A retrospective case-control study: Vitamin D deficiency and secondary hyperparathyroidism in patients with severe obesity before and after bariatric surgery

A retrospective case-control study: Vitamin D deficiency and secondary hyperparathyroidism in patients with severe obesity before and after bariatric surgery - VitDParat

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

DRKS

Registry ID

DRKS00032077

Enrollment

400

Registered

2025-08-15

Start date

2024-10-02

Completion date

Unknown

Last updated

2025-10-06

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

Conditions

E21.1

Interventions

Group 1: Retrospective examination of Patients before and up to 48 months after planned bariatric surgery at the initial endocrinology examination.

Eligibility

Sex/Gender

All

Age

18 Years to 60 Years

Inclusion criteria

Inclusion criteria: Obesity with BMI > 40 kg/m², Period of investigation 10.2020-10.2024.

Exclusion criteria

Exclusion criteria: cushing disease

Design outcomes

Primary

Measure	Time frame
Incidence of secondary hyperparathyroidism.	—

Secondary

Measure	Time frame
Normalization of parathyroid hormone levels under vitamin D substitution, verification of a dose-response correlation.	—

Countries

Germany

Contacts

Public ContactClaus Rolf

Adipositas-Zentrum Nord-West

dr.rolf@smhf.de+4944919407343

Outcome results

None listed

Source: DRKS (via WHO ICTRP) · Data processed: Feb 4, 2026