Epidemiological characterization of individuals with newly reported HIV infection: South Carolina, 2004-2005

Baseline CD4 cell counts of newly diagnosed HIV cases in China: 2006-2012

BACKGROUND

Late diagnosis of HIV infection is common. We aim to assess the proportion of newly diagnosed HIV cases receiving timely baseline CD4 count testing and the associated factors in China.

METHODS

Data were extracted from the Chinese HIV/AIDS Comprehensive Response Information Management System. Adult patients over 15 years old who had been newly diagnosed with HIV infection in China between 2006 and 2012 were identified. The study cohort comprised individuals who had a measured baseline CD4 count.

RESULTS

Among 388,496 newly identified HIV cases, the median baseline CD4 count was 294 cells/µl (IQR: 130-454), and over half (N = 130,442, 58.8%) were less than 350 cells/µl. The median baseline CD4 count increased from 221 (IQR: 63-410) in 2006 to 314 (IQR: 159-460) in 2012. A slight majority of patients (N = 221,980, 57.1%) received baseline CD4 count testing within 6 months of diagnosis. The proportion of individuals who received timely baseline CD4 count testing increased significantly from 20.0% in 2006 to 76.9% in 2012. Factors associated with failing to receiving timely CD4 count testing were: being male (OR: 1.17, 95% CI: 1.15-1.19), age 55 years or older (OR:1.03, 95% CI: 1.00-1.06), educational attainment of primary school education or below (OR: 1.30, 95% CI: 1.28-1.32), infection with HIV through injection drug use (OR: 2.07, 95% CI: 2.02-2.12) or sexual contact and injection drug use (OR: 1.87, 95% CI: 1.76-1.99), diagnosis in a hospital (OR: 1.91, 95% CI: 1.88-1.95) or in a detention center (OR: 1.75, 95% CI: 1.70-1.80), and employment as a migrant worker (OR:1.55, 95% CI:1.53-1.58).

CONCLUSION

The proportion of newly identified HIV patients receiving timely baseline CD4 testing has increased significantly in China from 2006-2012. Continued effort is needed for further promotion of early HIV diagnosis and timely baseline CD4 cell count testing.

Pediatric primary care provider practices, knowledge, and attitudes of human immunodeficiency virus screening among adolescents

OBJECTIVES

To evaluate pediatric primary care provider (PCP) HIV screening practices, knowledge, and attitudes.

STUDY DESIGN

Anonymous cross-sectional, internet-based survey of pediatric PCPs from 29 primary care practices. Survey items assessed current HIV screening practices and knowledge, attitudes, and perceived barriers towards screening. Provider demographics and practice characteristics were analyzed for associations with screening through logistic regression.

RESULTS

Of 190 PCPs, there were 101 evaluable responses (response rate: 53.2%). PCPs reported a screening rate for HIV of 39.6% ("most" or "all of the time") during routine adolescent visits compared with violence (60.4%), substance abuse (92.1%), and depression (94.1%) (P < .001). Less than 10% of PCPs correctly answered questions related to Centers for Disease Control and Prevention and state HIV screening recommendations. Of 20 potential HIV screening barriers assessed, mean number of reported barriers was 4.8 (SD ± 2.9); with most concerns related to confidentiality, time for counseling, and follow-up. In a multivariable model, the only factor significantly associated with HIV screening "most" or "all of the time" during routine adolescent visits was urban practice site (aOR 9.8, 95% CI 2.9, 32.9). Provider type, sex, years since training, HIV screening guideline knowledge, and endorsing ≤5 barriers were not associated with HIV screening.

CONCLUSIONS

Although providers practicing in urban areas were more likely to report screening adolescents for HIV than those in suburban areas, overall self-reported screening rates were low, and several barriers were identified commonly. Future interventions should target increasing providers' knowledge and addressing concerns about confidentiality, requirements and counseling time, and follow-up of results.

Time to linkage to care and viro-immunologic parameters of individuals diagnosed before and after the 2006 HIV testing recommendations

OBJECTIVES

To assess the time from linkage to care and viro-immunologic parameters before and after implementation of the Centers for Disease Control and Prevention's 2006 revised human immunodeficiency virus (HIV) testing strategy.

