Fig 1.
Visual representation of the included cohorts.
Table 1.
Demographics of included patients and data pairs characteristics.
Fig 2.
Scatterplots of the data pairs of the Prospective Inpatient Acutely ill cohorts and Retrospective Outpatient Pulmonary cohort.
A. Prospective Inpatient Acutely ill cohort (PIA cohort) and B. Retrospective Outpatient Pulmonary cohort (ROP cohort). The black dashed vertical lines reflect the PaO2 values of 60 mmHg and 125 mmHg. The red dashed vertical lines reflect the calculated lower and upper bounds to avoid hypoxemic and hyperoxemic PaO2 measurements.
Fig 3.
Multilevel analysis of the Prospective Inpatient Acutely ill and Retrospective Outpatient Pulmonary cohort.
PIA, Prospective Inpatient Acutely ill cohort. ROP, Retrospective Outpatient Pulmonary cohort. The black curve represents the Prospective Inpatient Acutely Ill cohort with a 95% prediction interval (black dashed line). The blue curve represents the Retrospective Outpatient Pulmonary cohort with a 95% prediction interval (blue dashed line).
Fig 4.
Stacked bar plots of the number and percentage of PaO2 values at every SpO2 value.
A. Prospective Inpatient Acutely ill cohort (PIA cohort) and B. Retrospective Outpatient Pulmonary cohort (ROP cohort). The left y-axis represents the number of data points and the right y-axis represents the percentage of data points per SpO2 value of the total number of measurements in the whole cohort. PaO2 values are divided into three groups: < 60 mmHg (blue), 60–125 mmHg (gray) and > 125 mmHg (red).