An observational study in Olfactory Disorder, Taste Disorders and Smell Dysfunction, sponsored by Universitaire Ziekenhuizen KU Leuven. Recruiting at 1 site in Belgium. Per ClinicalTrials.gov, last updated 2025-12-18.
Sponsored by Universitaire Ziekenhuizen KU Leuven · Observational
Smell/taste disorders are common conditions with a significant impact on quality of life. In September 2021, a specific consultation for patients with smell and taste disorders was initiated at the ENT-HNS (ear, nose, and throat, head and neck surgery) department of UZ Leuven, partly in light of post-COVID-19 related smell disorders.
With this observational ambidirectional study, the investigators aim to better map smell/taste disorders in the Belgian/Flemish population. Using standard-of-care diagnostic tests and structured questionnaires, the investigators strive to gain more insight into the severity, impact, and progression/prognosis of smell/taste disorders.
43 studies on the registry are indexed under Taste Disorders; 6 are open to participants now.
This study's planned enrollment of 500 is above the median of 100 across 21 observational studies indexed under Taste Disorders.
Browse Taste Disorders studies →Universitaire Ziekenhuizen KU Leuven is the lead sponsor of 963 studies on the registry; 267 are open to participants now.
Of its 5 completed or terminated interventional studies of FDA-regulated products, 0 (0%) have results posted.
Counted across the registry records on this site, refreshed daily.
Patients consulting for chemosensory dysfunction
Inclusion criteria:
There are no exclusion criteria related to sex, gender, or ethnicity. There are no exclusion criteria related to medical history or prior treatments.
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.
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.
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.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Standard of care
Chemosensory function
Time frame: Observational up to 5 years follow-up
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
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Universitaire Ziekenhuizen KU Leuven →