rdirop5 cai4pa
Name
cai4p
Label
Central Apnea Index 4% oxygen desaturation
Description

Central Apnea Index at 4% oxygen desaturation [(Total number of central apneas associated with >= 4% oxygen desaturation) / (hours of sleep)]

Calculation
cai4p = 60 * ( carbp4 + carop4 + canbp4 + canop4 ) / slpprdp
Units
events per hour
Type
numeric
Tags
cai4p
SHHS Visit Number vs Central Apnea Index 4% oxygen desaturation
N Mean StdDev Median Min Max Unknown Total
Visit 1 4,406 0.3 ± 1.8 0.0 0.0 41.4 1,398 5,804
Visit 2 2,651 0.6 ± 2.6 0.0 0.0 41.2 1,429 4,080
CVD Outcomes - - - - - - 5,042 5,042
Age at SHHS1 vs Central Apnea Index 4% oxygen desaturation
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 4,406 0.3 ± 1.8 0.0 0.0 41.4 1,398 5,804
39.0 to 55.0 years 1,144 0.2 ± 1.2 0.0 0.0 22.3 307 1,451
55.0 to 63.0 years 1,081 0.3 ± 1.4 0.0 0.0 30.9 370 1,451
63.0 to 72.0 years 1,060 0.4 ± 1.9 0.0 0.0 30.7 391 1,451
72.0 to 100.0 years 1,121 0.6 ± 2.6 0.0 0.0 41.4 330 1,451
Gender vs Central Apnea Index 4% oxygen desaturation
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 4,406 0.3 ± 1.8 0.0 0.0 41.4 1,398 5,804
Female 2,269 0.1 ± 0.7 0.0 0.0 25.3 770 3,039
Male 2,137 0.6 ± 2.5 0.0 0.0 41.4 628 2,765
Gender vs Central Apnea Index 4% oxygen desaturation
Visit 2
N Mean StdDev Median Min Max Unknown Total
Total 2,651 0.6 ± 2.6 0.0 0.0 41.2 1,429 4,080
Female 1,425 0.2 ± 1.6 0.0 0.0 35.5 794 2,219
Male 1,226 0.9 ± 3.4 0.0 0.0 41.2 635 1,861
Race vs Central Apnea Index 4% oxygen desaturation
Visit 1
N Mean StdDev Median Min Max Unknown Total
Total 4,406 0.3 ± 1.8 0.0 0.0 41.4 1,398 5,804
white 3,700 0.4 ± 1.9 0.0 0.0 41.4 1,207 4,907
black 397 0.2 ± 1.0 0.0 0.0 12.1 118 515
native amer/alaskan 9 0.1 ± 0.2 0.0 0.0 0.6 2 11
asian/pacific islander 70 0.1 ± 0.3 0.0 0.0 1.6 18 88
hispanic/mex. amer 227 0.2 ± 1.6 0.0 0.0 17.4 53 280
other 3 0.0 ± 0.0 0.0 0.0 0.0 - 3
Race vs Central Apnea Index 4% oxygen desaturation
Visit 2
N Mean StdDev Median Min Max Unknown Total
Total 2,651 0.6 ± 2.6 0.0 0.0 41.2 1,429 4,080
white 2,311 0.6 ± 2.7 0.0 0.0 41.2 1,276 3,587
black 181 0.5 ± 3.1 0.0 0.0 35.5 75 256
native amer/alaskan 3 0.1 ± 0.2 0.0 0.0 0.4 5 8
asian/pacific islander 34 0.07 ± 0.2 0.0 0.0 0.9 14 48
hispanic/mex. amer 121 0.3 ± 1.3 0.0 0.0 11.9 59 180
other 1 0.0 - 0.0 0.0 0.0 - 1