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NCT Number: NCT07376343

Comparative Study of CPAP Predictive Equations and In-laboratory Manual Titration in Thai Patients With Obstructive Sleep Apnea

The goal of this observational study is to compare predictive equations for continuous positive airway pressure (CPAP) with in-laboratory manual titration in patients with obstructive sleep apnea (OSA).

The main question the study aims to answer is:

Which CPAP predictive equation best predicts the optimal CPAP pressure in OSA patients in Thailand? Participants will undergo an in-laboratory sleep study.

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Key information

Conditions

OSA - Obstructive Sleep Apnea Apnea Dyssomnias Nervous System Diseases Respiration Disorders Respiratory Tract Diseases Sleep Apnea Syndromes Sleep Apnea, Obstructive Sleep Disorders, Intrinsic Sleep Wake Disorders

Age range

18 year and older

Sex eligibility

All sexes

Study type

Observational

Primary location

Faculty of Medicine, Thammasat University, Pathum Thani, Thailand

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About this study

This study is a cross-sectional study involving Thai patients aged 18 years or older with suspected obstructive sleep apnea (OSA). Participants will undergo an in-laboratory sleep study. During the study, sleep technicians will use CPAP predictive equations to estimate the optimal CPAP pressure.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Suspected OSA
  • Undergoing an in-laboratory sleep study

Exclusion criteria

  • No indication for in-laboratory manual CPAP titration
  • Failure to determine an optimal CPAP pressure during in-laboratory manual CPAP titration

Treatment and study plan

Sleep test

Diagnostic Test

Type 1 polysomnography will be performed in the Sleep Center of Thammasat (SCENT).

Predictive equations of continuous positive airway pressure (CPAP)

Other

CPAP predictive equations will be selected based on evidence from reliable studies.

Primary outcomes

  1. Accuracy of CPAP equations in predicting the optimal pressure in OSA patients

    Time frame: At baseline

    Sensitivity and specificity (%) of CPAP equations in predicting the optimal pressure in OSA patients

Study contacts

Contact information is provided by the study sponsor or research team.

Apiwat Pugongchai, MSc

CONTACT

[email protected]

+669269142

Narongkorn Saiphoklang, MD

CONTACT

[email protected]

+6629269794

Sponsors and collaborators

Lead sponsor

Thammasat University

Other

Registry information

Important dates

Study start
2026
Primary completion
2026
Study completion
2026
First posted
Jan 29, 2026
Registry last updated
Apr 17, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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