Three mixed-effects linear models of the difference in oxygen saturations as measured by paired pulse oximetry and ABG and their association with systolic BP, diastolic BP and HR
| Three univariate models (30 min window) | Pulse oximetry−arterial O2 saturation difference | |||
| Patients (n) | Observations (n) | Estimates (95% CI) | P value | |
| Systolic BP (mm Hg) | 3260 | 5546 | −0.02 (−0.03 to −0.00) | 0.043 |
| Diastolic BP (mm Hg) | 3278 | 5590 | −0.03 (−0.05 to −0.00) | 0.047 |
| HR (beats per minute) | 3128 | 5202 | −0.04 (−0.06 to −0.02) | <0.001 |
| Three univariate models (10 min window for sensitivity analysis) | ||||
| Observations (n) | Estimates (95% CI) | P value | ||
| Systolic BP (mm Hg) | 1629 | 2157 | −0.03 (−0.06 to −0.00) | 0.028 |
| Diastolic BP (mm Hg) | 1652 | 2186 | −0.03 (−0.08 to 0.01) | 0.168 |
| HR (beats per minute) | 1542 | 2015 | −0.04 (−0.07 to 0.00) | 0.058 |