Comparison of the characteristics of patients included into clustered transmission versus non-clustered: the ANRS PRIMO cohort 1999–2010.

Note: the total of patients for each variable does not always equal the total sample due to some missing values. PHI = primary HIV infection; MSM = men having sex with men; TPHA = Treponema palladium haemagglutination assay; VDRL = Venereal Diseases Research Laboratory test.(1)Urethritis, rectitis, genital herpes infection, vulvo-vaginal candidosis, condyloma and/or syphilis.(2)In the last 6 months preceding PHI diagnosis.