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An Open-label Study to Evaluate the Effect of Treatment With Romosozumab or Teriparatide in Postmenopausal Women

An Open-label, Randomized, Teriparatide-controlled Study to Evaluate the Effect of Treatment With Romosozumab in Postmenopausal Women With Osteoporosis Previously Treated With Bisphosphonate Therapy

Status
Completed
Phases
Phase 3
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT01796301
Acronym
STRUCTURE
Enrollment
436
Registered
2013-02-21
Start date
2013-01-31
Completion date
2015-05-14
Last updated
2022-11-29

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

Conditions

Postmenopausal Osteoporosis

Keywords

Postmenopausal Osteoporosis

Brief summary

The primary objective of the study was to evaluate the effect of 12 months of treatment with romosozumab compared with teriparatide on total hip bone mineral density (BMD) in postmenopausal women with osteoporosis who were previously treated with bisphosphonate therapy.

Interventions

DRUGRomozosumab

Administered by subcutaneous injection once a month.

DRUGTeriparatide

Administered by subcutaneous injection once a day.

Sponsors

Amgen
Lead SponsorINDUSTRY

Study design

Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
FEMALE
Age
55 Years to 90 Years
Healthy volunteers
No

Inclusion criteria

* Postmenopausal women, aged ≥ 55 to ≤ 90. * Received oral bisphosphonate therapy for at least 3 years immediately prior to screening * BMD T-score ≤ -2.50 at the lumbar spine, total hip or femoral neck * History of nonvertebral fracture after age 50, or vertebral fracture.

Exclusion criteria

* Use of other agents affecting bone metabolism including Strontium ranelate, fluoride (for osteoporosis), odanacatib (MK-0822) or any other cathepsin K inhibitor, IV bisphosphonates, denosumab, teriparatide (TPTD) or any parathyroid hormone (PTH) analogs, Systemic oral or transdermal estrogen, selective estrogen receptor modulators (SERMs), activated vitamin D3, vitamin K2, calcitonin, tibolone, cinacalcet, systemic glucocorticosteroids: * History of metabolic or bone disease (except osteoporosis) that may interfere with the interpretation of study results, such as sclerosteosis, Paget's disease, rheumatoid arthritis, osteomalacia, osteogenesis imperfecta, osteopetrosis, ankylosing spondylitis, Cushing's disease, hyperprolactinemia, and malabsorption syndrome. * Vitamin D insufficiency, defined as 25 (OH) vitamin D levels \< 20 ng/mL, as determined by the central laboratory. * Current hyper- or hypocalcemia * Current, uncontrolled hyper- or hypothyroidism

Design outcomes

Primary

MeasureTime frameDescription
Percent Change From Baseline Through Month 12 in Total Hip Bone Mineral Density (BMD)Baseline, month 6 and month 12Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA). Percent change from baseline through month 12 is the average of the treatment effect at months 6 and 12.

Secondary

MeasureTime frameDescription
Percent Change From Baseline in Total Hip BMD at Month 12Baseline and month 12Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).
Percent Change From Baseline in Cortical BMD by Quantitative Computed Tomography (QCT) at the Total Hip at Month 6Baseline and month 6Cortical BMD was measured by quantitative computed tomography (QCT) at the total hip.
Percent Change From Baseline in Cortical BMD by QCT at the Total Hip at Month 12Baseline and month 12Cortical BMD was measured by quantitative computed tomography (QCT) at the total hip.
Percent Change From Baseline in Integral BMD by QCT at the Total Hip at Month 6Baseline and month 6Integral BMD was measured by quantitative computed tomography (QCT) at the total hip.
Percent Change From Baseline in Integral BMD by QCT at the Total Hip at Month 12Baseline and month 12Integral BMD was measured by quantitative computed tomography (QCT) at the total hip.
Percent Change From Baseline in Estimated Strength at the Total Hip at Month 6Baseline and month 6Total hip estimated strength was assessed by finite element analysis (FEA) of QCT scans.
Percent Change From Baseline in Total Hip BMD at Month 6Baseline and month 6Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).
Percent Change From Baseline in Total Hip Integral Bone Mineral Content (BMC) by QCT at Month 6Baseline and month 6Total hip integral BMC was measured using quantitative computed tomography (QCT).
Percent Change From Baseline in Total Hip Integral Bone Mineral Content (BMC) by QCT at Month 12Baseline and month 12Total hip integral BMC was measured using quantitative computed tomography (QCT).
Percent Change From Baseline in Femoral Neck BMD at Month 6Baseline and month 6Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).
Percent Change From Baseline in Femoral Neck BMD at Month 12Baseline and month 12Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).
Percent Change From Baseline in Lumbar Spine BMD at Month 6Baseline and month 6Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).
Percent Change From Baseline in Lumbar Spine BMD at Month 12Baseline and month 12Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).
Percent Change From Baseline in Estimated Strength at the Total Hip at Month 12Baseline and month 12Total hip estimated strength was assessed by finite element analysis (FEA) of QCT scans.

