rdi4p noplm
Name
ai_all
Label
Arousal Index: Number of arousals per hour of sleep from type II polysomnography
Description

Total number of arousals per hour of sleep. Ratio of count of arousals to total sleep time in hours.

Calculation
ai_all = 60 * ( arrembp + arremop + arnrembp + arnremop ) / slpprdp
Units
events per hour
Type
numeric
Tags
phrnumar_f1t2
Visit number vs Arousal Index: Number of arousals per hour of sleep from type II polysomnography
N Mean StdDev Median Min Max Unknown Total
Visit 8 456 20.7 ± 12.0 18.0 2.4 75.1 5 461
Age (categorical) vs Arousal Index: Number of arousals per hour of sleep from type II polysomnography
Visit 8
N Mean StdDev Median Min Max Unknown Total
Total 450 20.7 ± 11.8 18.0 2.4 75.1 5 455
75-84 years 321 19.6 ± 10.3 17.8 2.4 62.1 4 325
85 years or older 129 23.4 ± 14.7 19.1 3.4 75.1 1 130
Gender vs Arousal Index: Number of arousals per hour of sleep from type II polysomnography
Visit 8
N Mean StdDev Median Min Max Unknown Total
Total 456 20.7 ± 12.0 18.0 2.4 75.1 5 461
Female 456 20.7 ± 12.0 18.0 2.4 75.1 5 461