Table 3.
Patient characteristics in included studies.
| Study | Sample size | Age (mean or median) | Age (range) | Sex (male or female) |
|---|---|---|---|---|
| Swachuk, 198912 | 8 | Not available | Not available | Not available |
| Ferenczy, 199014 | 110 | Not available | Not available | Not available |
| Ferenczy, 199013, 14, 15, 16, 17, 18, 19, 20, 21 | 43 | Not available | Not available | Not available |
| Sood, 199416 | 49 | Not available | Not available | Female |
| Gloster, 199517 | Not available | Not available | Not available | Not available |
| Weyandt, 201118 | 18 | Not available | Not available | Not available |
| Kwak, 201619 | 11 | 55 | 38 to 74 | Male: 8, Female: 3 |
| Neumann, 201820 | 24 | 41 | 29 to 65 | Female |
| Zhou, 201921 | 134 | 43 | 24 to 70 | Female |