Countries

Argentina, Belgium, Canada, Colombia, Czechia, Denmark, Hungary, Poland, Spain, United Kingdom, United States

Participant flow

Recruitment details

The study was conducted at 46 sites in North America, Latin America, and Europe. Participants were enrolled from 31 January 2013 to 29 April 2014.

Pre-assignment details

A total of 777 subjects were screened for participation; 341 (43.9%) were excluded prior to randomization, primarily due to not meeting inclusion/exclusion criteria (306 \[39.4%\] subjects). A total of 436 participants were randomized into the study.

Participants by arm

ArmCount
Teriparatide
Participants received 20 μg/day teriparatide administered by subcutaneous injection for 12 months.
218
Romosozumab
Participants received 210 mg romosozumab administered by subcutaneous injection once a month for 12 months.
218
Total436

Withdrawals & dropouts

PeriodReasonFG000FG001
Overall StudyDeath01
Overall StudyDecision by Sponsor01
Overall StudyLost to Follow-up33
Overall StudyWithdrawal by Subject1515

Baseline characteristics

CharacteristicRomosozumabTeriparatideTotal
Age, Continuous71.8 years
STANDARD_DEVIATION 7.4
71.2 years
STANDARD_DEVIATION 7.7
71.5 years
STANDARD_DEVIATION 7.5
Age, Customized
≥ 65 to < 75 years
83 Participants96 Participants179 Participants
Age, Customized
< 65 years
50 Participants48 Participants98 Participants
Age, Customized
≥ 75 years
85 Participants74 Participants159 Participants
Femoral Neck BMD T-score-2.49 T-score
STANDARD_DEVIATION 0.67
-2.43 T-score
STANDARD_DEVIATION 0.66
-2.46 T-score
STANDARD_DEVIATION 0.66
Lumbar Spine BMD T-score-2.83 T-score
STANDARD_DEVIATION 1.1
-2.87 T-score
STANDARD_DEVIATION 1.04
-2.85 T-score
STANDARD_DEVIATION 1.07
Prior Fracture
No
0 Participants1 Participants1 Participants
Prior Fracture
Yes
218 Participants217 Participants435 Participants
Race/Ethnicity, Customized
American Indian or Alaska Native
4 Participants1 Participants5 Participants
Race/Ethnicity, Customized
Asian
0 Participants2 Participants2 Participants
Race/Ethnicity, Customized
Multiple
0 Participants1 Participants1 Participants
Race/Ethnicity, Customized
Other
23 Participants18 Participants41 Participants
Race/Ethnicity, Customized
White
191 Participants196 Participants387 Participants
Serum Type 1 Collagen C-telopeptide (sCTX)252.3 ng/L
STANDARD_DEVIATION 136.4
260.1 ng/L
STANDARD_DEVIATION 124.9
256.2 ng/L
STANDARD_DEVIATION 130.7
Sex: Female, Male
Female
218 Participants218 Participants436 Participants
Sex: Female, Male
Male
0 Participants0 Participants0 Participants
Total Hip BMD T-score-2.27 T-score
STANDARD_DEVIATION 0.75
-2.21 T-score
STANDARD_DEVIATION 0.72
-2.24 T-score
STANDARD_DEVIATION 0.74

Adverse events

Event typeEG000
affected / at risk
EG001
affected / at risk
deaths
Total, all-cause mortality
— / —— / —
other
Total, other adverse events
76 / 21479 / 218
serious
Total, serious adverse events
23 / 21417 / 218

Outcome results

Primary

Percent Change From Baseline Through Month 12 in Total Hip Bone Mineral Density (BMD)

Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA). Percent change from baseline through month 12 is the average of the treatment effect at months 6 and 12.

Time frame: Baseline, month 6 and month 12

Population: The primary efficacy analysis set includes randomized participants with a non-missing baseline and at least one post-baseline measurement.

