Osteoporosis, bone & mineral

One versus 2 years of alendronate following denosumab: the CARD extension

Osteoporos IntPublished Randomised controlled trial

Authors' conclusion

With the limitations of our small sample size, these data suggest that both 1 and 2 years of alendronate effectively maintain BMD gains achieved with 1 year of denosumab and prevented any rebound in bone turnover marker levels above pre-denosumab baseline.

Study context

Population
Postmenopausal osteoporotic women aged 60–79 at high fracture risk who received 12 months of denosumab followed by 12 months of alendronate
Participants
10 vs 8
Comparison
Alendronate for an additional 12 months vs calcium and vitamin D alone, after 12 months of denosumab and 12 months of alendronate
  • Alendronaten = 10
  • Calcium/vitamin Dn = 8reference
Primary endpoint
Change in spine bone mineral density (BMD) between months 24 and 36
Follow-up
Months 24-36
Methodological detailsextension study of the CARD trial
  • Extension study of the CARD trial

Primary result

As reported in the abstract

Spine BMD, months 24-36 · month 36
  • Areal BMD (aBMD) maintained at the spine in both groups

Further findings

OutcomeP value
Transient comparative decrease in aBMD in calcium/vitamin D group, months 24-30Calcium/vitamin D vs Alendronate · total hipP = 0.008
Transient comparative decrease in aBMD in calcium/vitamin D group, months 24-30Calcium/vitamin D vs Alendronate · femoral neckP = 0.040
Increase in bone turnover markers (CTX, P1NP), months 24-36 (exploratory)Calcium/vitamin D vs Alendronate · greater increase in calcium/vitamin D groupP = 0.051 for CTX
Increase in bone turnover markers (CTX, P1NP), months 24-36 (exploratory)Calcium/vitamin D vs Alendronate · greater increase in calcium/vitamin D groupP = 0.030 for P1NP
Increase in bone turnover markers (CTX, P1NP), months 24-36 (exploratory) — CTX and PINP remained below month 0 baseline in both groups
P < 0.05 for all comparisons

Total hip and femoral neck aBMD (exploratory) · months 24-36

aBMD maintained at total hip and femoral neck in both groups

Original publication

One versus 2 years of alendronate following denosumab: the CARD extension. Osteoporos Int. Published 7 August 2024. doi:10.1007/s00198-024-07213-2

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