Table 2.
Relationships between measurement differences (|PaCO2-PtCO2 |) and patient characteristics using univariate and multivariate analysis (ANCOVA)
| Univariate analysis | Multivariate analysis | |||
|---|---|---|---|---|
| Variable | OR [95 % CIs] | P-value | OR [95 % CIs] | P-value |
| Sex | 1.61 [0.18, 14.25] | .66 | ||
| Past medical history | ||||
| Acute pulmonary | 0.29 [0.03, 2.96] | .29 | ||
| edema | ||||
| COPD | 0.60 [0.06, 6.18] | .67 | ||
| Ischemic heart | 0.75 [0.06, 8.91] | .82 | ||
| disease | ||||
| Home oxygen | 1.01 [0.06, 16.77] | .99 | ||
| Heart rate | 0.98 [0.94, 1.03] | .40 | ||
| Systolic blood | 1.01 [0.97, 1.05] | .60 | ||
| pressure | ||||
| Diastolic blood | 0.97 [0.91, 1.03] | .33 | ||
| pressure | ||||
| Respiratory rate | 1.01 [0.88, 1.18] | .85 | ||
| Temperature | 2.45 [0.93, 6.49] | .07 | 3.01 [1.16, 7.80] | .03 |
| PaCO2 | 1.05 [1.00, 1.12] | .06 | 1.06 [1.00, 1.12] | .05 |
| PtCO2 | 1.06 [1.00, 1.13] | .06 | ||
| PaO2 | 1.21 [1.01, 1.45] | .04 | 1.22 [1.02, 1.47] | .03 |
| HCO3 | 0.96 [0.80, 1.15] | .64 | ||
| Base excess | 0.96 [0.82, 1.12] | .60 | ||
| Lactate | 1.44 [0.43, 4.79] | .54 | ||
| Hemoglobin | 1.20 [0.74, 1.95] | .45 | ||
| White blood cells | 0.91 [0.74, 1.12] | .38 | ||
| C-reactive protein | 1.00 [0.99, 1.01] | .72 | ||
| Glycemia | 4.70 [0.62, 35.58] | .13 | ||
| Brain natriuretic | 1.00 [1.00, 1.00] | .82 | ||
| vpeptide | ||||