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline Through Month 12 in Total Hip Bone Mineral Density (BMD)-0.6 percent changeStandard Error 0.2
RomosozumabPercent Change From Baseline Through Month 12 in Total Hip Bone Mineral Density (BMD)2.6 percent changeStandard Error 0.2
Comparison: The primary analysis to assess the treatment difference (Romosozumab - Teriparatide) employed a linear mixed effects model for repeated measures. The model included main effects for treatment group, visit (categorical), baseline sCTX, baseline hip DXA BMD value, machine type (categorical), and machine type-by-baseline value interaction (to adjust for the effect of machine type on baseline DXA BMD value) as fixed main effects using an unstructured within-subject variance-covariance structure.p-value: <0.000195% CI: [2.7, 3.8]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Cortical BMD by QCT at the Total Hip at Month 12

Cortical BMD was measured by quantitative computed tomography (QCT) at the total hip.

Time frame: Baseline and month 12

Population: The primary efficacy analysis set with values at baseline and month 12

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Cortical BMD by QCT at the Total Hip at Month 12-3.6 percent changeStandard Error 0.3
RomosozumabPercent Change From Baseline in Cortical BMD by QCT at the Total Hip at Month 121.1 percent changeStandard Error 0.3
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, parameter baseline value, treatment-by visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [3.9, 5.3]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Cortical BMD by Quantitative Computed Tomography (QCT) at the Total Hip at Month 6

Cortical BMD was measured by quantitative computed tomography (QCT) at the total hip.

Time frame: Baseline and month 6

Population: The primary efficacy analysis set with values at baseline and month 6

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Cortical BMD by Quantitative Computed Tomography (QCT) at the Total Hip at Month 6-2.7 percent changeStandard Error 0.2
RomosozumabPercent Change From Baseline in Cortical BMD by Quantitative Computed Tomography (QCT) at the Total Hip at Month 60.7 percent changeStandard Error 0.2
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, parameter baseline value, treatment-by visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.8, 4]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Estimated Strength at the Total Hip at Month 12

Total hip estimated strength was assessed by finite element analysis (FEA) of QCT scans.

Time frame: Baseline and month 12

Population: The primary efficacy analysis set with values at baseline and month 12

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Estimated Strength at the Total Hip at Month 12-0.7 percent changeStandard Error 0.4
RomosozumabPercent Change From Baseline in Estimated Strength at the Total Hip at Month 122.5 percent changeStandard Error 0.4
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, parameter baseline value, treatment-by visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.1, 4.3]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Estimated Strength at the Total Hip at Month 6

Total hip estimated strength was assessed by finite element analysis (FEA) of QCT scans.

Time frame: Baseline and month 6

Population: The primary efficacy analysis set with values at baseline and month 6

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Estimated Strength at the Total Hip at Month 6-1.0 percent changeStandard Error 0.2
RomosozumabPercent Change From Baseline in Estimated Strength at the Total Hip at Month 62.1 percent changeStandard Error 0.2
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, parameter baseline value, treatment-by visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.4, 3.8]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Femoral Neck BMD at Month 12

Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).

Time frame: Baseline and month 12

Population: The primary efficacy analysis set with values at baseline and month 12

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Femoral Neck BMD at Month 12-0.2 percent changeStandard Error 0.3
RomosozumabPercent Change From Baseline in Femoral Neck BMD at Month 123.2 percent changeStandard Error 0.3
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, baseline BMD value, machine type, baseline BMD value-by machine type interaction, treatment-by-visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.6, 4.2]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Femoral Neck BMD at Month 6

Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).

Time frame: Baseline and month 6

Population: The primary efficacy analysis set with values at baseline and month 6

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Femoral Neck BMD at Month 6-1.1 percent changeStandard Error 0.3
RomosozumabPercent Change From Baseline in Femoral Neck BMD at Month 62.1 percent changeStandard Error 0.3
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, baseline BMD value, machine type, baseline BMD value-by machine type interaction, treatment-by-visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.5, 3.9]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Integral BMD by QCT at the Total Hip at Month 12

Integral BMD was measured by quantitative computed tomography (QCT) at the total hip.

Time frame: Baseline and month 12

Population: The primary efficacy analysis set with values at baseline and month 12

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Integral BMD by QCT at the Total Hip at Month 12-0.2 percent changeStandard Error 0.2
RomosozumabPercent Change From Baseline in Integral BMD by QCT at the Total Hip at Month 123.4 percent changeStandard Error 0.2
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, parameter baseline value, treatment-by visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.9, 4.2]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Integral BMD by QCT at the Total Hip at Month 6

Integral BMD was measured by quantitative computed tomography (QCT) at the total hip.

