queeg1 queogl
Name
queeg2
Label
Quality of the EEG2 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. EEG/EOG/EMG data are defined by the number of hours that sleep stages can be distinguished from awake.

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 EEG2 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 - - 108 -
25-49% of time with artifact-free signal - - 65 -
50-74% of time with artifact-free signal - - 129 -
75-94% of time with artifact-free signal - - 406 -
Entire sleep time (at least 95%) artifact-free - - 1,943 -
Unknown - - 1,429 -
Quality of the EEG2 signal vs Gender of the participant
Visit 2
Male Female Total
Total 1,861 2,219 4,080
Less than 25% of time with artifact-free signal 56 52 108
25-49% of time with artifact-free signal 28 37 65
50-74% of time with artifact-free signal 68 61 129
75-94% of time with artifact-free signal 207 199 406
Entire sleep time (at least 95%) artifact-free 867 1,076 1,943
Unknown 635 794 1,429
Quality of the EEG2 signal vs Race of the participant
Visit 2
White Black Other Total
Total 3,587 256 237 4,080
Less than 25% of time with artifact-free signal 90 14 4 108
25-49% of time with artifact-free signal 52 9 4 65
50-74% of time with artifact-free signal 114 9 6 129
75-94% of time with artifact-free signal 351 36 19 406
Entire sleep time (at least 95%) artifact-free 1,704 113 126 1,943
Unknown 1,276 75 78 1,429