Table 2.
Baseline characteristics of the patients.
| Values | Missing data (%) | |
|---|---|---|
| Age (mean ± SD) | 52.21 ± 20.00 | 0 |
| Sex (male), n (%) | 142,208 (46.9) | 0 |
| Visit method (EMS), n (%) | 76,497 (25.2) | 0 |
| Past medical history, n (%) | ||
| Hypertension | 28.54 | 1.35 |
| Diabetes mellitus | 15.68 | 1.35 |
| Pulmonary tuberculosis | 2.54 | 1.36 |
| Hepatitis | 3.2 | 1.37 |
| Allergies | 2.23 | 1.37 |
| Operative history | 23.96 | 1.48 |
| Initial vital signs at arrival (mean ± SD) | ||
| Systolic blood pressure (mmHg) | 132.60 ± 26.60 | 1.45 |
| Diastolic blood pressure (mmHg) | 77.49 ± 14.72 | 1.45 |
| Pulse rate (/min) | 87.81 ± 18.66 | 1.44 |
| Respiratory rate (/min) | 17.03 ± 2.67 | 1.44 |
| Oxygen saturation (%) | 97.60 ± 7.42 | 2.62 |
| Body temperature (°C) | 36.78 ± 1.65 | 1.28 |
| Mental status at arrival, n (%) | 0 | |
| Alert | 291,868 (96.2) | |
| Drowsy | 5038 (1.7) | |
| Stupor | 2361 (0.8) | |
| Semicoma | 338 (0.1) | |
| Coma | 468 (0.2) | |
| Sedated | 3272 (1.1) | |
| Outcome, n (%) | ||
| Intubation | 2196 (0.7) | |
| Inotropic use | 6939 (2.3) | |
| ICU admission | 7914 (2.6) | |
| IHCA | 543 (0.0) | |
SD standard deviation, EMS emergency medical services, ICU intensive care unit, IHCA in-hospital cardiac arrest.