Time frame: Baseline and month 6

Population: The primary efficacy analysis set with values at baseline and month 6

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Integral BMD by QCT at the Total Hip at Month 6-0.8 percent changeStandard Error 0.2
RomosozumabPercent Change From Baseline in Integral BMD by QCT at the Total Hip at Month 62.3 percent changeStandard Error 0.2
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, parameter baseline value, treatment-by visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.5, 3.6]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Lumbar Spine BMD at Month 12

Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).

Time frame: Baseline and month 12

Population: The primary efficacy analysis set with values at baseline and month 12

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Lumbar Spine BMD at Month 125.4 percent changeStandard Error 0.4
RomosozumabPercent Change From Baseline in Lumbar Spine BMD at Month 129.8 percent changeStandard Error 0.4
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, baseline BMD value, machine type, baseline BMD value-by machine type interaction, treatment-by-visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [3.4, 5.4]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Lumbar Spine BMD at Month 6

Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).

Time frame: Baseline and month 6

Population: The primary efficacy analysis set with values at baseline and month 6

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Lumbar Spine BMD at Month 63.5 percent changeStandard Error 0.3
RomosozumabPercent Change From Baseline in Lumbar Spine BMD at Month 67.2 percent changeStandard Error 0.3
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, baseline BMD value, machine type, baseline BMD value-by machine type interaction, treatment-by-visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.9, 4.6]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Total Hip BMD at Month 12

Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).

Time frame: Baseline and month 12

Population: The primary efficacy analysis set with values at baseline and month 12

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Total Hip BMD at Month 12-0.5 percent changeStandard Error 0.2
RomosozumabPercent Change From Baseline in Total Hip BMD at Month 122.9 percent changeStandard Error 0.2
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, baseline BMD value, machine type, baseline BMD value-by machine type interaction, treatment-by-visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.8, 4]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Total Hip BMD at Month 6

Bone mineral density was measured by dual-energy X-ray absorptiometry (DXA).

Time frame: Baseline and month 6

Population: The primary efficacy analysis set with values at baseline and month 6

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Total Hip BMD at Month 6-0.8 percent changeStandard Error 0.2
RomosozumabPercent Change From Baseline in Total Hip BMD at Month 62.3 percent changeStandard Error 0.2
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, baseline BMD value, machine type, baseline BMD value-by machine type interaction, treatment-by-visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.5, 3.7]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Total Hip Integral Bone Mineral Content (BMC) by QCT at Month 12

Total hip integral BMC was measured using quantitative computed tomography (QCT).

Time frame: Baseline and month 12

Population: The primary efficacy analysis set with values at baseline and month 12

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Total Hip Integral Bone Mineral Content (BMC) by QCT at Month 120.0 percent changeStandard Error 0.2
RomosozumabPercent Change From Baseline in Total Hip Integral Bone Mineral Content (BMC) by QCT at Month 123.6 percent changeStandard Error 0.2
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, parameter baseline value, treatment-by visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.9, 4.2]Linear mixed effects repeated measures
Secondary

Percent Change From Baseline in Total Hip Integral Bone Mineral Content (BMC) by QCT at Month 6

Total hip integral BMC was measured using quantitative computed tomography (QCT).

Time frame: Baseline and month 6

Population: The primary efficacy analysis set with values at baseline and month 6

ArmMeasureValue (LEAST_SQUARES_MEAN)Dispersion
TeriparatidePercent Change From Baseline in Total Hip Integral Bone Mineral Content (BMC) by QCT at Month 6-0.7 percent changeStandard Error 0.2
RomosozumabPercent Change From Baseline in Total Hip Integral Bone Mineral Content (BMC) by QCT at Month 62.4 percent changeStandard Error 0.2
Comparison: Treatment difference (Romosozumab - Teriparatide) was analyzed using a linear mixed effects model for repeated measures adjusting for treatment, visit, baseline serum type 1 collagen C-telopeptide value, parameter baseline value, treatment-by visit interaction, and using an unstructured variance covariance structure.p-value: <0.000195% CI: [2.6, 3.6]Linear mixed effects repeated measures

Source: ClinicalTrials.gov · Data processed: Mar 9, 2026