Table 5.
Univariate and logistic regression analysis for 28-day mortality of cardiac arrest patients
| Variable | Univariate analysis Odds ratio (95% CI) | P | Logistic regression Odds ratio (95% CI) | P |
|---|---|---|---|---|
| Age, yearsa | 1.02 (1.01–1.03) | 0.002 | 1.01 (1.00–1.03) | 0.010 |
| SAPS II score, pointsa | 1.03 (1.02–1.03) | <0.001 | ||
| Glasgow Coma Scale, pointsb | 0.92 (0.88–0.95) | <0.001 | ||
| PaO2 60–300 mmHgb | 1 (reference) | 1 (reference) | ||
| PaO2 <60 mmHg | 2.23 (1.05–4.72) | 0.036 | 2.71 (1.06–6.95) | 0.038 |
| PaO2 ≥300 mmHg | 1.19 (0.76–1.85) | 0.444 | 0.89 (0.54–1.46) | 0.640 |
| pHa 7.35–7.45b | 1 (reference) | 1 (reference) | ||
| Acidosis (pHa <7.35) | 1.48 (1.07–2.04) | 0.017 | 1.40 (0.98–2.02) | 0.068 |
| Alkalosis (pHa >7.45) | 1.07 (0.67–1.71) | 0.770 | 1.20 (0.71–2.02) | 0.491 |
| PaCO2 35–45 mmHgb | 1 (reference) | |||
| PaCO2 <35 mmHg | 1.20 (0.86–1.68) | 0.277 | ||
| PaCO2 >45 mmHg | 0.94 (0.70–1.41) | 0.973 | ||
| Tidal Volume/PBWml/kgb | ||||
| Tidal Volume/PBW 6–8 ml/kg | 1 (reference) | |||
| Tidal Volume/PBW <6 ml/kg | 1.01 (0.51–2.02) | 0.975 | ||
| Tidal Volume/PBW >8 ml/kg | 0.76 ( 0.55–1.06) | 0.111 | ||
| PEEP cmH2Ob | ||||
| PEEP 6–8 cmH2O | 1 (reference) | |||
| PEEP <6 cmH2O | 1.35 (0.94–1.95) | 0.100 | ||
| PEEP >8 cmH20 | 0.86 (0.52–1.42) | 0.556 | ||
| Pplat cmH2Ob | ||||
| Pplat 28–30 cmH2O | 1 (reference) | |||
| Pplat <28 cmH2O | 0.58 (0.28–1.22) | 0.149 | ||
| Pplat >30 cmH2O | 0.64 (0.22–1.89) | 0.421 | ||
| Use of sedative drugsb | 0.61 (0.46–0.81) | 0.001 | 0.51 (0.36–0.72) | 0.000 |
| Cardiovascular failure/shock (yes/no)b,c | 1.53 (1.15–2.03) | <0.001 | 1.65 (1.17–2.32) | 0.004 |
| ARDS (yes/no)b,c | 3.14 (1.41–6.97) | 0.005 | ||
| Renal failure (yes/no)b,c | 1.35 (0 .95–1.91) | 0.095 | 1.34 (0.91–1.95) | 0.135 |
| Hepatic failure (yes/no)b,c | 1.20 (0.72–2.00) | 0.483 | ||
| Sepsis (yes/no)b,c | 1.38 (0.88–2.18) | 0.163 | ||
| Hematologic failure (yes/no)b,c | 1.05 (0.51–2.17) | 0.885 |
SAPS, Simplified Acute Physiology Score; PBW, predicted body weight; ml, milliliters; kg, kilograms PEEP, positive end-expiratory pressure; Pplat, plateau pressure; pHa, arterial pH; ARDS, acute respiratory distress syndrome; PaO2, partial pressure of oxygen in arterial blood; PaCO2, partial pressure of carbon dioxide in arterial blood; CI, confidence interval.
aAge and SAPS score were collected as baseline characteristics, bValues within 24 hours from admission, cthe absence of organ failure as the reference value.