Table 2

Multivariable models with oxygen saturation asleep

Dependent variable/independent covariatesParameter estimateStandardized coefficientP
LV mass index, g/m2.7 (R2 = 0.66, P < .001)
    Oxygen saturation asleep, percentage−2.1−0.60< .001
    Age, y−0.73−0.26.02
    Systolic blood pressure percentile0.100.24.03
    Arousal index0.480.18.09
LV diastolic dimension Z-score (R2 = 0.74, P < .001)
    Oxygen saturation asleep, percentage−0.18−0.43< .001
    Sleep maintenance efficiency, percentage−0.06−0.48< .001
    Systolic blood pressure percentile0.020.42.001
    Heart rate−0.04−0.38.006
    Oxygen desaturation index0.030.32.007
    Body mass index percentile−0.01−0.25.02
    Arginine-ornithine ratio0.220.22.05
LV E/E′ (R2 = 0.4, P < .001)
    Oxygen saturation asleep, percentage−0.46−0.63< .001
    Oxygen desaturation index−0.04−0.31.03
  • Multivariable models of LV mass index, LV diastolic dimension Z-score, and LV E/E′ with oxygen saturation asleep, other sleep variables, and confounding independent variables for 44 study subjects. Sleep variables as potential independent variables: arousal index, sleep maintenance efficiency, OAHI at 3% desaturation, average oxygen saturation asleep, and oxygen desaturation index. Potential confounding variables evaluated: hemoglobin, LDH, arginine-ornithine ratio, age, heart rate, systolic and diastolic blood pressure percentiles, and body mass index percentile.