AHI And NREM Sleep Differences

The main research question in this article was to be able to study and compare AHI, apnea-hypopnea Index, in REM and NREM sleep in both supine and latera body position. AHI represents the number of apneas and hypopneas in an hour of sleep. Previous studies estimate around 8.8% - 46.5% of men and 3.7% - 30.5% of women have an AHI of at least 5. Higher body mass index, being a male, and older age are factors that increase OSA, obstructive sleep apnea. It is thought that OSA is more severe in supine position and in REM sleep over non-Rem. According to the article, there are conflicting evidence about AHI for some studies did not find any differences of AHI between REM and NREM. Body position may be the confounding factor that answers all questions. …show more content…
There were 422 patients, 344 males and 78 females, who went through a polysomnography from March 2009 to June 2012. The records were manually scored to their standard criteria. Scoring hypopneas were patients with total sleep time duration of hypopneas under 200 minutes. The duration of REM and NREM must be similar otherwise there could be large opportunities for error. AHI had to be greater than 0, and values of means of Oa, obtrusive apnea, or Ma, mixed apneas, that were zero were not used in the analysis. The researchers compared AHI in REM and NREM sleep in supine or lateral body position, but only AHI values with a 20-minute minimum record were accepted. The process went from a larger sample to a small sample in where all viable participants were analyzed and their stats were put into standard