METHODS

Case reports from South Carolina's enhanced HIV/AIDS (acquired immunodeficiency syndrome) Reporting System were used to compare time to linkage to care and viro-immunologic indicators at diagnosis and 1 year after diagnosis of HIV in individuals diagnosed between 2004 and 2006 (n = 2456) with those diagnosed between 2008 and 2010 (n = 2118). CD4 T-cell count/percent and viral load tests were used as a proxy for a clinical visit and to determine disease stage.

RESULTS

Individuals diagnosed between 2008 and 2010 were less likely than those diagnosed between 2004 and 2006 to be in care after 12 months than within 3 months of HIV diagnosis (adjusted odds ratio [AOR] 0.42, 95% confidence interval [CI] 0.34-0.51). Individuals diagnosed between 2008 and 2010 were more likely than those diagnosed between 2004 and 2006 to have high CD4 T-cell counts (>500 cells per cubic millimeter than ≤200 cells per cubic millimeter; AOR 1.24, 95% CI 1.01-1.51) and have undetectable viral loads 1 year post-HIV diagnosis (AOR 8.42, 95% CI 6.96-10.18). Although period of diagnosis did not predict disease stage 1 year post-HIV diagnosis (AOR 0.99, 95% CI 0.87-1.13), there was a decrease from 13% between 2004 and 2006 to 10% between 2008 and 2010 in the percentage of HIV-only patients at diagnosis who progressed to AIDS 1 year post-HIV diagnosis.

CONCLUSIONS

Implementation of routine, opt-out HIV testing resulted in more timely linkage to care and improved viro-immunologic parameters 1 year postdiagnosis when compared with the previous testing recommendations.

Understanding barriers to routine HIV screening: knowledge, attitudes, and practices of healthcare providers in King County, Washington

OBJECTIVE

In 2006, the Centers for Disease Control and Prevention (CDC) recommended routine HIV screening in healthcare settings for persons between 13 and 64 years old. In 2010, the Washington Administrative Code (WAC) was changed to align testing rules with these recommendations. We designed this survey to ascertain the current state of HIV testing and barriers to routine screening in King County, Washington.

METHODS

Between March 23 and April 16, 2010, a convenience sample of healthcare providers completed an online survey. Providers answered true-false and multiple choice questions about national recommendations and the WAC, policies in their primary clinical settings, and their personal HIV testing practices. Providers were asked to agree or disagree whether commonly reported barriers limited their implementation of routine HIV screening.

RESULTS

Although 76% of the 221 respondents knew that the CDC recommended routine HIV screening for persons regardless of their risk, 99 (45%) providers reported that their primary clinical setting had a policy to target testing based on patient risk factors. Forty-four (20%) providers reported that their primary clinical setting had a policy of routine HIV screening, 54 (25%) reported no official policy, and 15 (7%) did not know whether a policy existed. Only 11 (5%) providers offer HIV testing to all patients at initial visits. When asked about barriers to routine screening, 57% of providers agreed that perception that their patient population is low risk limits the number of HIV tests they perform. Only 26 (13%) providers agreed that concern about reimbursement posed a barrier to testing.

CONCLUSIONS

Most providers participating in this survey continue to target HIV testing, despite knowledge of national recommendations. Efforts are still needed to educate providers and policymakers, clarify the recent WAC revisions, and implement structural changes in order to increase HIV testing in Washington State.

CD4 Cell Counts at HIV Diagnosis among HIV Outpatient Study Participants, 2000-2009

Background. It is unclear if CD4 cell counts at HIV diagnosis have improved over a 10-year period of expanded HIV testing in the USA. Methods. We studied HOPS participants diagnosed with HIV infection ≤6 months prior to entry into care during 2000–2009. We assessed the correlates of CD4 count <200 cells/mm³ at HIV diagnosis (late HIV diagnosis) by logistic regression. Results. Of 1,203 eligible patients, 936 (78%) had a CD4 count within 3 months after HIV diagnosis. Median CD4 count at HIV diagnosis was 299 cells/mm³ and did not significantly improve over time (P = 0.13). Comparing periods 2000-2001 versus 2008-2009, respectively, 39% and 35% of patients had a late HIV diagnosis (P = 0.34). Independent correlates of late HIV diagnosis were having an HIV risk other than being MSM, age ≥35 years at diagnosis, and being of nonwhite race/ethnicity. Conclusions. There is need for routine universal HIV testing to reduce the frequency of late HIV diagnosis and increase opportunity for patient- and potentially population-level benefits associated with early antiretroviral treatment.

