Table 1 Tabulated comparison of reference SaO2 linear model coefficients (top row of coefficients; adapted from ref. 3) with results obtained from equivalent fits to daytime mean SpO2 (bottom row of coefficients) using only low-altitude subjects (estimated home altitude < 155m) from our data set.
From: Pulse oximetry values from 33,080 participants in the Apple Heart & Movement Study
Univariate regression results for blood oxygen saturation (low-altitude subjects only) | ||||
---|---|---|---|---|
Model | R2 | SEE | Constant | Age (years) |
Reference univariate SaO2 (Crapo et al.3) | 0.32 | 0.85 | 97.66 | −0.0296 |
Daytime SpO2 (low-alt. subjects) | 0.12 | 1.14 | 97.65 (97.57, 97.74)) [p < 1.0e−10] | −0.0322 (−0.0341, −0.0303)) [p < 1.0e−10] |