Table 5. Logistic Regression Results for Outcome Survival to Hospital Discharge and MRS.
Results, reported as Odds Ratios with 95% Confidence Intervals, are shown for 4 multivariable logistic regression models covering 2 outcomes (Survival & Modified Rankin Score >=3) and 2 overlapping patient subsets (those with any ROSC in prehospital phase & those with ROSC at emergency department arrival).
| Outcome | Survival | MRS<3 | ||
|---|---|---|---|---|
| Population | ROSC in PH n=7332 |
ROSC at ED n=5362 |
ROSC in PH n=7282 |
ROSC at ED n=5315 |
| No prehospital Rearrest | reference | reference | reference | reference |
| Prehospital Rearrest | 0.21 (0.18, 0.25) | 0.43 (0.36, 0.51) | 0.24 (0.20, 0.28) | 0.46 (0.38, 0.55) |
| Female | reference | reference | reference | reference |
| Male | 1.44 (1.24, 1.67) | 1.47 (1.26, 1.72) | 1.38 (1.18, 1.63) | 1.38 (1.17, 1.64) |
| Age <60 | reference | reference | reference | reference |
| Age >=60 | 0.43 (0.37, 0.49) | 0.40 (0.35, 0.47) | 0.38 (0.33, 0.45) | 0.36 (0.31, 0.42) |
| Bystander witnessed | reference | reference | reference | reference |
| Not witnessed | 0.63 (0.55, 0.73) | 0.63 (0.54, 0.73) | 0.62 (0.53, 0.74) | 0.63 (0.53, 0.75) |
| No bystander CPR | reference | reference | reference | reference |
| Bystander CPR | 1.11 (0.97, 1.28) | 1.08 (0.93, 1.25) | 1.14 (0.98, 1.32) | 1.10 (0.94, 1.29) |
| Private location | reference | reference | reference | reference |
| Public location | 1.81 (1.56, 2.11) | 1.89 (1.60, 2.22) | 2.03 (1.73, 2.38) | 2.10 (1.77, 2.48) |
| Cardiac etiology | reference | reference | Reference | reference |
| Noncardiac etiology | 1.89 (1.31, 2.71) | 1.79 (1.23, 2.61) | 1.75 (1.14, 2.68) | 1.64 (1.06, 2.54) |
| Initial rhythm VT/VF | 12.9 (10.3, 16.0) | 12.4 (9.84, 15.6) | 16.4 (12.4, 21.5) | 15.7 (11.9, 20.8) |
| Initial rhythm PEA | 3.05 (2.40, 3.86) | 3.13 (2.45, 4.00) | 3.28 (2.43, 4.43) | 3.35 (2.46, 4.55) |
| Initial rhythm Asystole | reference | reference | reference | reference |
| Initial rhythm No Shock | 2.48 (1.72, 3.58) | 2.69 (1.85, 3.92) | 2.65 (1.69, 4.15) | 2.80 (1.77, 4.43) |
| Time to 1st Agency Arrival <6 min | 1.01 (0.87, 1.16) | 1.00 (0.86, 1.16) | 1.11 (0.95, 1.29) | 1.11 (0.94, 1.30) |
| Time to 1st Agency arrival >=6 min | reference | reference | reference | reference |
| Time to ROSC < 30 min | reference | reference | reference | reference |
| Time to ROSC >= 30 min | 0.18 (0.14, 0.23) | 0.19 (0.15, 0.25) | 0.17 (0.13, 0.23) | 0.18 (0.14, 0.24) |
| CCF <0.90 | reference | reference | reference | reference |
| CCF >0.90 | 0.98 (0.83, 1.16) | 0.98 (0.82, 1.17) | 0.86 (0.71, 1.04) | 0.87 (0.71, 1.05) |
| Mean Compression Rate <100 | reference | reference | reference | reference |
| Mean Compression Rate 100–120 | 0.85 (0.70, 1.04) | 0.85 (0.69, 1.04) | 0.88 (0.71, 1.09) | 0.87 (0.69, 1.09) |
| Mean Compression Rate >120 | 0.95 (0.75, 1.21) | 0.97 (0.75, 1.25) | 0.94 (0.72, 1.22) | 0.94 (0.72, 1.24) |
| Site A | reference | reference | reference | reference |
| Site B | 1.00 (0.64, 1.57) | 1.08 (0.66, 1.75) | 0.87 (0.51, 1.50) | 0.92 (0.52, 1.63) |
| Site C | 0.47 (0.23, 0.96) | 0.40 (0.19, 0.85) | 0.70 (0.30, 1.62) | 0.55 (0.22, 1.37) |
| Site D | 1.24 (0.81, 1.88) | 1.15 (0.74, 1.79) | 1.89 (1.15, 3.11) | 1.82 (1.08, 3.06) |
| Site E | 1.24 (0.79, 1.96) | 1.28 (0.79, 2.07) | 1.45 (0.84, 2.50) | 1.47 (0.83, 2.61) |
| Site F | 1.03 (0.69, 1.56) | 1.02 (0.66, 1.57) | 2.35 (1.44, 3.84) | 2.44 (1.46, 4.08) |
| Site G | 0.70 (0.47, 1.05) | 0.70 (0.46, 1.08) | 1.63 (1.01, 2.65) | 1.72 (1.03, 2.86) |
| Site H | 0.78 (0.51, 1.19) | 0.79 (0.50, 1.24) | 1.62 (0.98, 2.68) | 1.77 (1.04, 3.00) |
Abbreviations: CCF – Chest Compression Fraction, CPR – Cardiopulmonary Resuscitation, ED – Emergency Department, MRS – Modified Rankin Score, PEA – Pulseless Electrical Activity, PH – Prehospital, ROSC – Return of Spontaneous Circulation, VF/VT – Ventricular Fibrillation / Ventricular Tachycardia