Table 1.
General characteristics of included studies.
| Period | Sex | comorbidities | Drug treatment | |||||||||||
| Author | Year | (2019/12–2020/04) | Area | Cases | Ages | Male | Female | L | H | D | Antib | Antiv | Tcm | NOS |
| Cai QX et al. | 2020 | 01/11–03/07 | Non-Wuhan | 417 | 47 (34–60) | 198 | 219 | 21 | 58 | 23 | 47 | 288 | 272 | 6 |
| Cao JL et al. | 2020 | 01/03–02/01 | Wuhan | 102 | 54 (37–67) | 53 | 49 | 2 | 28 | 11 | 101 | 100 | 3 | 7 |
| Cao M et al. | 2020 | 01/20–02/15 | Non-Wuhan | 198 | 50.1 ± 16.3 | 101 | 97 | 6 | 42 | 15 | N | N | N | 6 |
| Cao WL et al. | 2020 | 01/01–02/16 | Non-Wuhan | 128 | N | 60 | 68 | N | N | N | N | N | N | 5 |
| Chen G et al. | 2020 | N-01/27 | Wuhan | 21 | 56 (50–65) | 17 | 4 | N | N | N | 21 | 17 | N | 5 |
| Chen L et al. | 2020 | 01/14–01/29 | Wuhan | 29 | 56 (26–79) | 21 | 8 | 2 | 8 | 5 | N | N | N | 6 |
| Chen NS et al. | 2020 | 01/01–01/20 | Wuhan | 99 | 55.5 ± 13.1 | 67 | 32 | N | N | N | 70 | 75 | N | 5 |
| Chen T et al. | 2020 | 01/13–02/12 | Wuhan | 274 | 62 (44–70) | 171 | 103 | 11 | 93 | 47 | N | N | N | 6 |
| Chen X et al. | 2020 | 01/23–02/14 | Non-Wuhan | 291 | (1–84) | 145 | 146 | 15 | 39 | 22 | N | 285 | 281 | 7 |
| Chen KB et al. | 2020 | 01/01–02/06 | Wuhan | 463 | 51 (43–60) | 244 | 219 | 22 | 107 | 40 | 406 | 220 | 63 | 7 |
| Deng Y et al. | 2020 | 01/01–02/21 | Wuhan | 225 | N | 124 | 101 | N | 58 | 26 | 185 | 191 | N | 6 |
| Fan LC et al. | 2020 | 01/20–03/15 | Non-Wuhan | 55 | 46.8 | 30 | 25 | N | 8 | 8 | 29 | 53 | N | 6 |
| Fan ZY et al. | 2020 | 01/20–01/31 | Non-Wuhan | 148 | 50 (36–64) | 73 | 75 | 9 | N | N | 50 | 39 | N | 6 |
| Fu L et al. | 2020 | N | Wuhan | 355 | N | 190 | 165 | 16 | 125 | 145 | N | N | N | 7 |
| Fang XW et al. | 2020 | 01/22–02/18 | Non-Wuhan | 79 | 45.1 ± 16.6 | 45 | 34 | 3 | 16 | 8 | 49 | 79 | 44 | 8 |
| Gao W et al. | 2020 | 01/01–02/28 | Non-Wuhan | 90 | 53 ± 16.9 | 43 | 47 | N | 21 | 9 | N | N | N | 6 |
| Gong J et al. | 2020 | 01/20–03/02 | Non-Wuhan | 189 | N | 88 | 101 | N | N | N | N | N | N | 6 |
| Guan W et al. | 2020 | 12/11–01/29 | Wuhan | 1099 | 47 (35–58) | 640 | 459 | 23 | 165 | 81 | 637 | 393 | N | 8 |
