TABLE 1.
Characteristics of Arterial Blood Gas Samples and Paired-Pulse Oximetry by Race Group
| Characteristics | Sao2–Spo2 Pairs Grouped by Race Group | ||||
|---|---|---|---|---|---|
| Missing | Black | Other | White | Overall | |
| n | 232 | 24 | 265 | 521 | |
| Sao2, mean (sd) | 0 | 95.6 (2.4) | 95.9 (2.0) | 95.8 (2.2) | 95.7 (2.3) |
| Spo2, mean (sd) | 0 | 97.2 (3.1) | 97.7 (2.2) | 97.3 (2.9) | 97.3 (2.9) |
| Sao2–Spo2, mean (sd) | 0 | –1.6 (1.9) | –1.8 (1.8) | –1.5 (2.4) | –1.6 (2.1) |
| First-day Sequential Organ Failure Assessment, median (Q1, Q3) | 159 | 9.0 (7.0, 11.0) | 6.0 (6.0, 8.0) | 10.0 (6.0, 15.0) | 10.0 (6.0, 11.0) |
| Sex (female), n (%) | 0 | 91 (39.2) | 3 (12.5) | 107 (40.4) | 201 (38.6) |
| pH, mean (sd) | 39 | 7.4 (0.1) | 7.4 (0.1) | 7.4 (0.1) | 7.4 (0.1) |
| Heart rate, mean (sd) | 8 | 93.5 (18.9) | 94.1 (15.5) | 96.1 (19.6) | 94.8 (19.1) |
| Main arterial pressure, mean (sd) | 19 | 81.7 (17.9) | 95.8 (54.1) | 81.4 (33.5) | 82.2 (29.3) |
| Sodium, mean (sd) | 15 | 139.0 (5.3) | 138.2 (2.7) | 137.5 (5.7) | 138.2 (5.4) |
| Platelet, mean (sd) | 28 | 180.1 (102.5) | 279.8 (186.4) | 202.2 (125.8) | 195.9 (121.3) |
| Potassium, mean (sd) | 14 | 4.1 (0.6) | 3.9 (0.6) | 4.0 (0.5) | 4.1 (0.6) |
| Blood urea nitrogen, mean (sd) | 26 | 24.3 (17.4) | 20.2 (11.0) | 31.8 (22.7) | 27.9 (20.4) |
| WBC, mean (sd) | 44 | 13.9 (7.1) | 17.2 (7.6) | 14.5 (8.7) | 14.4 (8.0) |
| Creatinine, mean (sd) | 26 | 1.5 (1.0) | 1.5 (1.4) | 1.9 (1.4) | 1.7 (1.3) |
| Glucose, mean (sd) | 9 | 152.7 (54.1) | 138.3 (27.6) | 151.6 (58.4) | 151.5 (55.4) |
| Bicarbonate, mean (sd) | 26 | 24.7 (3.8) | 23.7 (3.0) | 23.7 (5.0) | 24.1 (4.4) |
| Chloride, mean (sd) | 26 | 105.3 (6.1) | 105.5 (4.4) | 103.8 (6.5) | 104.6 (6.3) |
| Hemoglobin, mean (sd) | 15 | 10.0 (1.9) | 11.2 (1.3) | 9.5 (1.6) | 9.8 (1.8) |
| Norepinephrine equivalent dose (µg/kg/min), mean (sd) | 0 | 0.1 (0.1) | 0.0 (0.0) | 0.1 (0.1) | 0.1 (0.1) |
This table depicts the pair-level characteristics of the obtained cohort, in terms of sex distribution, pulse oximetry, and arterial blood gas measurements, as well as paired laboratory test values. The latter present missingness due to the applied pairing criteria; nevertheless, covariates’ missingness is always < 10% (in the 521 pairs).