quabdo quchest
Name
quair
Label
Quality of the airflow signal
Description

Sleep Heart Health Study Visit 2 (SHHS2)-These vary from 1 (poorest) to 5 (best) and reflect the proportion of sleep time the signals were useable. Useable respiratory data is defined as the number of hours that abnormal breaths can be distinguished from normal breaths.

Domain
sigqual2
  • 1: Less than 25% of time with artifact-free signal
  • 2: 25-49% of time with artifact-free signal
  • 3: 50-74% of time with artifact-free signal
  • 4: 75-94% of time with artifact-free signal
  • 5: Entire sleep time (at least 95%) artifact-free
Type
choices
Quality of the airflow signal vs Sleep Heart Health Study (SHHS) Visit Number
Visit 1 Interim Follow-up Visit Visit 2 CVD Outcomes
Total - - 4,080 -
Less than 25% of time with artifact-free signal - - 67 -
25-49% of time with artifact-free signal - - 94 -
50-74% of time with artifact-free signal - - 233 -
75-94% of time with artifact-free signal - - 689 -
Entire sleep time (at least 95%) artifact-free - - 1,568 -
Unknown - - 1,429 -
Quality of the airflow signal vs Gender
Visit 2
Male Female Total
Total 1,861 2,219 4,080
Less than 25% of time with artifact-free signal 32 35 67
25-49% of time with artifact-free signal 41 53 94
50-74% of time with artifact-free signal 102 131 233
75-94% of time with artifact-free signal 308 381 689
Entire sleep time (at least 95%) artifact-free 743 825 1,568
Unknown 635 794 1,429
Quality of the airflow signal vs Race
Visit 2
White Black Other Total
Total 3,587 256 237 4,080
Less than 25% of time with artifact-free signal 59 4 4 67
25-49% of time with artifact-free signal 85 6 3 94
50-74% of time with artifact-free signal 200 19 14 233
75-94% of time with artifact-free signal 609 37 43 689
Entire sleep time (at least 95%) artifact-free 1,358 115 95 1,568
Unknown 1,276 75 78 1,429