C-reactive protein evolution in obstructive sleep apnoea patients under CPAP therapy
Sophia E Schiza1, Charalampos Mermigkis, Panagou Panagiotis
1Sleep Disorders Unit, Department of Thoracic Medicine, Medical School, University of Crete, Heraklion, Voutes, Greece. schiza@med.uoc.gr
European Journal of Clinical Investigation
|July 16, 2010
Summary
Continuous positive airway pressure (CPAP) therapy significantly reduces C-reactive protein (CRP) levels in obstructive sleep apnea (OSA) patients. Good CPAP compliance for at least six months is crucial for optimal cardiovascular benefits.
Area of Science:
- Cardiology
- Sleep Medicine
- Inflammation Research
Background:
- C-reactive protein (CRP) is linked to atherosclerosis and cardiovascular disease.
- Obstructive sleep apnea (OSA) is a condition associated with increased cardiovascular risk.
- Understanding CRP changes in OSA patients undergoing treatment is important.
Purpose of the Study:
- To evaluate C-reactive protein (CRP) levels over a one-year period in patients with obstructive sleep apnea (OSA).
- To assess the impact of continuous positive airway pressure (CPAP) therapy on CRP evolution.
- To compare CRP changes between patients with good and poor CPAP compliance.
Main Methods:
- A cohort of 528 patients with moderate to severe OSA was studied.
- CRP levels were measured before CPAP initiation and at 3, 6, and 12 months.
- Patients were categorized into good and poor CPAP compliance groups.
Main Results:
- CPAP therapy led to a significant reduction in CRP levels (0.74±0.62mg/dL to 0.31±0.29mg/dL, P<0.001).
- CRP levels decreased gradually over 3 months, with a sharp decline at 6 months, then plateaued.
- This CRP reduction pattern was evident only in patients with good CPAP compliance.
Conclusions:
- High compliance with CPAP therapy significantly lowers CRP levels in OSA patients.
- A minimum of six months of CPAP use is necessary to achieve substantial cardiovascular benefits.
- Effective CPAP adherence is key to mitigating cardiovascular morbidity and mortality in OSA.
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