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FLEX - Long-term Extension of FIT (Fracture Intervention Trial)(0217-051)

A 5-year, Double-blind, Randomized, Placebo-controlled Extension Study to Examine the Long-term Safety and Efficacy of Oral Alendronate in Postmenopausal Women Who Previously Received Alendronate in Conjunction With the Fracture Intervention Trial

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT00398931
Enrollment
1099
Registered
2006-11-14
Start date
1998-02-28
Completion date
2003-10-31
Last updated
2022-02-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Osteoporosis, Postmenopausal

Brief summary

This study was conducted among women who had previously received alendronate for 3 to 6 years during the Fracture Intervention Trial (FIT). Participants in the FLEX study were randomly assigned to receive alendronate (either 5 or 10 mg/day) or matching placebo during the next 5 years, in order to evaluate the effects of continuing or discontinuing alendronate treatment on bone mineral density and biochemical markers of bone turnover.

Interventions

DRUGMK0217, alendronate sodium / Duration of Treatment : 5 Years
DRUGComparator : placebo (unspecified) /Duration of Treatment : 5 Years

Sponsors

Organon and Co
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
DOUBLE (Subject, Investigator)

Eligibility

Sex/Gender
FEMALE
Age
60 Years to 86 Years
Healthy volunteers
No

Inclusion criteria

* To be eligible to participate in this study, women needed to have previously participated in the Fracture Intervention Trial (FIT) and to have been part of the group treated with alendronate in FIT * They needed to have received at least 3 years of treatment with alendronate in the FIT trial * In addition, their bone mineral density (BMD) at the hip needed to be better than it was at the start of FIT

Exclusion criteria

* Patients were excluded if they had conditions that contraindicated alendronate therapy and if they might have used other medications for the treatment of osteoporosis * Women were also excluded if BMD at the hip was below a certain level (T-score \<=-3.5); that is, if it were 3.5 standard deviations or more lower than the average for young adult women

Design outcomes

Primary

MeasureTime frame
Total hip bone mineral density (BMD)

Secondary

MeasureTime frame
BMD of femoral neck, trochanter, and lumbar spine
Biochemical markers of bone turnover

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Mar 8, 2026