Comparison of Single-Visit and Multiple-Visit Measures of Retention in Care for HIV Monitoring and Evaluation

Engaging Diverse African American/Black and Latine Youth and Emerging Adults Living with HIV into Research: Description of Recruitment Strategies and Lessons Learned

Improving engagement along the HIV care continuum and reducing racial/ethnic disparities are necessary to end the HIV epidemic. Research on African American/Black and Latine (AABL) younger people living with HIV (LWH) is essential to this goal. However, a number of key subgroups are challenging to locate and engage, and are therefore under-represented in research. Primary among these are persons with non-suppressed HIV viral load, severe socioeconomic disadvantage, transgender/gender expansive identities, and refugee/migrant/immigrant populations. Research in community settings is needed to complement studies conducted in medical institutions. The present study describes the efficiency of recruitment strategies used in the community to enroll AABL young and emerging adults LWH ages 19-28 years. Strategies were designed to be culturally responsive and structurally salient. They were: peer-to-peer, social media, classified advertisements (newspaper, craigslist), subway ads, dating apps (Jack'd, Positive Singles), and direct recruitment in community-based organizations. Data were analyzed using mainly descriptive statistics and interpreted using a consensus building approach. We screened 575 individuals in a first step, 409 were eligible (71%), of these 297 presented to the second screening step (73%), but 112 were lost. Almost all presenting at the second step were eligible (98%, 291/297) and 94% enrolled (274/291). Peer-to-peer, dating app (Jack'd), direct recruitment, and craigslist were the most efficient strategies. Recruitment on dating apps was superior to the peer-to-peer approach in yielding eligible participants (OR = 1.5; 95% CI: 0.98-2.3; p = 0.06). The sample enrolled was diverse with respect to HIV viral suppression, gender identify, sexual orientation, immigration status, and barriers to HIV care engagement. We discuss the advantages and disadvantages of each strategy. Recruitment is a vital aspect of research and warrants attention in the empirical literature.

Improvement in CD4+ cell count among people with HIV in New York City, 2007-2021

BACKGROUND

A higher CD4+ cell count among people with HIV (PWH) is associated with improved immune function and reduced HIV-related morbidity and mortality. The purpose of this analysis is to report the trend in CD4+ cell count among PWH in New York City (NYC).

METHODS

We conducted a serial cross-sectional analysis using the NYC HIV registry data and reported the proportion of PWH with a CD4+ cell count of 500 cells/μl or above, overall and by sex, race or ethnicity, and age.

RESULTS

The overall proportion of PWH in NYC with a CD4+ cell count of 500 cells/μl or above increased from 38.1% in 2007 to 63.8% in 2021. Among men, the proportion increased from 36.7% in 2007 to 62.3% in 2021 with an annual percentage change (APC) of 6.6% [95% confidence interval (95% CI): 5.8-7.5] in 2007-2013 and 2.6% (95% CI: 0.7-4.4) in 2013-2017, and no changes in 2017-2021 (APC: 0.0%; 95% CI: -1.1 to 1.0); among women, the proportion increased from 41.0% in 2007 to 67.6% in 2021 with an APC of 7.5% (95% CI: 5.2-9.8) in 2007-2010, 4.5% (95% CI: 3.5-5.4) in 2010-2015, and 0.8% (95% CI: 0.4-1.2) in 2015-2021. White people had a higher proportion than other racial/ethnic groups, 70.9, 59.3, 60.9, and 61.7%, respectively, among white, black, Latino/Hispanic, and Asian/Pacific Islander men, and 69.8, 68.0, 66.3, and 69.3%, respectively, among white, black, Latina/Hispanic, and Asian/Pacific Islander women in 2021.

CONCLUSION

CD4+ cell count among PWH in NYC improved during 2007-2021, but the improvement slowed in recent years.

