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Published on: July 24, 2013
Factors associated with specific causes of death amongst HIV-positive individuals in the D:A:D Study
1, Colette Smith, Caroline A Sabin
1Research Department of Infection and Population Health, UCL, Royal Free Campus, London, UK. c.smith@ucl.ac.uk
Insights
Mortality in HIV-positive individuals has decreased, but factors like smoking, co-infections, and lower CD4 counts still increase death risk. Addressing these modifiable risks is key to reducing deaths in the cART era.
Area of Science:
- Infectious Diseases
- Epidemiology
- Public Health
Background:
- The advent of combination antiretroviral therapy (cART) has transformed HIV management, leading to decreased mortality.
- However, understanding evolving causes of death and associated risk factors in HIV-positive individuals remains crucial.
Purpose of the Study:
- To identify emerging trends in causes of death among HIV-positive individuals during the cART era.
- To investigate specific risk factors associated with each cause of death.
Main Methods:
- An observational multicentre cohort study was conducted using data from the Data Collection on Adverse Events of Anti-HIV drugs (D:A:D) Study.
- Multivariable Poisson regression was employed to analyze associations between HIV-specific and non-HIV-specific risk factors and mortality.
Main Results:
- A total of 2482 deaths were observed. Primary causes included AIDS, liver-related, cardiovascular disease (CVD)-related, and non-AIDS malignancy.
- Mortality rates declined significantly from 1999/2000 to 2007/2008.
- Risk factors identified include smoking (CVD, non-AIDS cancers), HBV/HCV co-infection (liver-related), hypertension (liver-related, CVD), diabetes, higher HIV RNA, and lower CD4 counts.
Conclusions:
- Multiple potentially modifiable risk factors, both traditional and HIV-specific, contribute to mortality in HIV-infected individuals.
- Addressing these factors is essential for further reducing mortality.
- No emerging trends in unexpected causes of death were observed, though continued monitoring is recommended.
Objective:
To investigate any emerging trends in causes of death amongst HIV-positive individuals in the current cART era, and to investigate the factors associated with each specific cause of death.
Design:
An observational multicentre cohort study.
Methods:
All HIV-positive individuals included in one of the cohorts in the Data Collection on Adverse Events of Anti-HIV drugs (D:A:D) Study were included. The association between HIV-specific and non HIV-specific risk factors and death were studied using multivariable Poisson regression.
Results:
We observed 2482 deaths in 180,176 person-years (PY) on 33,308 individuals [rate/1000 PY = 13.8 (95% CI 13.2-14.3)]. Primary causes of death were: AIDS (n = 743; rate/1000 PY = 4.12), liver-related (341; 1.89), CVD-related (289; 1.60), non-AIDS malignancy (286; 1.59). The overall rate of death fell from 16.9 in 1999/2000 to 9.6/ 1000 PY in 2007/2008. Smoking was associated with CVD and non-AIDS cancers, HBV and HCV co-infection with liver-related deaths, and hypertension with liver-related and CVD deaths. Diabetes was a risk factor for all specific causes of death except non-AIDS cancers, and higher current HIV RNA for AIDS-related deaths. Lower CD4 cell counts were associated with a higher risk of death from all specific causes of death.
Conclusion:
Multiple potentially modifiable traditional and HIV-specific risk factors for death of HIV-infected persons were identified. The maximum reduction in mortality in HIV-infected populations will require that each of these factors be appropriately addressed. No trends in terms of emerging causes of unexpected deaths were observed, although monitoring will continue.
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