A Comprehensive Study on Survival Trend in Iranian Patients with HIV Infection and Variations According to Age and Mode of Transmission : A 14-year follow-up study.

One of the epidemiological descriptor of a fatal infectious disease is the time it takes from infection to death or the survival period. The present study has focused on trend in survival and death of Iranian nonhemophiliac HIV patients from 1988 to 2002 and has estimated the nonparametric distribution of the survival function of HIV patients with respect to different variables of interest, like mode of transmission, gender and age at the time of diagnosis.

Nonparametric estimation of survival function of HIV+ patients with doubly censored data.

In the analysis of follow-up studies of patients who have been or may be infected by the Type-1 human immunodeficiency virus (HIV-1), which causes the acquired immune deficiency syndrome (AIDS), one problem of interest is the estimation of distribution of the survival function when the origin and end points defining the survival time suffer interval censoring. In this paper, we have compared Kaplan-Meier, midpoint estimation and sun (1997), by analysis of a cohort study data of Iranian Injecting Drug Users (IDU) who became HIV infected through the using common infected syringe.