| Hu L et al. | 2020 | 01/08–02/10 | Wuhan | 323 | 61 (23–91) | 166 | 157 | 8 | 105 | 47 | 255 | 304 | N | 7 |
| Huang CL et al. | 2020 | 12/N-01/02 | Wuhan | 41 | 25-49 | 30 | 11 | 1 | 6 | 8 | 41 | 38 | N | 7 |
| Huang H et al. | 2020 | 01/20–02/29 | Non-Wuhan | 125 | 44.87 ± 18.55 | 63 | 62 | N | 20 | 8 | N | N | N | 8 |
| Jiang XF et al. | 2020 | 01/23–02/16 | Non-Wuhan | 55 | 45 (27–60) | 27 | 28 | 2 | 17 | 9 | 29 | 55 | N | 6 |
| Jin X et al. | 2020 | 01/17–02/08 | Non-Wuhan | 651 | 46.14 ± 14.19 | 74 | 577 | 25 | 100 | 48 | 277 | 546 | N | 7 |
| Li D et al. | 2020 | 01/20–02/27 | Non-Wuhan | 80 | 47.5 (3–90) | 40 | 40 | 3 | 14 | 10 | 56 | 80 | N | 7 |
| Li L et al. | 2020 | 01/21–02/29 | Non-Wuhan | 85 | 49 (36,64) | 47 | 38 | 6 | N | N | N | N | N | 6 |
| Liu C et al. | 2020 | 01/23–02/08 | Non-Wuhan | 32 | 38.5 (26.25–45.75) | 20 | 12 | 1 | 1 | N | N | N | N | 6 |
| Liu J et al. | 2020 | 01/5–01/24 | Wuhan | 40 | 48.7 ± 13.9 | 15 | 25 | N | 6 | 6 | N | N | N | 6 |
| Lu HZ et al. | 2020 | N-02/07 | Non-Wuhan | 265 | N | N | N | 1 | 52 | 21 | N | N | N | 5 |
| Luo XM et al. | 2020 | 01/30–02/25 | Wuhan | 403 | 56 (39–68) | 193 | 210 | N | 113 | 57 | 349 | 349 | N | 7 |
| Mo PZ et al. | 2020 | 01/01–01/25 | Wuhan | 155 | 54 (42–66) | 86 | 69 | 7 | 37 | 15 | N | 45 | N | 6 |
| Nie SK et al. | 2020 | 02/29–02/28 | Wuhan | 97 | 39 (30–60) | 34 | 63 | 3 | 15 | 5 | 47 | 86 | 33 | 7 |
| Qian GQ et al. | 2020 | 01/20–02/11 | Non-Wuhan | 91 | 50 (36.5–57) | 54 | 37 | N | 15 | 8 | N | N | N | 6 |
| Qian ZP et al. | 2020 | 01/20–02/24 | Non-Wuhan | 324 | 51 (31–64) | 167 | 157 | 20 | 67 | 23 | N | N | N | 7 |
| Qiu CF et al. | 2020 | 01/22–02/12 | Non-Wuhan | 104 | 43 ± 7.54 | 49 | 55 | N | 15 | 12 | 51 | 21 | 80 | 7 |
| Shi SH et al. | 2020 | 12/20–2020 | Wuhan | 81 | 49.5 ± 11.0 | 42 | 39 | 7 | 12 | 10 | N | N | N | 6 |
| Wang DW et al. | 2020 | 01/01–01/28 | Wuhan | 138 | 56 (42–68) | 75 | 63 | 4 | 43 | 14 | 89 | 124 | N | 8 |
| Wang SH et al. | 2020 | 01/10–01/14 | Wuhan | 333 | 62 (26–88) | N | N | N | N | N | N | N | N | 5 |
| Wen K et al. | 2020 | 01/20–02/08 | Non-Wuhan | 46 | 41.8 ± 16.3 | 27 | 19 | N | 7 | 3 | N | N | N | 6 |
| Wu J et al. | 2020 | 01/22–02/14 | Non-Wuhan | 80 | 46.1 ± 15.42 | 39 | 41 | 1 | N | N | 73 | 80 | 3 | 7 |
