Gender difference in 2-year mortality and immunological response to ART in an HIV-infected Chinese population, 2006-2008.

BACKGROUND: Since it was initiated in 2002, the China Free Antiretroviral Treatment (ART) Program has been progressing from an emergency response to a standardized treatment and care system. As of December 31, 2009, a total of 81,880 patients in 31 provinces, autonomous regions, and special municipalities received free ART. Gender differences, however, in mortality and immunological response to ART in this cohort have never been described. OBJECTIVE: To understand whether women and men who enrolled in the China National Free ART Program responded equally well to the treatment. METHODS: A retrospective analysis of the national free ART databases from June 2006-December 2008 was performed. HIV-infected subjects who were 18 years or older, ART naïve at baseline, and on a 3TC regimen enrolled in the program from June 1 to December 31, 2006, were included in this study, then followed up to 2 years. RESULTS: Among 3457 enrolled subjects who met the inclusion criteria, 59.2% were male and 40.8% female. The majority of the subjects were 19-44 years old (77%) and married (72%). Over the full 24 months of follow-up, the mortality rate was 19.0% in males and 11.4% in females (p = 0.0014). Males on therapy for 3-24 months were more likely to die than females (HR = 1.46, 95% CI: 1.04-2.06, p = 0.0307) after adjusting for baseline characteristics. Compared to men, women had higher CD4+ counts over time after initiating ART (p<0.0001). CONCLUSIONS: Our study showed that women had an overall lower mortality and higher CD4+ counts than men in response to ART treatment, which may be attributed to adherence, biological factors, social, cultural and economic reasons. Further study is needed to explore these factors that might contribute to the gender differences in mortality and immunological response to ART.

Changing baseline characteristics among patients in the China National Free Antiretroviral Treatment Program, 2002-09.

OBJECTIVE: To improve HIV treatment in China by determining changes over time of patient characteristics (geographic, clinical and route of HIV infection) among patients enrolled in the China National Free Antiretroviral Treatment Program. METHODS: Patients in the national treatment database from 1 June 2002 to 1 June 2009 were eligible. Patients were excluded if <18 years old, not previously treatment-naïve, missing initial treatment date or not initiated on triple drug therapy. RESULTS: About 62 919 patients were included, located across 54.8% of counties/districts throughout mainland China; 86.4% were concentrated in 11.1% of counties/districts. Median age was 38 years, 41% female, 45.4% former plasma donors (FPDs), 33.9% sexually infected and 15.5% injection drug users (IDUs). Median baseline CD4 cell count was 129/µl. In 2002, 100% of treated were FPDs with no CD4 cell counts. By 2009, 59% of the treated were sexually infected and 96% had baseline CD4 cell counts. Injection drug users remained a minority of those treated. CONCLUSIONS: Limited treatment resources can be focused on areas with more patients. Greater emphasis needs to be placed on earlier HIV diagnosis and treatment. New strategies must be identified to bring HIV-infected IDUs into treatment. Routine HIV testing would identify those at risk earlier.

Prevalence and predictors of HIV infection among female sex workers in Kaiyuan City, Yunnan Province, China.

BACKGROUND: Sexual transmission is the fastest growing route of HIV transmission in China. We undertook this study to describe the risk factors for HIV infection in female sex workers (FSWs), and to determine the commercial sex venues where FSWs are most at risk of being infected with or infecting others with HIV. METHODS: This was a cross-sectional study of 737 FSWs in Kaiyuan City, Yunnan Province in southern China, which took place from March to May 2006. RESULTS: The overall HIV prevalence was 10.3%, but prevalence varied with sex venue with 25.8% of FSWs working on the streets being HIV-positive and none of the FSWs working in nightclubs. Adjusted odds ratios (OR) of HIV infection were 9.1 (95% confidence interval (CI) 4.67-17.55) for injection drug use, 3.3 (95% CI 1.46-7.37) for non-injection illegal drug use, 2.7 (95% CI 1.25-5.93) for duration of sex work > or = 5 years, 2.2 (95% CI 1.05-4.70) for infection with herpes simplex virus type 2, and 2.0 (95% CI 1.12-3.47) for working at a higher risk entertainment venue. Although condom use was not a significant risk factor in the overall model, FSWs in lower risk venues who reported consistent use with clients had a 70% reduction in HIV infections (OR 0.30, 95% CI 0.12-0.90). CONCLUSIONS: Illegal drug use, particularly with injection drugs, is the single greatest risk factor for HIV infection among FSWs in Kaiyuan City, China. FSWs working on the street or in temporary sub-lets, beauty salons, or saunas are at particularly high risk for transmitting and being infected with HIV. HIV prevention efforts among FSWs should target illegal drug users and these other subgroups.

The effect of highly active antiretroviral therapy on mortality among HIV-infected former plasma donors in China.

BACKGROUND: In China, many former plasma donors were infected with the human immunodeficiency virus (HIV) in the early-mid-1990s. Highly active antiretroviral therapy (HAART) was provided for former plasma donors beginning in 2002. The effect of HAART on mortality in this cohort has not been described. METHODS: This study is a retrospective analysis of the national HIV epidemiology and treatment databases for the period 1993-2006. All HIV-infected subjects from 10 counties with a high prevalence of HIV infection in 6 provinces were eligible. Inclusion criteria were: (1) history of plasma donation, (2) positive Western blot result, (3) clinical diagnosis of AIDS or CD4(+) cell count <200 cells/microL at any time, and (4) age >or=18 years at AIDS diagnosis. RESULTS: Of 9059 eligible subjects, 4093 met the inclusion criteria. Mean age was 41 years, 51% were male, 99% were farmers, and 87% were from Henan Province. Overall mortality decreased from 27.3 deaths per 100 person-years in 2001 to 4.6 deaths per 100 person-years in 2006. Conversely, the percentage of patient-years receiving HAART increased from 0% in 2001 to 70.5% in 2006. In a multivariate Cox proportional hazards analysis, not receiving HAART was the greatest risk factor for mortality (hazard ratio, 2.8; 95% confidence interval, 2.4-3.3). Among treated patients, those who had lower CD4(+) cell counts and higher numbers of opportunistic infections at the initiation of therapy were at greater risk of death. CONCLUSIONS: The national treatment program has significantly reduced the mortality rate among HIV-infected former plasma donors through the use of generic drugs in a rural treatment setting with limited laboratory monitoring. Treatment success can be improved through increased coverage and earlier initiation of therapy.