Chest
Clinical InvestigationsDaytime Hypertension in Obstructive Sleep Apnea: Prevalence and Contributing Risk Factors
Section snippets
Part A
The records from all patients evaluated at the Sleep Apnea Laboratory at Rhode Island Hospital from January 1986 until December 1987 were reviewed. Two hundred six consecutive adult patients from Rhode Island and southeastern Massachusetts with OSA and no other sleep pathology were identified. All had undergone at least one night of standard polysomnographic testing in the laboratory, during which sleep was monitored with an electroencephalogram, two electro-oculograms, and a submental EMG.
Bart A
The population with OSA consisted of 33 female patients and 173 male patients. The characteristics of the group as a whole included an AHI of 48.5 ± 2.4 events per hour, an oxygen saturation baseline of 94.4 ± 0.2 percent, and a saturation nadir of 79.7 ± 0.8 percent. The mean age was 49.4 ± 0.8 years, and the BMI was 33.6 ± 0.5 kg/m2. The characteristics of the male and female patients were similar, although the women tended to be older (53.1 ± 1.8 vs 48.6 ± 0.9 years) and more obese (36.5 ±
Discussion
In this study, we attempted to determine the prevalence of hypertension in a recently evaluated population of patients with OSA. The first 206 adult patients with OSA studied in the only sleep laboratory in Rhode Island were included in this analysis. In this group of patients with moderately severe OSA, we found a prevalence of definite plus borderline hypertension of 45 percent, which is comparable although slightly less than some of the previous reports of OSA populations.
Using stepwise
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Manuscript received June 15; revision accepted September 17.