Table 1.
Descriptive characteristics of the studies included.
| References | City/region | Period of observation | COVID diagnosis | Stage of COVID | Sample size | Number of males | Mean/median age (SD or range) |
|---|---|---|---|---|---|---|---|
| Liu et al. (17) | Nine tertiary hospitals in Hubei province | December 30, 2019– January 24, 2020 |
RT-PCR on Throat swab samples | Pneumonia | 137 | 61 | 55 (16) |
| Wang et al. (15) | Zhongnan Hospital of Wuhan University | January 1– January 28, 2020 |
RT-PCR on Throat swab samples | Pneumonia | 138 | 75 | 56 (42–68) |
| Wu et al. (16) | Wuhan Jinyintan Hospital | December 25, 2019– January 26, 2020 |
RT-PCR on Throat swab samples | Pneumonia | 201 | 128 | 51 (43–60) |
| Ling et al. (14) | Shanghai Public Health Clinical Center | January 20, 2020– February 10, 2020 |
RT-PCR on Throat swab samples | Convalescent | 66 | 38 | 44 (34–62) |
COVID, coronavirus disease 2019; RT-PCR, Reverse transcriptase-polymerase chain reaction.