ClinicalTrials.gg
Status unknownNCT04085419Updated Nov 4, 2022

Osteoporosis in Primary Hyperparathyroidism

A Phase 4 interventional study of Denosumab 60 MG/ML Prefilled Syringe [Prolia] and Zoledronic Acid in Primary Hyperparathyroidism and Osteoporosis, sponsored by University Medical Centre Ljubljana. Status unknown at 1 site in Slovenia. Open to female participants. Per ClinicalTrials.gov, last updated 2022-11-04.

Sponsored by University Medical Centre Ljubljana · Phase 4, Interventional, and Treatment

The sponsor has not verified this record recently (last verified Nov 2022), so the status shown — last known as Enrolling by invitation — may be out of date.

From the registry’s dates

  • Registered 3 months after the study started (first participant enrolled May 2019, registered Sep 2019).
Phase
Phase 4
Study type
Interventional
Enrollment
40
Allocation
Randomized
Sex
Female
01

Study summary

Investigators will prospectively include 40 postmenopausal women with secondary osteoporosis due to primary hyperparathyroidism who have refused surgery. Participants will be randomized in two groups and treated either with zoledronic acid 5 mg iv once a year or with denosumab 60 mg sc every 6 months. Investigators will compare the effect of both drugs on bone turnover markers and basic laboratory parameters after 3, 12 and 24 months of treatment, and on the bone mineral density after 12 and 24 months of treatment. All participants will take cholecalciferol 800 - 1000 IU daily.

02

Conditions studied

  • Primary Hyperparathyroidism
  • Osteoporosis

Keywords

  • zoledronic acid
  • denosumab
  • primary hyperparathyroidism
  • osteoporosis
03

In context

Hyperparathyroidism, Primary

104 studies on the registry are indexed under Hyperparathyroidism, Primary; 23 are open to participants now.

This study's planned enrollment of 40 is below the median of 68 across 60 interventional studies indexed under Hyperparathyroidism, Primary.

Browse Hyperparathyroidism, Primary studies →

Lead sponsor

University Medical Centre Ljubljana is the lead sponsor of 296 studies on the registry; 72 are open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
Child (0–17), Adult (18–64), Older adult (65+)
Sexes eligible
Female
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • women (>12 months after last menstrual period) with primary hyperparathyroidism and with osteoporosis on Dual Energy Xray Absorptiometry (DXA) (according to International Society for Clinical Densitometry (ISCD) - criteria) and/or osteoporotic fracture of the vertebra or hip

Exclusion criteria

Exclusion Criteria:

  • The patient is not able to give
  • other classic complications of primary hyperparathyroidism (e.g. kidney stones, renal insufficiency)
  • serum albumin-corrected calcium level > 2.85 mmol/L (except when the patient is reluctant to undergo surgical treatment)
  • osteoporosis treatment less than a year ago, less than two years ago in the case of oral bisphosphonate, less than three years ago in the case of parenteral bisphosphonate
  • bilateral hip endoprosthesis
  • additional causes for secondary osteoporosis (other than vitamin D deficiency) and pathological laboratory findings that are incompatible with the Summary of Product Characteristics (SmPC) of both medicines
  • cancer, except if in stable remission of more than 5 years
Terms in these criteria, in plain language(2)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

05

Study design

Phase
Phase 4
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
40 participants (estimated)

Study arms

  • Active comparator
    denosumab

    denosumab 60 mg subcutaneously every 6 months

    Drug: Denosumab 60 MG/ML Prefilled Syringe [Prolia]

  • Active comparator
    zoledronic acid

    zoledronic acid 5 mg intravenously once a year

    Drug: Zoledronic Acid

Interventions

  • DrugDenosumab 60 MG/ML Prefilled Syringe [Prolia]

    Drug page: Denosumab

    denosumab 60 mg subcutaneously every 6 months

    Also known as: Xgeva

  • zoledronic acid 5 mg intravenously once a year

    Also known as: Aclasta

06

What researchers measure

Primary outcomes

  1. Bone mineral density after one year of treatment

    Dual-energy X-ray absorptiometry (DXA)

    Time frame: one year

  2. CTX after 3 months of treatment

    Unit of Measure: pmol/L

    Time frame: 3 months

  3. Corrected calcium after 3 months of treatment

    Unit of Measure: mmol/L

    Time frame: 3 months

  4. Bone mineral density after two years of treatment

    Dual-energy X-ray absorptiometry (DXA)

    Time frame: two years

  5. CTX after 12 months of treatment

    Unit of Measure: pmol/L

    Time frame: one year

  6. CTX after 24 months of treatment

    Unit of Measure: pmol/L

    Time frame: two years

  7. PINP after 3 months of treatment

    Unit of Measure: µg/L

    Time frame: 3 months

  8. PINP after 12 months of treatment

    Unit of Measure: µg/L

    Time frame: one year

  9. PINP after 24 months of treatment

    Unit of Measure: µg/L

    Time frame: two years

  10. Bone-specific alkaline phosphatase (BAP) after 3 months of treatment

    Unit of Measure: µg/L

    Time frame: 3 months

  11. Bone-specific alkaline phosphatase (BAP) after 12 months of treatment

    Unit of Measure: µg/L

    Time frame: one year

  12. Bone-specific alkaline phosphatase (BAP) after 24 months of treatment

    Unit of Measure: µg/L

    Time frame: two years

  13. Corrected calcium after 12 months of treatment

    Unit of Measure: mmol/L

    Time frame: one year

  14. Corrected calcium after 24 months of treatment

    Unit of Measure: mmol/L

    Time frame: two years

07

Study locations

1 site
  • Endocrinology Department
    Ljubljana, 1000, Slovenia
08

References and documents

Individual participant data

Plan to share: Yes — Bone mineral density, bone turnover markers and basic laboratory results will be shared.

Supporting information: Study protocol, Statistical analysis plan, Informed consent form, Clinical study report

Time frame: The data will become available in 3 years. They will be available for 5 years.

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 4, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT04085419
Responsible party
Tomaz Kocjan (Professor Tomaz Kocjan, MD, PhD, University Medical Centre Ljubljana) — Principal investigator
First posted
Sep 11, 2019
Start date
May 8, 2019
Primary completion
May 2023 (estimated)
Completion
May 2023 (estimated)
Last update
Nov 4, 2022

Study contacts

Tomaz Kocjan, MD, PhD
principal investigator · UMC Ljubljana

Oversight

FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is status unknown, as verified in Nov 2022. You cannot join it, but the record below documents what was studied.

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Studies of the drugs tested here: Denosumab · Zoledronic Acid

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