| Xiang TX et al. | 2020 | 01/21–01/27 | Non-Wuhan | 49 | 42.9 | 33 | 16 | 6 | 6 | 2 | N | N | N | 7 |
| Xie HS et al. | 2020 | 02/02–02/23 | Wuhan | 79 | 60.0 (48.0–66.0) | 44 | 35 | N | 14 | 8 | N | N | N | 6 |
| Xiong J et al. | 2020 | 01/17–02/20 | Wuhan | 89 | 53 ± 16.9 | 41 | 48 | N | 3 | 3 | 19 | 37 | N | 6 |
| Xu XW et al. | 2020 | 01/10–02/26 | Non-Wuhan | 62 | 41 (32–52) | 36 | 26 | 7 | 5 | 1 | 28 | 55 | N | 7 |
| Yan SJ et al. | 2020 | 01/22–03/13 | Non-Wuhan | 168 | 51 (36–62) | 81 | 87 | 6 | 24 | 12 | 119 | 155 | 30 8 | |
| Yang WJ et al. | 2020 | 01/17–02/10 | Non-Wuhan | 149 | 45.11 ± 13.35 | 81 | 68 | N | N | N | 34 | 140 | N | 6 |
| Yang XB et al. | 2020 | 12/N-01/26 | Wuhan | 52 | 59·7 (13 3) | 35 | 17 | N | N | 9 | 49 | 23 | N | 6 |
| Yao N et al. | 2020 | 01/21–02/21 | Non-Wuhan | 40 | 53.87 ± 15.84 | 25 | 15 | N | N | N | N | N | N | 5 |
| Yuan J et al. | 2020 | 01/24–02/23 | Non-Wuhan | 223 | 46.5 ± 16.1 | 106 | 117 | 8 | 25 | 18 | N | 223 | N | 7 |
| Zhang C et al. | 2020 | N | Non-Wuhan | 56 | N | N | N | N | N | N | N | N | N | 5 |
| Zhang GQ et al. | 2020 | 01/02–02/10 | Wuhan | 221 | 55 (20–96) | 108 | 113 | 7 | 54 | 22 | N | 196 | N | 7 |
| Zhang W et al. | 2020 | 01/21–02/11 | Non-Wuhan | 74 | 52.7 ± 19.1 | 35 | 39 | 1 | 5 | 1 | 14 | 21 | 72 | 8 |
| Zhang YF et al. | 2020 | 01/18–02/22 | Wuhan | 115 | 49.52 ± 17.06 | 49 | 66 | N | N | N | N | N | N | 6 |
| Zhao W et al. | 2020 | 01/21–02/8 | Non-Wuhan | 77 | 52 ± 20 | 34 | 43 | 8 | 16 | 6 | N | N | N | 7 |
| Zhao ZH et al. | 2020 | 01/21–02/16 | Non-Wuhan | 75 | 47 (34–55) | 42 | 33 | 4 | N | 6 | N | N | N | 7 |
| Zheng F et al. | 2020 | 01/17–02/07 | Non-Wuhan | 161 | 45 (33.5, 57) | 80 | 81 | 4 | 22 | 7 | N | N | N | 6 |
| Zhou F et al. | 2020 | 2019/12/29–2020/01/31 | Wuhan | 191 | 56 (46–67) | 119 | 72 | N | 58 | 36 | 181 | 41 | N | 7 |
| Zhou FT et al. | 2020 | 01/17–02/26 | Non-Wuhan | 197 | 55.94 ± 18.83 | 99 | 98 | 2 | N | 18 | 151 | 179 | 81 | 6 |
Antib = antibiotics, Antib = antivirals, D = diabetes, H = hypertension, L = liver-related diseases, N = no such data in the study, NOS = the Newcastle-Ottawa Quality Assessment Scale, Tcm = traditional Chinese medicine.