STI history by ethnicity adjusted for risk behaviours plus age, study region, education level (university degree) and relationship status, women
| Risk behaviour | CLS with non-regular partner, last 3 months | CLS with two or more partners, last 3 months | Two or more new partners in the last year |
| STI diagnosed in the last year | |||
| White British/other | 1.00 | 1.00 | 1.00 |
| Black/mixed African | 1.01 (0.67–1.53) | 1.02 (0.68–1.54) | 1.04 (0.68–1.59) |
| Black/mixed Caribbean | 1.58 (1.02–2.46) | 1.61 (1.03–2.49) | 1.61 (1.02–2.54) |
| Other ethnic group | 1.28 (0.70–2.31) | 1.31 (0.72–2.38) | 1.22 (0.66–2.27) |
| All | |||
| P value | 0.08 | 0.08 | 0.09 |
CLS, condomless sex.