NCT07491965

Brief Summary

Association between Benign Paroxysmal Positional Vertigo and Vitamin D deficiency

Trial Health

77
On Track

Trial Health Score

Automated assessment based on enrollment pace, timeline, and geographic reach

Enrollment
160

participants targeted

Target at P50-P75 for all trials

Timeline
2mo left

Started Apr 2026

Shorter than P25 for all trials

Geographic Reach
1 country

1 active site

Status
recruiting

Health score is calculated from publicly available data and should be used for screening purposes only.

Trial Relationships

Click on a node to explore related trials.

Study Timeline

Key milestones and dates

Study Progress67%
Apr 2026Oct 2026

First Submitted

Initial submission to the registry

March 19, 2026

Completed
6 days until next milestone

First Posted

Study publicly available on registry

March 25, 2026

Completed
7 days until next milestone

Study Start

First participant enrolled

April 1, 2026

Completed
5 months until next milestone

Primary Completion

Last participant's last visit for primary outcome

September 1, 2026

Expected
1 month until next milestone

Study Completion

Last participant's last visit for all outcomes

October 1, 2026

Last Updated

June 18, 2026

Status Verified

June 1, 2026

Enrollment Period

5 months

First QC Date

March 19, 2026

Last Update Submit

June 16, 2026

Conditions

Benign Paroxysmal Positional Vertigo (BPPV)

Keywords

Vitamin D deficiencyBenign Paroxysmal Positional Vertigo

Outcome Measures

Primary Outcomes (1)

  • Level of Vitamin D in patients with Benign Paroxysmal Positional Vertigo

    From enrollment to 1 months after investigation

Study Arms (2)

case

Diagnostic Test: Vitamin D

control

Diagnostic Test: Vitamin D

Interventions

Vitamin DDIAGNOSTIC_TEST

Level of Vitamin D

casecontrol

Eligibility Criteria

Sexall
Healthy VolunteersNo
Age GroupsChild (0-17), Adult (18-64), Older Adult (65+)
Sampling MethodProbability Sample
Study Population

Otolaryngology (ENT) Outpatient Clinic and Audiovestibular unit at Sohag University Hospital, Sohag, Egypt.

You may qualify if:

  • Cases: Adults with a confirmed diagnosis of idiopathic BPPV based on positive Dix-Hallpike maneuver (nystagmus and vertigo lasting \<1 minute).
  • Controls: Adults attending ENT clinic without history of vertigo or BPPV, confirmed by negative Dix-Hallpike test.

You may not qualify if:

  • Known causes of secondary vertigo (e.g., Meniere's disease, vestibular neuritis, central vertigo).
  • Conditions affecting vitamin D metabolism (e.g., chronic kidney disease, malabsorption syndromes, hyperparathyroidism).
  • Use of medications interfering with vitamin D levels (e.g., anticonvulsants, glucocorticoids) in the past 3 months.
  • Pregnancy or lactation.
  • Inability to provide consent.

Contact the study team to confirm eligibility.

Sponsors & Collaborators

Study Sites (1)

Sohag University Hospital

Sohag, Egypt

RECRUITING

MeSH Terms

Conditions

Benign Paroxysmal Positional VertigoVitamin D Deficiency

Interventions

Vitamin D Response Element

Condition Hierarchy (Ancestors)

VertigoVestibular DiseasesLabyrinth DiseasesEar DiseasesOtorhinolaryngologic DiseasesNeurologic ManifestationsNervous System DiseasesSigns and SymptomsPathological Conditions, Signs and SymptomsAvitaminosisDeficiency DiseasesMalnutritionNutrition DisordersNutritional and Metabolic Diseases

Intervention Hierarchy (Ancestors)

Response ElementsEnhancer Elements, GeneticRegulatory Sequences, Nucleic AcidBase SequenceMolecular StructureBiochemical PhenomenaChemical PhenomenaPromoter Regions, GeneticGenetic StructuresGenetic PhenomenaRegulatory Elements, TranscriptionalGene ComponentsGenesGenome ComponentsGenome

Central Study Contacts

Ahmed Usama

CONTACT

2001012888469ahmedurashad2101@gmail.com

Study Design

Study Type
observational
Observational Model
CASE CONTROL
Time Perspective
PROSPECTIVE
Sponsor Type
OTHER
Responsible Party
PRINCIPAL INVESTIGATOR
PI Title
Resident doctor

Study Record Dates

First Submitted

March 19, 2026

First Posted

March 25, 2026

Study Start

April 1, 2026

Primary Completion (Estimated)

September 1, 2026

Study Completion (Estimated)

October 1, 2026

Last Updated

June 18, 2026

Record last verified: 2026-06

Locations

EG(1)