Patient characteristics by geographical area and setting of enrolment
| Sample characteristic | GUM | GP | ||
| Bristol (N=21) | Brent (N=17) | Bristol (N=6) | Brent (N=5) | |
| Gender | ||||
| Male | 9 | 9 | 1 | 1 |
| Female | 12 | 8 | 5 | 4 |
| Age (years) | ||||
| Mean | 24 | 29 | 17 | 27 |
| Range | 16–35 | 21–41 | 16–20 | 22–43 |
| Ethnicity | ||||
| White British or European | 20 | 4 | 6 | 1 |
| Black African, Caribbean or British | 1 | 3 | 0 | 4 |
| Asian or SE Asian | 0 | 3 | 0 | 0 |
| Middle Eastern | 0 | 1 | 0 | 0 |
| Missing | – | 6 | – | – |
| Living situation | ||||
| Live alone | 4 | 1 | 0 | 4 |
| Live with spouse/partner | 4 | 5 | 0 | 0 |
| Live with family | 6 | 5 | 6 | 1 |
| Live with friends | 5 | 2 | 0 | 0 |
| Missing | 2 | 4 | – | – |