Table 5 Summary of models employed in linear regression analysis.
From: Pulse oximetry values from 33,080 participants in the Apple Heart & Movement Study
Model name | Covariates | Model usage |
|---|---|---|
MAge | Age (years) | Comparison with low-altitude univariate SaO2 model (Crapo, et al.3) |
MRef | Age (years) | Comparison with reference SaO2 model (Crapo, et al.3) |
Height (cm) | ||
Weight (kg) | ||
Barometric pressure (mmHg) | ||
Sex (categorical) | ||
M1 | Age–40 (years) | Proposed full-cohort SpO2 linear model |
BMI–25 (kg/m2) | ||
Home altitude (km) | ||
Sex (categorical) | ||
Race/ethnicity (categorical) | ||
M1,sex | Age–40 (years) | Sex-stratified analysis |
BMI–25 (kg/m2) | ||
Home altitude (km) | ||
Race/ethnicity (categorical) | ||
M1,race−ethn. | Age–40 (years) | Race/ethnicity-stratified analysis |
BMI–25 (kg/m2) | ||
Home altitude (km) | ||
Sex (categorical) |
