Table 1.
Study Characteristics by Country
| Author/s | Country | Study Sample (n=) | Inpatient/ICU | Age, Mean, Years (range) | Male |
|---|---|---|---|---|---|
| Chen et al. | China | 99 | 1 hospital | 55.5 (21–82) | 68% |
| Chen et al. | China | 274 | 1 hospital | Nonsurvivors 68 (IQR 62–77) Survivors 51 (IQR 37–66) |
Nonsurvivors 73% Survivors 55% |
| Du et al. | China | 179 | 1 hospital | 57.6 (18–87) | 54% |
| Guan et al. | China | 1590 | 575 hospitals in China | 48.9 ± 16.3 | 57% |
| Huang et al. | China | 41 | 1 hospital | 49 (IQR 41–58) | 73% |
| Liu et al. | China | 56 | 1 hospital | Older: 68 (IQR 65–70) Younger: 47 (IQR 36–51) |
Older 67% Younger 50% |
| Wu et al. | China | 201 | 1 hospital | 51 (IQR 43–60) | 64% |
| Yan et al. | China | 193 | 1 hospital | 64 (49–73) | 59% |
| Zhang et al. | China | 663 | 1 hospital | 55.6 (23–95) | 48% |
| Zhou et al. | China | 191 | 2 hospitals | 56 (18–87) | 62% |
| Grasselli et al. | Italy | 1591 | 1 ICU patients from 72 hospitals | 63 (14–91) | 82% |
| Graselli et al. | Italy | 3988 | ICU network | 63 (IQR 55–69) | 79.9% |
| Iaccarino et al. | Italy | 1591 | 26 hospitals | Nonsurvivors 80 Survivors 65 |
Nonsurvivors 67% Survivors 64% |
| Onder et al. | Italy | Subsample: 1625 | 19 Italian regions and 2 provinces | 79.5 (SD 8.1) | 70% |
| Korean Society | Republic of Korea | 54 | Country wide | 75.5 (35–93) | 61% |
| Atkins et al. | United Kingdom | 269,070 | UK Biobank | 73.1 (65–86) | 45% |
| Williamson et al. | United Kingdom | 17,278,392 | General practice network | No mean age included | 50% |
| Arentz et al. | United States | 21 | ICU at 1 Hospital | 70 (43–92) | 52% |
| Buckner et al. | United States | 105 | 3 hospitals | 69 (23–97) | 50% |
| Gold et al. | United States | 305 | 8 hospitals | 60 (23–95) | 49% |
| Harrison et al. | United States | 31 461 | 24 health care organizations | 50 (18–90) | 46% |
| McMichael et al. | United States | 129 | Skilled nursing facility | Residents: 81 (54–100) Staff: 42.5 (22–79) |
Patients: 37% Staff: 21% |
| Myers et al. | United States | 377 | 21 hospitals; inpatient/ICU | Overall: 61 (IQR 50–73) Inpatient: 60 (IQR 49–72) ICU: 63(IQR 53–73) |
Overall: 56% Inpatient: 52% ICU: 65% |
| Richardson et al. | United States | 5700 | 12 Hospitals | 63 (0–107) | 60% |
| Stokes et al. | United States | 1,320,488 | Country wide | 48 (IQR 33–63) | 49% |
| Suleyman et al. | United States | 463 | 5 hospitals and 9 EDs in Michigan | 57.5 (SD 16.8) | 44% |
| Tartof et al. | United States | 6916 | Integrated health care system | 49 (IQR 36–60) | 45% |
| Wortham et al. | United States | 62 813 | Country wide | Case-based surveillance 78 (IQR 67–87) Supplemental surveillance 75 (IQR 64–84) |
56% |
Note: ICU = Intensive care unit; IQR = Interquartile range.