Osteoporosis, Postmenopausal Osteoporosis
Conditions
Keywords
BA058, abaloparatide, Abaloparatide-SC, osteoporosis, postmenopausal, bone loss, ACTIVE, fracture
Brief summary
The purpose of this study is to determine whether BA058 (abaloparatide), a parathyroid hormone-related peptide, is effective in preventing fractures in postmenopausal women with severe osteoporosis who are at risk of fractures.
Detailed description
This is a randomized, double-blind, placebo-controlled, comparative Phase 3, multicenter international study to evaluate the efficacy and safety of BA058 (abaloparatide) 80 µg in the prevention of fracture in otherwise healthy ambulatory postmenopausal women with severe osteoporosis.
Interventions
Placebo 0 mcg subcutaneous daily
BA058 80 mcg subcutaneous daily
teriparatide 20 mcg subcutaneous daily
Sponsors
Study design
Eligibility
Inclusion criteria
* Healthy ambulatory postmenopausal (≥ 5 years) women from 50 to 85 years of age (inclusive) with a diagnosis of osteoporosis * The women are to have a bone mineral density (BMD) T score ≤ -2.5 and \> -5.0 at the lumbar spine or hip (femoral neck) by dual energy x-ray absorptiometry (DXA) and radiological evidence of 2 or more mild or one or more moderate lumbar or thoracic vertebral fractures, or history of low trauma forearm, humerus, sacral, pelvic, hip, femoral, or tibial fracture within the past 5 years. Postmenopausal women older than 65 who meet the above fracture criteria but have a T score ≤ -2.0 and \> -5.0 may be enrolled. Women older than 65 who do not meet the fracture criteria may also be enrolled if their T score is ≤ -3.0 and \> -5.0 * Normal physical exam, vital signs, electrocardiogram (ECG) and medical history * Laboratory tests within the normal range including serum calcium, PTH(1-84), serum phosphorus and alkaline phosphatase
Exclusion criteria
* History of more than 4 mild or moderate spine fractures or any severe fracture * Abnormality of the spine or hip that would prohibit assessment of bone mineral density (BMD) * Unexplained elevation of serum alkaline phosphatase, history of bone disorders (such as Paget's disease) or a diagnosis of cancer within the last 5 years (with the exception of basal cell or squamous cancer of the skin) * History of thyroid, parathyroid, or adrenal disorders, or malabsorptive syndromes or any chronic or recurrent diseases or disturbances that would interfere with the interpretation of study data or compromise the safety of the patient * Prior treatment with parathyroid hormone (PTH) or parathyroid hormone-related peptid (PTHrP) * Prior treatment with bisphosphonates, fluoride, or strontium within the past five years or treatment with androgens, anabolic steroids, corticosteroids or selective estrogen receptor modulators within the past 12 months (except hormone replacement therapy) * Prior treatment with an investigational drug within the past 12 months * History of nephrolithiasis or urolithiasis within the past five years, or history of osteosarcoma at any time
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Number of Participants With New Vertebral Fractures at 18 Months | 18 months |
Secondary
| Measure | Time frame |
|---|---|
| Percent Change in Bone Mineral Density (BMD) of Lumbar Spine From Baseline to 18 Months | Basline and 18 months |
| Percent Change in Bone Mineral Density (BMD) of Total Hip From Baseline to Month 18 | Baseline and 18 months |
| Percent Change in Bone Mineral Density (BMD) of Femoral Neck From Baseline to Month 18 | Baseline and 18 months |
| Number of Participants With Non-vertebral Fractures at 18 Months | 18 months |
| Number of Treatment-Emergent Adverse Events Associated With Hypercalcemia at 18 Months | 18 months |
Countries
Argentina, Brazil, Czechia, Denmark, Estonia, Hong Kong, Lithuania, Poland, Romania, United States
Participant flow
Participants by arm
| Arm | Count |
|---|---|
| Placebo Placebo identical in appearance to BA058 study drug
Placebo: Placebo 0 mcg subcutaneous daily | 821 |
| BA058 80 mcg (Abaloparatide) BA058 80 mcg: BA058 80 mcg subcutaneous daily | 824 |
| Teriparatide Blinded until after randomization, then open-label
teriparatide: teriparatide 20 mcg subcutaneous daily | 818 |
| Total | 2,463 |
Baseline characteristics
| Characteristic | Placebo | BA058 80 mcg (Abaloparatide) | Teriparatide | Total |
|---|---|---|---|---|
| Age, Continuous | 68.7 years STANDARD_DEVIATION 6.5 | 68.9 years STANDARD_DEVIATION 6.5 | 68.8 years STANDARD_DEVIATION 6.6 | 68.8 years STANDARD_DEVIATION 6.5 |
| Gender Female | 821 Participants | 824 Participants | 818 Participants | 2463 Participants |
| Gender Male | 0 Participants | 0 Participants | 0 Participants | 0 Participants |
Adverse events
| Event type | EG000 affected / at risk | EG001 affected / at risk | EG002 affected / at risk |
|---|---|---|---|
| deaths Total, all-cause mortality | — / — | — / — | — / — |
| other Total, other adverse events | 447 / 820 | 492 / 822 | 456 / 818 |
| serious Total, serious adverse events | 90 / 820 | 80 / 822 | 82 / 818 |
Outcome results
Number of Participants With New Vertebral Fractures at 18 Months
Time frame: 18 months
Population: Modified intent-to-treat (MITT) population included all patients with pre-treatment and end-of-treatment evaluable radiologic assessment (spine X-ray).
