Histogram

Quality of the oximetry 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 - - 1 -
25-49% of time with artifact-free signal - - 2 -
50-74% of time with artifact-free signal - - 4 -
75-94% of time with artifact-free signal - - 64 -
Entire sleep time (at least 95%) artifact-free - - 2,580 -
Unknown - - 1,429 -
Quality of the oximetry 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 - 1 1
25-49% of time with artifact-free signal - 2 2
50-74% of time with artifact-free signal 2 2 4
75-94% of time with artifact-free signal 39 25 64
Entire sleep time (at least 95%) artifact-free 1,185 1,395 2,580
Unknown 635 794 1,429
Quality of the oximetry 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 1 - - 1
25-49% of time with artifact-free signal 2 - - 2
50-74% of time with artifact-free signal 3 - 1 4
75-94% of time with artifact-free signal 52 8 4 64
Entire sleep time (at least 95%) artifact-free 2,253 173 154 2,580
Unknown 1,276 75 78 1,429