Name

rdi4p

Label

Overall RDI at 4% oxygen desaturation

Description

Respiratory Disturbance Index at 4% oxygen desaturation. 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. [(Total number of apneas and hypopneas associated with >= 4% oxygen desaturation) / (hours of sleep)]

Calculation

rdi4p = 60 * ( hrembp4 + hrop4 + hnrbp4 + hnrop4 + carbp4 + carop4 + canbp4 + canop4 + oarbp4 + oarop4 + oanbp4 + oanop4 ) / slpprdp

Units

events per hour

Type

numeric

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Visit 1	5,804	8.7	± 12.4	4.2	0.0	148.8	-	5,804
Visit 2	2,651	10.5	± 13.1	5.9	0.0	116.0	1,429	4,080
CVD Outcomes	-	-	-	-	-	-	5,042	5,042

	N	Mean	StdDev	Median	Max	Unknown	Total
Total	5,804	8.7	± 12.4	4.2	148.8	-	5,804
39.0 to 55.0 years	1,451	6.7	± 12.2	2.3	115.7	-	1,451
55.0 to 63.0 years	1,451	8.2	± 12.0	3.7	97.4	-	1,451
63.0 to 72.0 years	1,451	9.8	± 12.9	5.5	115.1	-	1,451
72.0 to 100.0 years	1,451	9.9	± 12.3	5.7	148.8	-	1,451

	N	Mean	StdDev	Median	Max	Unknown	Total
Total	5,804	8.7	± 12.4	4.2	148.8	-	5,804
Female	3,039	6.2	± 10.2	2.6	148.8	-	3,039
Male	2,765	11.4	± 14.0	6.5	115.7	-	2,765

	N	Mean	StdDev	Median	Max	Unknown	Total
Total	2,651	10.5	± 13.1	5.9	116.0	1,429	4,080
Female	1,425	8.0	± 10.9	4.4	92.1	794	2,219
Male	1,226	13.4	± 14.7	8.3	116.0	635	1,861

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Total	5,804	8.7	± 12.4	4.2	0.0	148.8	-	5,804
white	4,907	8.7	± 12.4	4.3	0.0	148.8	-	4,907
black	515	9.2	± 14.1	3.6	0.0	111.6	-	515
native amer/alaskan	11	5.9	± 4.2	5.0	0.8	13.9	-	11
asian/pacific islander	88	6.2	± 9.5	2.4	0.0	46.8	-	88
hispanic/mex. amer	280	7.8	± 11.2	3.4	0.0	67.5	-	280
other	3	4.8	± 7.1	1.1	0.4	13.0	-	3

Sleep Heart Health Study