Recent trends in hospital utilization and mortality for HIV infection: 2000-2005

Decreased ratio of influenza-specific IgG versus IgM in response to influenza vaccination in antiretroviral-treated HIV-infected African Americans compared to Caucasians, and its direct correlation with the percentages of peripheral Tfh cells

BACKGROUND

Racial differences have been observed in the rate of bacterial infection and disease progression in HIV. Here, we evaluate racial differences in seasonal influenza vaccine responses.

METHODS

16 healthy controls (9 Caucasians (CC) and 7 African Americans (AA)) and 26 antiretroviral therapy (ART)-treated aviremic HIV+ subjects (11 CC and 15 AA) were enrolled in the current study. Blood was collected at pre-vaccination (D0) and day 14 (D14) following seasonal influenza vaccination. Serologic responses were characterized in plasma by ELISA. B and T cells were assessed by flow cytometry ex vivo.

RESULTS

The absolute counts of CD4+ CD3+ T cells and CD19+ B cells were similar in healthy controls and HIV-infected individuals, and similar in CC and AA in the two study groups. However, the percentage of peripheral T follicular helper (pTfh) cells was decreased in HIV+ AA compared to HIV+ CC. There were no racial differences in IgG antibody responses against vaccination in the two study groups. However, the ratio of anti-influenza-specific IgG versus IgM induction following vaccination was decreased in HIV+ AA compared to HIV+ CC, which was directly correlated with the percentages of pTfh cells. This racial difference and correlation were not demonstrable in healthy controls.

CONCLUSION

Here we report that HIV + AA has decreased fold induction of IgG versus IgM after influenza vaccination, which may suggest impaired class-switching from IgM to IgG in AA HIV-infected individuals.

Trends in hospital deaths among human immunodeficiency virus-infected patients during the antiretroviral therapy era, 1995 to 2011

OBJECTIVE

Mortality in hospitalized human immunodeficiency virus (HIV)-infected patients is not well described. We sought to characterize in-hospital deaths among HIV-infected patients in the antiretroviral (ART) era and identify factors associated with mortality.

METHODS

We reviewed the medical records of hospitalized HIV-infected patients who died from January 1, 1995 to December 31, 2011 at an urban teaching hospital. We evaluated trends in early and late ART use and deaths due to acquired immunodeficiency syndrome (AIDS) and non-AIDS, and identified clinical and demographic correlates of non-AIDS deaths.

RESULTS

In-hospital deaths declined significantly from 1995 to 2011 (P < 0.0001); those attributable to non-AIDS increased (43% to 70.5%, P < 0.0001). Non-AIDS deaths were most commonly caused by non-AIDS infection (20.3%), cardiovascular (11.3%) and liver disease (8.5%), and non-AIDS malignancy (7.8%). Patients with non-AIDS compared to AIDS-related deaths were older (median age 48 vs 40 years, P < 0.0001), more likely to be on ART (74.1% vs 55.8%, P = 0.0001), less likely to have a CD4 count of <200 cells/mm(3) (47.2% vs 97.1%, P < 0.0001), and more likely to have an HIV viral load of ≤400 copies/mL (38.1% vs 4.1%, P < 0.0001). Non-AIDS deaths were associated with 4.5 and 4.2 times greater likelihood of comorbid underlying liver and cardiovascular disease, respectively.

CONCLUSIONS

Non-AIDS deaths increased significantly during the ART era and are now the most common cause of in-hospital deaths; non-AIDS infection, cardiovascular and liver disease, and malignancies were major contributors to mortality. Higher CD4 cell count, liver, and cardiovascular comorbidities were most strongly associated with non-AIDS deaths. Interventions targeting non-AIDS-associated conditions are needed to reduce inpatient mortality among HIV-infected patients.

Factors Associated With Hospitalizations Among HIV-Infected Adults in the United States: Review of the Literature

Although improving health outcomes in human immunodeficiency virus (HIV)-infected persons has been identified as a national priority, little is known about the factors associated with hospitalizations of HIV-infected persons in the highly active antiretroviral therapy (HAART) era. Since the introduction of HAART in 1996, there has been a dramatic increase in the life expectancy of HIV-infected persons. However, aging and the long term use of HIV medications have led to an increased incidence of chronic, non-HIV-related illnesses. To improve patient outcomes, the factors that contribute to co-morbidities in HIV-infected persons need to be identified. As a first step, we will summarize the current literature on causes and contributing factors of hospitalizations in adults infected with HIV in the HAART era.

Increased costs of HIV care associated with aging in an HIV-infected population

OBJECTIVES

Improved survival has shifted the HIV epidemic in the developed world towards more individuals >50 years of age. Older individuals, with new or longstanding HIV infection, are at greater risk for HIV-related and non-HIV-related conditions, compounding the burden and complexity of HIV management. The aim of the study was to examine the impact of age on the cost of HIV care in a well-defined HIV-infected population.

METHODS

All HIV-infected individuals >16 years old receiving HIV care between 1 January 2000 and 1 January 2011 were included in the study. The costs of antiretroviral therapy (ART), HIV-related out-patient care and HIV-related in-patient care were collected using mean cost per person, per month (PPPM) as the comparator variable for the comparison between older (>50 years old) and younger (≤ 50 years old) patients.

RESULTS

The proportion of older patients increased from 9.6% to 25.4% and proportional costs increased from 25% to 31% from 1999 to 2010. Older patients were more likely than younger patients to be on ART (89% vs. 69%, respectively; P<0.01) and to have AIDS (29% vs. 20%, respectively; P<0.05) but had similar median CD4 counts (404 vs. 396 cells/μL, respectively; not significant). They incurred higher costs for all aspects of HIV care throughout the entire 12 years. By 2010, the mean PPPM cost of HIV care for longstanding older patients was $1325 compared with $1075 for younger patients. More expensive ART as a consequence of more complex regimens, more comorbid interactions and greater adherence accounted for most of the cost difference.

CONCLUSIONS

The aging of the HIV-infected population in care is leading to increased HIV care costs. Health care planners and funding agencies need to be aware of the impact of this important shift in HIV demographics on the overall costs of HIV care.

Ethnic-Racial Stigma and Health Disparities: From Psychological Theory and Evidence to Public Policy Solutions

The presence of diverse ethnic-racial groups in the United States today is a source of national pride. However, this cultural sentiment is overshadowed by the reality that those ethnic-racial groups that are stigmatized carry a disproportionate burden of negative physical health outcomes. These systematic differences are referred to as health disparities. Although this phenomenon is fairly well documented, relatively little is understood about the social contexts and the psychological processes they activate that contribute to poor health. More importantly, to demonstrate the processes underlying health disparities does not single-handedly address the issue of social injustice in the health of disadvantaged people. Scientists must assume the burden of facilitating the translation of their laboratory and community-based research to public policy recommendations. This volume of the Journal of Social Issues brings together social, developmental, cognitive, and clinical psychological research on the physical health of ethnic-racial stigmatized individuals in the United States. Each contribution explicitly discusses the implications of research for public health policy.