A blood test for liver trouble may flag hidden risk in sleep apnea patients
NCT ID NCT07798518
First seen Sep 01, 2026 · Last updated Sep 18, 2026 · Updated 2 times
Summary
Researchers are looking at whether the FIB-4 index, a blood-based score that estimates liver fibrosis risk, tracks with the severity of obstructive sleep apnea (OSA) and low oxygen levels during sleep. They will review records from 373 adults who had full-night sleep studies, grouping them by apnea severity and comparing their FIB-4 values. The study also checks how many people with OSA have FIB-4 scores above a common threshold that suggests further liver evaluation. This is an observational analysis, so it can point to connections but cannot prove that sleep apnea causes liver changes.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If a link exists, FIB-4 could become a simple blood-based clue for spotting liver fibrosis risk in people with sleep apnea, prompting earlier liver checks.
- What could go wrong
- This is a retrospective review, so it can only show associations, not cause and effect. The findings may not apply to everyone, and FIB-4 is not a confirmed liver fibrosis diagnosis.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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373 people
The number who actually took part.
- Started
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Jan 2026
- Finished
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Jul 2026
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
Who is studied
The study population consisted of adults aged 18-65 years who underwent diagnostic full-night polysomnography for evaluation of suspected sleep-disordered breathing. Eligible participants were identified retrospectively from hospital records and classified according to the apnea-hypopnea index (AHI) as AHI \<5 events/hour, mild OSA (5-14.9 events/hour), moderate OSA (15-29.9 events/hour), or severe OSA (≥30 events/hour).
- Ages
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18 to 65 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Adults aged 18-65 years. * Underwent technically adequate diagnostic full-night polysomnography. * Sufficient demographic and clinical data available for OSA classification. Exclusion Criteria: * Age \<18 or \>65 years. * Technically inadequate polysomnography. * Split-night or positive airway pressure (PAP) titration studies. * Known advanced chronic liver disease or cirrhosis. * Hematologic malignancy. * Active infection. * Clinically significant systemic inflammatory or autoimmune disease. * Chemotherapy, radiotherapy, or immunosuppressive therapy. * Pregnancy. * Clinically significant alcohol use or alcohol-related liver disease. * Missing laboratory components required for the relevant FIB-4 or NLR analysis.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Hisar Hospital Intercontinental
Istanbul, Istanbul, 34768, Turkey (Türkiye)
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