Sleep Heart Health Study

/datasets/shhs/variables/oximdur /datasets/shhs/variables/period

Quality of the oximetry signal

Domain
sigqual
  • 1: Less than 2 hours of artifact-free signal
  • 2: At least 2 hours but less than 4 hours of artifact-free signal
  • 3: At least 4 hours but less than 6 hours of artifact-free signal
  • 4: At least 6 hours of artifact-free signal
Type choices

Quality of the oximetry signal vs SHHS Visit Number

Visit 1 Interim Follow-up Visit Visit 2 CVD Outcomes
Total 5,804 - - -
Less than 2 hours of artifact-free signal 3 - - -
At least 2 hours but less than 4 hours of artifact-free signal 4 - - -
At least 4 hours but less than 6 hours of artifact-free signal 623 - - -
At least 6 hours of artifact-free signal 5,174 - - -

Quality of the oximetry signal vs Age at SHHS1

Visit 1
35-44 years 45-54 years 55-64 years 65-74 years 75-84 years 85 years or older Total
Total 342 1,017 1,769 1,617 955 104 5,804
Less than 2 hours of artifact-free signal - - - 2 1 - 3
At least 2 hours but less than 4 hours of artifact-free signal 1 - 1 - 1 1 4
At least 4 hours but less than 6 hours of artifact-free signal 45 93 191 169 114 11 623
At least 6 hours of artifact-free signal 296 924 1,577 1,446 839 92 5,174

Quality of the oximetry signal vs Gender

Visit 1
Male Female Total
Total 2,765 3,039 5,804
Less than 2 hours of artifact-free signal 2 1 3
At least 2 hours but less than 4 hours of artifact-free signal 2 2 4
At least 4 hours but less than 6 hours of artifact-free signal 318 305 623
At least 6 hours of artifact-free signal 2,443 2,731 5,174

Quality of the oximetry signal vs Race

Visit 1
White Black Other Total
Total 4,907 515 382 5,804
Less than 2 hours of artifact-free signal 3 - - 3
At least 2 hours but less than 4 hours of artifact-free signal 4 - - 4
At least 4 hours but less than 6 hours of artifact-free signal 504 82 37 623
At least 6 hours of artifact-free signal 4,396 433 345 5,174