Table 1.
Characteristic of the studies included in the metanalysis.
| Reference | Year | Study design | Country | Study population | Study period | Patients, n | Male, n (%) | Age, median (IQR) or mean, years | Mortality rate (%) |
|---|---|---|---|---|---|---|---|---|---|
| Chen et al. [5] | 2020 | Retrospective case series | China | Moderately to severely ill or critically ill patients with confirmed COVID-19 | January 31, 2020–February 12, 2020 | 274 (113 non-survivors and 161 survivors) | 171 (62) | 62 (44–70) | 14.1 |
| Tang et al. (A) [11] | 2020 | Retrospective, single-center cohort study | China | Consecutive patients with confirmed COVID-19 admitted in a single center | January 1, 2020–February 13, 2020 | 183 (21 non-survivors and 162 survivors) | 98 (53.5) | 54.1 ± 16.2 | 11.5 |
| Tang et al. (B) [17] | 2020 | Retrospective, single-center cohort study | China | Consecutive patients with confirmed severe COVID-19 admitted in a single center | January 1, 2020–February 13, 2020 | 449 (134 non-survivors and 315 survivors | 268 (59.6) | 65.1 ± 12 | 29.8 |
| Tu et al. [18] | 2020 | Retrospective, single-center cohort study | China | Consecutive patients with confirmed severe COVID-19 admitted in a single center | January 3, 2020–February 24, 2020 | 174 (25 non-survivors and 149 survivors | 79 (45.5) | NR | 14.4 |
| Wu et al. [6] | 2020 | Retrospective, single-center cohort study | China | Consecutive patients with confirmed COVID-19 admitted in a single center | December 25, 2019–Januray 26, 2020 Follow-up until February 13, 2020 | 201 including 84 patients with ADRS: 44 non-survivors and 40 survivors) | 128 (63.7) | 51 (43–60) | 21.9 |
| Zhou et al. [7] | 2020 | Retrospective, multicenter cohort study | China | Consecutive patients with confirmed COVID-19 admitted in 2 centers | December 29, 2019–Januray 31, 2020 | 191 (54 non-survivors and 137 survivors) | 119 (62) | 56 (46–67) | 28.2 |
ADRS: acute detress respiratory syndrom; COVID-19: Coronavirus Disease 2019; IQR: interquartile range; NR: not reported.