Predictors of time to enter medical care after a new HIV diagnosis: a statewide population-based study

Public health benefits of expanded HIV screening will be adequately realized only if an early diagnosis is followed by prompt linkage to care. We characterized rates and factors associated with failure to enter into medical care within three months of HIV diagnosis and assessed the predictors of time to enter care over a follow-up period of up to 60 months. The study cohort included 3697 South Carolina (SC) residents' ≥13 years who were newly HIV-diagnosed in 2004-2008. Date of first laboratory report of CD4(+) T-cell count or viral load (VL) test after 30 days of confirmatory HIV diagnosis was used to define time to linkage to care. Results showed that of the total 3697 persons, 1768 (48%) entered care within three months, 1115 (30%) in four-12 months after diagnosis, and 814 (22%) failed to initiate care within 12 months of HIV diagnosis. At the end of study follow-up period of up to 60 months from the date of HIV diagnosis, 472/3697 (13%) individuals remained out of care. Multivariable Cox proportional hazards analysis showed that compared with hospitals, time to enter care was shorter in those diagnosed at state mental health/correctional facilities (adjusted hazards ratio [aHR] 1.16; 95% confidence interval [CI] 1.02-1.34) and longer in those diagnosed at county health departments (aHR 0.87; 95% CI 0.80-0.96) and at "Other/unknown" facilities (aHR 0.79; 95% CI 0.70-0.89). Time to entry into care was longer for men (aHR 0.82; 95% CI 0.75-0.89) compared with women, blacks (aHR 0.91; 95% CI 0.83-0.98) compared with whites, and males who have sex with males (MSM) (aHR 0.89; 95% CI 0.80-0.98) compared with heterosexual exposure. Delayed entry into HIV care remains a challenge in controlling HIV transmission in SC. Better integration of testing and care facilities could improve the proportion of newly HIV-diagnosed persons who enter care in a timely manner.

Late HIV diagnosis in Houston/Harris County, Texas, 2000-2007

This cross-sectional study aimed to evaluate the prevalence and predictive factors associated with late HIV diagnoses in Houston, Texas using surveillance data. Study subjects were Houston/Harris County residents, 13 years or older, diagnosed with HIV and reported to the Houston Department of Health and Human Services. Late HIV diagnosis was defined as an AIDS diagnosis within three months of an HIV diagnosis. Logistic regression was used to investigate the association between late HIV diagnoses and predictive factors. We found 31% of the study population had late HIV diagnoses. The Hispanic population, men, older individuals, heterosexuals, and those diagnosed in private facilities were more likely to receive late HIV diagnoses. Sensitivity analysis was conducted to evaluate the effect of time from HIV to AIDS diagnosis on the prevalence of a late diagnosis, and on the predictors of late diagnosis. The sensitivity analysis showed time affects prevalence, but not the odds ratios of the risk factors for late diagnosis. This finding suggests HIV prevention programs should specifically target these populations at risk for late HIV diagnosis to encourage frequent HIV testing.

Risk-based HIV testing in South Carolina health care settings failed to identify the majority of infected individuals

To provide evidence of large numbers of missed opportunities for early HIV diagnosis we designed a retrospective cohort study linking surveillance data from the South Carolina HIV/AIDS Reporting System to a statewide all payer health care database. We determined visits and diagnoses occurring before the date of the first positive HIV test and medical encounters were categorized to distinguish visits that were likely versus unlikely to have prompted an HIV test. Of the 4117 HIV-positive individuals newly diagnosed between 2001 and 2005, 3021 (73.4%) visited a South Carolina health care facility one or more times prior to testing HIV positive. Of these 3021, 1311 (43.4%) were late testers, and 1425 (47.2%) were early testers. Females were less likely than males to be late testers (odds ratio [OR] 0.55, 95% confidence interval [CI] 0.45-0.68), blacks were more likely than whites to be late testers (OR 1.37, 95% CI 1.10-1.71), and persons 50 years of age and older more likely to be late testers (OR 7.16, 95% CI 3.84-13.37). A total of 78.8% of the 13,448 health care visits for both late and early testers were for health care diagnoses unlikely to prompt an HIV test. These findings underscore the need for more routine HIV testing of adults and adolescents visiting health care facilities in order to facilitate early diagnosis.