Sleep Med Psychophysiol.  2013 Jun;20(1):31-34.

Comparison between Group I in Which Non-Supine Apnea-Hypopnea Index> or =5 and Group II in Which Non-Supine Apnea-Hypopnea Index<5 in Patients with Positional Sleep Apnea

• Park WI
• Jung HW
• Joo JB
• Cho JE
• Kim JY

Abstract

OBJECTIVES
The aim of this study was to evaluate the differences in patients with positional dependent sleep apnea according to their non-supine apnea-hypopnea index (AHI, > or =5 vs. <5).
METHODS
92 patients with positional sleep apnea were evaluated. The patients were divided into two groups : group I was non-supine AHI having > or =5 ; group II was non-supine AHI having less than 5. Statistical analysis was performed to find the difference between two groups.
RESULTS
In 92 patients, the number of group I patients was 11 (12%) and the number of group II patients was 81 (88%). In the severe AHI group, percentage of group I was dominated (70%) and showing a significant difference compared with the mild and moderate AHI groups (p<.05). In the severe body mass index (BMI) group, percentage of group I was dominated (54.5%) and showing a significant difference compared with of the mild and moderate BMI groups (p<.05). The percentage of group I was significantly higher than group II (p<.05) in the AHI, supine AHI, non-supine AHI and snore time.
CONCLUSIONS
In patients with positional sleep apnea, severe OSA and high BMI are more common in patients with non-supine AHI> or =5 than non-supine AHI<5.

Keyword

Obstructive sleep apnea; Apnea-hypopnea index; Body mass index; Portable polysomnography

MeSH Terms

Body Mass Index
Humans
Sleep Apnea Syndromes
Sleep Apnea, Obstructive