Nocebo Effect in OSA Patients With CPAP Treatment

Study Overview
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Brief Summary
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This study is aimed to evaluate whether the information provided by health care professionals in the visits previous to start with CPAP treatment may influence the number of reported adverse effects and compliance in patients with obstructive sleep apnea (OSA) in treatment with CPAP.

Detailed Description
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Background: The presence of side effects in the first few weeks of treatment with CPAP is common. However, it has never been evaluated whether side effects could be related to the presence of the nocebo effect in this population. Main objective: To assess whether the information provided by health care professionals may influence the number of reported adverse events and compliance in patients with obstructive sleep apnea (OSA) in treatment with CPAP. Methodology: Unicentric randomized clinical trial that will include 80 patients over 18 years of age with a recent diagnosis of OSA and indication for treatment with CPAP. Participants will be recruited consecutively and will be randomly assigned in a 1: 1 ratio to receive usual information or more detailed information in possible adverse effects of treatment during the CPAP adaptation visit. Follow-up will be performed at 1 month and 3 months after starting CPAP treatment. Side effects and treatment compliance in each of the groups will be blindly assessed. Descriptive statistics and differences in the number of side effects and hours of compliance between the two groups will be performed.

Official Title
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Study of the Nocebo Effect in Patients With Obstructive Sleep Apnea Syndrome and Treatment With Continuous Positive Airway Pressure

Conditions
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Obstructive Sleep Apnea

Intervention / Treatment
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* Other: Detailed information


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patients diagnosed with OSA with indication for CPAP treatment To be over 18 years old Sign informed consent for study participation. Exclusion Criteria: Patients previously treated with CPAP. Patients with other previous treatments for OSA (surgery, mandibular advancement device, etc.) Presence of any other previously diagnosed sleep disorder Patients with> 50% central sleep apnea or Cheyne-Stokes respiration Diagnosis of a mental or physical condition that makes difficult to complete questionnaires

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| No Intervention: Usual information<br>Subjects allocated to this arm will receive the usual information about OSA and CPAP treatment given in clinical practise | |
| Active Comparator: Detailed information<br>Subjects allocated to this arm will also receive the usual information about OSA and CPAP treatment and they will also receive information related to the possible adverse side effects of CPAP treatment. The healthcare professional will enumerate the possible side effects and indicate which are more and less common. | Other: Detailed information<br>* Subjects in this arm will receive usual information + detailed information on side effects<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Number of side effects | Evaluate the number of side effects reported in both arms | at 1 month | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Hours of CPAP use | Number of hours will be collected from the internal clock of the CPAP device | at 3 month |