The independent variables included age, gender, BMI, TST, SE, SL, REML, WASO, NREM1%, NREM2%, NREM3%, REM%, AHI, arousal index
, P%, ESS, and MOCA.
Body mass index (BMI), AHI severity, and mean oxygen saturation, lowest oxygen saturation and arousal index
scores acquired during PSG were significantly correlated with OSDI scores, TBUT and Schirmer test values (p<0.
Various surrogate measures of arousals such as actigraphy have been shown to improve the arousal index
and possibly the agreement between OSAS diagnosis and PSG.
was defined as the number of awakenings per hour.
CPAP is effective at improving oxygen saturation and reducing scores on the arousal index
, which measures the frequency of arousals per hour of sleep using electroencephalography.
However, outcomes were significantly better with surgery than with watchful waiting on measures of obstructive apneahypopnea, oxygen desaturation index, hypercapnia, sleep arousal index
, and percentage of sleep time in fight sleep.
Two commonly used objective measures, obtained by PSG, are the periodic leg movement (PLM) index and the PLM arousal index
His sleep study did not show any "classic" obstructive events, yet he did present with upper airway resistance complete with an arousal index
of over 20/hour and with an associated brady-tachy cardiac rhythm.
The arousal index
was scored as the number of arousals per hour during study period.
The same applies for other measures of severity of sleep apnoea, such as arousal index
or degree of oxygen saturation.
The relative risk of death as a function of each transition index was calculated using proportional hazards models, adjusting for age, gender, body mass index, race, hypertension, cardiovascular disease, smoking status, respiratory disturbance index and arousal index
Children with chronic daily headache had shorter total sleep time, longer sleep latency, shorter REM sleep, and a higher arousal index