Years Since Diagnosis Among People Living With Diagnosed HIV in New York City

Antiretroviral treatment has greatly improved the survival of people living with diagnosed HIV (PLWDH), but little information is available on the time since diagnosis among them. Using New York City HIV surveillance data, we described the trend in the number of years since diagnosis among PLWDH during 2010-2019 and reported the mean, median, and interquartile range (IQR) of years since diagnosis among PLWDH in New York City in 2019, overall and by gender, race and ethnicity, and transmission risk. The median number of years since diagnosis among PLWDH in New York City increased from 10.5 years (IQR, 6.3-15.6) in 2010 to 16.3 years (IQR, 8.9-22.1) in 2019. By gender, transgender people had the shortest time since diagnosis, with a median of 11.4 years (IQR, 5.6-17.9), compared with men (median = 15.2 years; IQR, 8.1-21.6) and women (median, 18.5 years; IQR, 12.0-23.0). By race and ethnicity, non-Hispanic White people had been living with the diagnosis for the longest time (median = 17.4 years; IQR, 9.5-23.5), and Asian/Pacific Islander people had been living with the diagnosis for the shortest time (median = 10.1 years; IQR, 4.7-17.0). With an expected and continuing increase in the number of years since HIV diagnosis among PLWDH, programs that provide treatment and support services will need to be expanded, updated, and improved.

Retention-in-care in the PMTCT cascade: definitions matter! Analyses from the INSPIRE projects in Malawi, Nigeria and Zimbabwe

Introduction

Definitions of retention‐in‐care in Prevention of Mother‐to‐Child Transmission of HIV (PMTCT) vary substantially between studies and programmes. Some definitions are based on visits missed/made, others on a minimum total number of visits, or attendance at a final clinic visit at a specific time. An agreed definition could contribute to developing evidence‐based interventions for improving retention‐in‐care. In this paper, we estimated retention‐in‐care rates according to different definitions, and we quantified and visualized the degree of agreement between definitions.

Methods

We calculated retention in care rates using nine definitions in the six INSPIRE PMTCT intervention studies, conducted in three sub‐Saharan African countries between 2013 and 2017. With data from one of the studies (E4E), we estimated the agreement between definitions using Gwet’s agreement coefficient (AC1) and concordance. We calculated positive predictive values (PPV) and negative predictive values (NPV) for all definitions considering successively each definition as the reference standard. Finally, we used a Multiple Correspondence Analysis (MCA) to examine clustering of the way different definitions handle retention‐in‐care.

Results

Retention‐in‐care rates among 5107 women ranged from 30% to 76% in the complete dataset with Gwet’s AC1 being 0.56 [0.53; 0.59] indicating a moderate agreement between all definitions together. Two pairs of definitions with high inner concordance and agreement had either very high PPV or very high NPV, and appeared distinct from the other five definitions on the MCA figures. These pairs of definitions were also the ones resulting in the lowest and highest estimates of retention‐in‐care. The simplest definition, that only required a final clinic visit to classify women as retained in care, and classified 55% of women as retained in care, had a PPV ranging from 0.7 to 1 and a NPV ranging from 0.69 to 0.98 when excluding the two pairs afore‐mentioned; it resulted in a moderate to substantial agreement and a 70% to 90% concordance with all other definitions.

Conclusions

Our study highlights the variability of definitions in estimating retention‐in‐care. Some definitions are very stringent which may be required in some instances. A simple indicator such as attendance at a single time point may be sufficient for programme planning and evaluation.

Predicting Retention in HIV Primary Care: Is There a Missed Visits Continuum Based on Patient Characteristics?

Missing 3 + scheduled HIV primary care visits over a 1-year period increases mortality risk for people living with HIV (PLWH). We used electronic health data from PLWH (≥ 18 years old) at a southeastern US HIV clinic in 2016 to examine differences across patient-level characteristics and number of missed visits (1-2 vs. 0, 3 + vs. 0, 3 + vs. 1-2). In multivariable multinomial logistic regression analyses, poverty, lack of Ryan White HIV/AIDS Program support services, being uninsured, not having a high school degree, and being younger were significantly associated with 1-2 or 3 + missed visits (vs. 0 missed). Only poverty remained predictive of missing 3 + versus 1-2 visits (RR = 2.70, 95% CI 1.49-4.88). Patients at risk for missing 3 + visits present similar characteristics to patients who miss 1-2 visits. Interventions aimed at poverty reduction and increased access to education, health insurance, and support services may improve retention and, therefore, decrease mortality risk.

