abstract

FeCa vs WBLH BMC velocity Z-score (bone accrual cohort)

Fractional excretion of calcium (FeCa) negatively associated with WBLH BMC velocity Z-score, ρ

−0.47

P = .001

WBLH BMC velocity Z-score vs healthy reference dataset (lower)

−0.3 ± 1.0

P = .03

Observational data: associations, not effects.

Further findings

Determinants of FeCa in multivariable regression (urinary calcium excretion cohort)

Intact PTH, β
−0.4, P = .01
Beta c-telopeptide, β
0.35, P = .007
HbA1c, β
0.08, P = .03
Urine fractional glucose excretion, β
0.07, P = .03
  • Models included known determinants of urinary calcium excretion; either HbA1c or urine fractional glucose excretion

Original publication

Greater Urinary Calcium Excretion Is Associated With Diminished Bone Accrual in Youth With Type 1 Diabetes. J Clin Endocrinol Metab. Published 20 September 2024. doi:10.1210/clinem/dgae660

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