The AIDS epidemic in Lyon: patient characteristics and defining illnesses between 1985 and 2000.
OBJECTIVE
To define the characteristics of 1899 patients diagnosed with AIDS at Lyon University Hospitals (LUH) across four time periods corresponding to different antiretroviral eras, and to analyse the evolution of specific AIDS-defining illnesses (ADIs) with time.


METHODS
All AIDS patients at LUH between 1 January 1985 and 31 December 2000 were included in the study. The data were compared using the chi(2) test and one-way analysis of variance.


RESULTS
The absolute number of new AIDS cases increased by 30.3% between 1985 and 1995 but decreased by 26.5% between 1996 and 2000. The proportion of women with AIDS increased significantly (P<0.001) and mean age at diagnosis also increased significantly over time (P<0.001). The proportion of infection through heterosexual contact increased dramatically, while that through homo/bisexual intercourse or injection drug use (IDU) decreased significantly (P<0.001). The absolute number of ADIs declined with the introduction of highly active antiretroviral therapies (HAART) (P<10(-6)). Pneumocystis carinii pneumonia remained the leading ADI in 1996-2000 (23.3%). A significant increase in the proportion of non-Hodgkin's lymphoma (NHL) was observed over time (P<10(-5)) but the number of new NHL cases decreased during HIV infection after 1996.


CONCLUSIONS
The decline in the incidence of AIDS with the advent of HAART was confirmed in our hospital cohort. The gradual increase in the proportion of NHL among ADIs underscores the long latency period between infection with HIV and the achievement of an effect of HAART on HIV-associated lymphomagenesis.
Gayet-Ageron
A
A
Department of Hospital Epidemiology, Edouard Herriot Hospital, Lyon, France.
Baratin
D
D
Marceillac
E
E
Allard
R
R
Peyramond
D
D
Chidiac
C
C
Trepo
C
C
Livrozet
J-M
JM
Touraine
J-L
JL
Ritter
J
J
Sepetjan
M
M
Fabry
J
J
Vanhems
P
P
D000163:Acquired Immunodeficiency Syndrome / Q000453:epidemiology* / Q000635:transmission; D000328:Adult; D000704:Analysis of Variance; D016009:Chi-Square Distribution; D015331:Cohort Studies; D004196:Disease Outbreaks / Q000706:statistics & numerical data*; D005260:Female; D005602:France / Q000453:epidemiology; D006801:Humans; D015994:Incidence; D008297:Male; D012309:Risk-Taking; D017678:Sex Distribution; D012725:Sexual Behavior; D015819:Substance Abuse, Intravenous / Q000150:complications / Q000453:epidemiology