In an unadjusted analysis, patients with an apnea-hypopnea index
of more than 20 were 4.
Multivariate linear regression analysis was used to test independent contribution of following potential predictors for coronary risk scores based on tomographic coronary calcification scores: age, body-mass index, apnea-hypopnea index
, deep oxygen desaturation index and nocturnal average oxygen saturation.
In early studies, researchers traditionally determined the variability of sleep-disordered breathing by calculating the apnea-hypopnea index
(AHI) and the apnea index (AI).
Some machines can have trouble distinguishing true obstructive apneic events and central sleep apnea - apneic episodes despite an open airway - and misestimate the apnea-hypopnea index
The average apnea-hypopnea index
was 41 for the former and 45 for the latter.
During follow-up, the relative risk that a woman's apnea-hypopnea index
would rise to 5--indicating that the problem had become clinically significant--was 1.
Our results were consistent with those reported from in-house polysomnogram sleep studies; 71% of our patients had an apnea-hypopnea index
(AHI) of 15 or higher, and 93% had an AHI of at least 5.
With over 250,000 tests worldwide, WatchPAT is the only portable device providing Apnea-Hypopnea Index
(AHI), Respiratory Disturbance Index (RDI), and Oxygen Desaturation Index (ODI) based on actual sleep time and sleep states without a cumbersome nasal cannula or belt around the chest.
Results were measured by the apnea-hypopnea index
(AHI) score, used to assess the severity of sleep apnea based on the total number of complete cessations (apnea) and partial obstructions (hypoapnea) of breathing that last for at least 10 seconds per hour of sleep.
For example, the mean apnea-hypopnea index
at baseline was 34.
Among the subset of heart failure patients with excessive daytime sleepiness who had undergone testing in a sleep laboratory, the majority was found to have sleep-disordered breathing, with an apnea-hypopnea index
of at least 15 events per hour, reported Dr.
0 times higher in patients with REM-related OSA, defined as having an REM apnea-hypopnea index
(AHI) of 10 or more breathing pauses per hour of REM sleep.
A DME MAC letter to physicians stated that Type IV monitors must provide direct calculation of an apnea-hypopnea index
(AHI) or respiratory disturbance index (RDI) as a result of measuring airflow of thoracoabdominal movement.
4% were diagnosed with obstructive sleep apnea syndrome, defined as having an apnea-hypopnea index
of more than 5 and severe daytime sleepiness, Dr.
One consequence of these drawbacks is that there is the potential to underestimate the apnea-hypopnea index
, because the number of respiratory events would be divided by the recording time rather than the total sleep time.