HRs and 95% CIs of progressing to AIDS among HIV infectors, Cox proportional hazard model results according to demographic factors and selected variables at HIV diagnosis, Wuhan, China.

Data reported to Centers for Disease Control and Prevention from 1994 to February 29, 2012.
*Relative risk adjusted for sex and the other factors statistically significant in univariate analysis.
**The youngest person who met the inclusion criteria was 17 years old.
***≤Primary: illiterate or primary school, Secondary: middle school, high school or technical secondary school.
****Unknown exclude.
MSM = men who had sex with men; IDU = injection drug user; HC = heterosexual contact with a high-risk individual or person with HIV infection or AIDS; Blood = blood transfusion or blood products; AIDS = acquired immunodeficiency syndrome; HIV = human immunodeficiency virus; HR = hazard ratio; CI = confidence interval.