Risk of AIDS and/or death according to definition of severe primary HIV infection (PHI).

a- bronchitis, pneumonia, oral candidiasis, thrombocytopenia, viral meningitis, bacterial meningitis, encephalitis, neuropathy, Candida pharyngitis. b- viral meningitis, bacterial meningitis, encephalitis, neuropathy. *Adjusted for sex, risk group (sex between men, injecting drug use, sex between men and women, other/unknown), age at HIV seroconversion (≤30 and >30 years) and first CD4 count (<350, 351–500 and >500 cells/mm3). ¤Adjusted for sex, risk group (sex between men, injecting drug use, sex between men and women, other/unknown), age at HIV seroconversion (≤30 and >30 years). ¥Long rank test for difference in survivor probabilities. §Cox semiparametric survival model. †Heterogeneity test for categorical variables. ‡The symbol “-” for median survival time indicates that fewer than 50% of patients at risk have experienced the event by the end of follow-up. ◊Analyses only included patients with at least 2 CD4 counts measured in the first 6 months of HIV diagnosis.