Name

rdi4p

Label

Overall RDI at 4% oxygen desaturation

Description

Ratio of the count of all apneas (central and obstructive) and hypopneas associated with at least a 4% oxygen desaturation to the total sleep time expressed in hours

Calculation
rdi4p = 60 * ( hrembp4 + hrop4 + hnrbp4 + hnrop4 + carbp4 + carop4 + canbp4 + canop4 + oarbp4 + oarop4 + oanbp4 + oanop4 ) / slpprdp
Units
events per hour
Type
numeric
Visit vs Overall RDI at 4% oxygen desaturation
N Mean StdDev Median Min Max Unknown Total
Visit 5 732 9.2 ± 17.4 1.8 0.0 110.6 3 735
Age at time of visit vs Overall RDI at 4% oxygen desaturation
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 655 9.1 ± 17.1 1.8 0.0 110.6 3 658
5-14 yrs old 64 1.3 ± 4.4 0.3 0.0 25.5 - 64
15-24 yrs old 112 1.6 ± 4.1 0.4 0.0 36.3 - 112
25-34 yrs old 62 9.4 ± 21.6 1.2 0.0 106.2 - 62
35-44 years 97 11.6 ± 20.3 2.7 0.0 110.6 1 98
45-54 years 146 11.4 ± 19.7 4.0 0.0 105.0 2 148
55-64 years 84 11.4 ± 16.6 6.0 0.0 97.6 - 84
65-74 years 57 13.4 ± 14.6 7.3 0.0 55.0 - 57
75-84 years 31 17.6 ± 19.5 10.9 0.0 72.6 - 31
85 years or older 2 28.1 ± 36.6 28.1 2.2 54.0 - 2
Sex vs Overall RDI at 4% oxygen desaturation
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 732 9.2 ± 17.4 1.8 0.0 110.6 3 735
Female 403 6.2 ± 12.6 1.3 0.0 101.2 3 406
Male 329 12.9 ± 21.4 3.1 0.0 110.6 - 329
Race vs Overall RDI at 4% oxygen desaturation
Visit 5
N Mean StdDev Median Min Max Unknown Total
Total 732 9.2 ± 17.4 1.8 0.0 110.6 3 735
White 302 9.2 ± 17.9 1.6 0.0 110.6 2 304
Black 408 9.6 ± 17.4 2.2 0.0 106.2 1 409
Other 22 2.5 ± 7.3 0.3 0.0 34.3 - 22