Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Characteristics of included studies
| Study | Sample size | Design | Severe patients |
Non-severe patients |
||
|---|---|---|---|---|---|---|
| n (%) | Age (years) | n (%) | Age (years) | |||
| Hong KS et al.2 2020 | 98 | Retrospective cohort | 13 (13.2%) | 63.2 ± 10.1 | 85 (86.8%) | 54.2 ± 17.7 |
| Jang JG et al.3 2020 | 110 | Retrospective cohort | 23 (25%) | 68.0 ± 11.9 | 87 (75%) | 53.9 ± 17.0 |
| Ji W et al.4 2020 | 7341 | Case control | 954 (13%) | 59.6 ± 56.2 | 6387 (87%) | 54.0 ± 60.7 |
