Associated factors to HIV coinfection in 15–24-year-old patients diagnosed of gonorrhoea, syphilis or venereal lymphogranuloma in Barcelona (N=830)
| Variables | ORa* | 95% CI |
| Age | ||
| Each more 1 year | 1.13 | 0.96 to 1.28 |
| Education | ||
| Secondary or university | 1.00 | |
| Primary or less | 1.03 | 0.47 to 2.26 |
| Missing | 0.95 | 0.49 to 1.84 |
| Country of birth | ||
| Spain | 1.00 | |
| Not Spain | 1.37 | 0.79 to 2.38 |
| Missing | 1.01 | 0.35 to 2.90 |
| Sexual behaviour | ||
| MSW | 1.00 | |
| MSM | 14.14 | 3.34 to 59.91 |
| Missing (men) | 4.91 | 0.96 to 25.13 |
| Women | 1.40 | 0.19 to 10.12 |
| STI diagnoses in the previous 12 months | ||
| No | 1.00 | |
| Yes | 2.06 | 1.13 to 3.77 |
| Number of sexual partners in the previous 12 months | ||
| One to three | 1.00 | |
| Four to six | 1.33 | 0.34 to 5.16 |
| Seven to ten | 0.89 | 0.21 to 3.84 |
| >10 | 4.11 | 1.53 to 11.01 |
| Missing | 2.33 | 0.89 to 6.10 |
*This model was adjusted for all the listed variables in the table: Age, education, country of birth, sexual behaviour, previous 12 months STI diagnoses and number of sexual partners (last 12 months).
MSM, men who have sex with men; MSW, men who have sex with women only; ORa, adjusted odds ratio ; STI, sexually transmitted infection.