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Placebo | Number of Participants With New Vertebral Fractures at 18 Months | 30 participants |
| BA058 80 mcg (Abaloparatide) | Number of Participants With New Vertebral Fractures at 18 Months | 4 participants |
| Teriparatide | Number of Participants With New Vertebral Fractures at 18 Months | 6 participants |
Number of Participants With Non-vertebral Fractures at 18 Months
Time frame: 18 months
Population: Intent-to-treat population included all patients who were randomized into the study by assigning the randomized study medication kit on Day 1.
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Placebo | Number of Participants With Non-vertebral Fractures at 18 Months | 33 Participants |
| BA058 80 mcg (Abaloparatide) | Number of Participants With Non-vertebral Fractures at 18 Months | 18 Participants |
| Teriparatide | Number of Participants With Non-vertebral Fractures at 18 Months | 24 Participants |
Number of Treatment-Emergent Adverse Events Associated With Hypercalcemia at 18 Months
Time frame: 18 months
Population: Safety population included all patients who received 1 or more doses of study medication
| Arm | Measure | Value (NUMBER) |
|---|---|---|
| Placebo | Number of Treatment-Emergent Adverse Events Associated With Hypercalcemia at 18 Months | 5 Hypercalcemic events |
| BA058 80 mcg (Abaloparatide) | Number of Treatment-Emergent Adverse Events Associated With Hypercalcemia at 18 Months | 15 Hypercalcemic events |
| Teriparatide | Number of Treatment-Emergent Adverse Events Associated With Hypercalcemia at 18 Months | 34 Hypercalcemic events |
Percent Change in Bone Mineral Density (BMD) of Femoral Neck From Baseline to Month 18
Time frame: Baseline and 18 months
Population: Intent-to-treat population included all patients who were randomized into the study by assigning the randomized study medication kit on Day 1. Baseline BMD data were missing for some patients; the method of last observation carried forward (LOCF) was used to impute missing data.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Placebo | Percent Change in Bone Mineral Density (BMD) of Femoral Neck From Baseline to Month 18 | -0.44 percent change | Standard Deviation 3.57 |
| BA058 80 mcg (Abaloparatide) | Percent Change in Bone Mineral Density (BMD) of Femoral Neck From Baseline to Month 18 | 2.90 percent change | Standard Deviation 4.21 |
| Teriparatide | Percent Change in Bone Mineral Density (BMD) of Femoral Neck From Baseline to Month 18 | 2.26 percent change | Standard Deviation 3.57 |
Percent Change in Bone Mineral Density (BMD) of Lumbar Spine From Baseline to 18 Months
Time frame: Basline and 18 months
Population: Intent-to-treat population included all patients who were randomized into the study by assigning the randomized study medication kit on Day 1. Baseline BMD data were missing for some patients; the method of last observation carried forward (LOCF) was used to impute missing data.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Placebo | Percent Change in Bone Mineral Density (BMD) of Lumbar Spine From Baseline to 18 Months | 0.48 percent change from baseline | Standard Deviation 3.82 |
| BA058 80 mcg (Abaloparatide) | Percent Change in Bone Mineral Density (BMD) of Lumbar Spine From Baseline to 18 Months | 9.20 percent change from baseline | Standard Deviation 7.54 |
| Teriparatide | Percent Change in Bone Mineral Density (BMD) of Lumbar Spine From Baseline to 18 Months | 9.12 percent change from baseline | Standard Deviation 6.28 |
Percent Change in Bone Mineral Density (BMD) of Total Hip From Baseline to Month 18
Time frame: Baseline and 18 months
Population: Intent-to-treat population included all patients who were randomized into the study by assigning the randomized study medication kit on Day 1. Baseline BMD data were missing for some patients; the method of last observation carried forward (LOCF) was used to impute missing data.
| Arm | Measure | Value (MEAN) | Dispersion |
|---|---|---|---|
| Placebo | Percent Change in Bone Mineral Density (BMD) of Total Hip From Baseline to Month 18 | -0.08 percent change | Standard Deviation 2.77 |
| BA058 80 mcg (Abaloparatide) | Percent Change in Bone Mineral Density (BMD) of Total Hip From Baseline to Month 18 | 3.44 percent change | Standard Deviation 3.51 |
| Teriparatide | Percent Change in Bone Mineral Density (BMD) of Total Hip From Baseline to Month 18 | 2.81 percent change | Standard Deviation 3.33 |