Abstract | STUDY OBJECTIVE: DESIGN: Randomized, double-blind, placebo-controlled, parallel study. SETTING: General Clinical Research Center at a university hospital. PATIENTS: Seventy-six patients with untreated OSA. INTERVENTIONS: Patients were randomly assigned to 1 of 3 treatments (CPAP, placebo-CPAP, or nocturnal oxygen at 3 L per minute) for 2 weeks. Sleep quality was assessed at baseline and after 1 and 14 days of therapy. Repeated-measures analysis of variance was used to evaluate treatment and time effects, and their interaction. MEASUREMENTS AND RESULTS: Sixty-three patients completed the protocol. When compared with placebo-CPAP and nocturnal oxygen, CPAP increased rapid eye movement (REM) sleep and significantly reduced stage 1 sleep and the number of stage shifts (p < or = .003). CPAP improved, to within normal limits, the apnea-hypopnea index, total arousal index, and mean oxyhemoglobin saturation (p < or = .001). The effects of CPAP were apparent during the first night of therapy. Oxygen improved only mean nocturnal saturation (p = .009). CPAP had no significant effect on stage 2 sleep or slow-wave sleep. CONCLUSIONS: CPAP was associated with an improvement in sleep quality in patients with OSA by consolidating sleep, reducing stage 1 sleep, and improving REM sleep. CPAP was effective in correcting the respiratory and arousal abnormalities of OSA. The effectiveness of supplemental oxygen was limited to oxyhemoglobin desaturation.
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Authors | José S Loredo, Sonia Ancoli-Israel, Eui-Joong Kim, Weon Jeong Lim, Joel E Dimsdale |
Journal | Sleep
(Sleep)
Vol. 29
Issue 4
Pg. 564-71
(Apr 2006)
ISSN: 0161-8105 [Print] United States |
PMID | 16676791
(Publication Type: Journal Article, Randomized Controlled Trial)
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Chemical References |
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Topics |
- Arousal
(physiology)
- Continuous Positive Airway Pressure
(methods)
- Disorders of Excessive Somnolence
(diagnosis, epidemiology)
- Double-Blind Method
- Female
- Humans
- Male
- Middle Aged
- Oxygen
(therapeutic use)
- Patient Compliance
(statistics & numerical data)
- Polysomnography
- Severity of Illness Index
- Sleep
- Sleep Apnea, Obstructive
(diagnosis, drug therapy, therapy)
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