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Variables

Old Version You are viewing variable information that is kept around for historical purposes only. The latest version v0.20.0 is available here.

Name

oai4p

Label

Obstructive Apnea Index 4% oxygen desaturation

Description

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

Calculation

oai4p = 60 * ( oarbp4 + oarop4 + oanbp4 + oanop4 ) / slpprdp

Units

events per hour

Type

numeric

	N	Mean	StdDev	Median	Min	Max	Unknown	Total
Visit 1	5,106	2.7	± 6.6	0.4	0.0	88.8	698	5,804
Visit 2	2,651	2.9	± 6.4	0.5	0.0	66.3	1,429	4,080
CVD Outcomes	-	-	-	-	-	-	5,042	5,042

	N	Mean	StdDev	Median	Max	Unknown	Total
Total	5,106	2.7	± 6.6	0.4	88.8	698	5,804
39.0 to 55.0 years	1,275	1.8	± 6.5	0.1	88.8	176	1,451
55.0 to 63.0 years	1,309	2.4	± 6.5	0.3	74.1	142	1,451
63.0 to 72.0 years	1,272	3.2	± 7.3	0.6	85.0	179	1,451
72.0 to 100.0 years	1,250	3.4	± 6.1	0.9	51.4	201	1,451

	N	Mean	StdDev	Median	Max	Unknown	Total
Total	5,106	2.7	± 6.6	0.4	88.8	698	5,804
Female	2,664	1.6	± 4.6	0.2	76.1	375	3,039
Male	2,442	3.9	± 8.2	0.8	88.8	323	2,765

	N	Mean	StdDev	Median	Max	Unknown	Total
Total	2,651	2.9	± 6.4	0.5	66.3	1,429	4,080
Female	1,425	2.0	± 4.7	0.3	66.3	794	2,219
Male	1,226	3.9	± 7.8	0.9	61.9	635	1,861

	N	Mean	StdDev	Median	Max	Unknown	Total
Total	5,106	2.7	± 6.6	0.4	88.8	698	5,804
white	4,327	2.7	± 6.5	0.4	85.0	580	4,907
black	437	3.3	± 8.1	0.4	88.8	78	515
native amer/alaskan	10	0.7	± 0.8	0.4	2.1	1	11
asian/pacific islander	80	2.4	± 6.0	0.1	39.9	8	88
hispanic/mex. amer	250	2.2	± 6.4	0.2	50.7	30	280
other	2	1.6	± 2.2	1.6	3.2	1	3

Sleep Heart Health Study