Reduction in Gaps in High CD4 Count and Viral Suppression Between Transgender and Cisgender Persons Living With HIV in New York City, 2007-2016

Objectives. To compare trends in HIV outcomes for cisgender and transgender persons living with HIV (PLWH) in New York City.Methods. We used HIV surveillance data for the analysis. We based CD4 count on the last measurement in a calendar year and defined viral suppression as the last viral load being less than or equal to 200 copies per milliliter in the calendar year.Results. The estimated number of PLWH increased from 73 415 in 2007 to 83 299 in 2016, including 606 transgender persons (0.8%) in 2007 and 1054 transgender persons (1.3%) in 2016. The proportion with CD4 count of 500 cells per cubic millimeter or more increased from 38% in 2007 to 61% in 2016 among cisgender persons versus 32% to 60% among transgender persons. The proportion with a suppressed viral load increased from 52% in 2007 to 80% in 2016 among cisgender persons versus 42% to 73% among transgender persons.Conclusions. Among PLWH in New York City, CD4 count and viral suppression improved during 2007 to 2016, with larger improvements among transgender persons, leading to narrower gaps. However, continuing efforts to improve HIV outcomes among transgender PLWH are needed to further eliminate disparities, particularly in viral suppression.

Transition from paediatric to adult care among persons with perinatal HIV infection in New York City, 2006-2015

OBJECTIVE

The aim of this study was to evaluate the transition process from paediatric to adult care among persons with perinatal HIV infection in New York City (NYC).

DESIGN

A retrospective prepost study and a matched exposed/unexposed nested cohort study.

METHODS

Using data from the NYC HIV registry, a retrospective prepost study was performed among persons who transitioned from paediatric to adult care to assess pre and posttransition retention in care (≥1 CD4 cell count/viral load in a 12-month period), CD4 cell count and viral suppression (≤200 copies/ml). A 1 : 3 matched exposed/unexposed nested cohort study was conducted to assess pre and posttransition 1-year mortality by matching persons who transitioned to adult care and persons who remained in paediatric care on calendar year (±1 year) and age at transition (±1 year).

RESULTS

A total of 735 persons with perinatal HIV infection transitioned to adult care in NYC during 2006-2015, of whom 53.9% were women, 57.7% black and 37.1% Hispanic. Pretransition (Year 0), and posttransition Year 1, Year 2 and Year 3 proportions of persons with CD4 cell count at least 500 cells/μl were 35.2, 38.3, 38.9 and 39.0%, respectively, and viral suppression were 45.9, 48.6, 51.1 and 51.8%, respectively. One-year mortality rates before and after transition were 2.3/1000 and 55.8/1000, respectively.

CONCLUSION

Persons with perinatal HIV infection in NYC who transitioned from paediatric to adult care saw improvements in CD4 cell count and viral suppression after transition. The increase in mortality after transition was likely caused by the conditions before or leading to the transition.

Using the Revised Centers for Disease Control and Prevention Staging System to Classify Persons Living With Human Immunodeficiency Virus in New York City, 2011-2015

The proportion of persons living with human immunodeficiency virus (HIV) in New York City in stage 1 (CD4 ≥ 500 cells/mm) increased from 50.6% in 2011 to 59.6% in 2015. The revised Centers for Disease Control and Prevention staging system of HIV infection is a useful tool with which to classify persons living with HIV.

Persons living with diagnosed HIV in New York City: over 50% over 50 years old

Using NYC HIV surveillance data, we estimated the annual median age of persons living with diagnosed HIV (PLWDH) and the proportion of PLWDH over 50 years old in NYC between 2008 and 2015, and described the characteristics, retention in care and viral suppression status among PLWDH in NYC in 2015, by age (<50 vs. ≥50 years old). The median age of PLWDH in NYC increased from 46.4 years (interquartile range [IQR]: 39.4, 53.2) in 2008 to 50.2 years (IQR: 39.8, 57.5) in 2015, and the proportion of PLWDH over 50 years old increased from 35.9% in 2008 to 50.6% in 2015. In 2015, by race/ethnicity, whites had the highest proportion over 50 years old (57.0%) and Asian/Pacific Islanders had the lowest (36.2%); by transmission risk, men who have sex with men were the lowest (40.0%) and injection drug users were the highest (76.1%). A large and increasing proportion of PLWDH over 50 years old presents challenges for HIV-infected individuals and healthcare system. Better social support services for HIV-infected individuals and additional training for medical and public health staff are needed.

Continuum of Care Among People Living with Perinatally Acquired HIV Infection in New York City, 2014

OBJECTIVE

The HIV care continuum outlines the steps from HIV infection to diagnosis, linkage to care, and viral suppression among people living with HIV. We examined data for steps along the HIV care continuum among people living with perinatally acquired infection in New York City using surveillance data.

METHODS

This study included data for people who acquired HIV infection perinatally and lived in New York City as of December 31, 2014. We defined "in care" as having ≥1 CD4 or viral load test in 2014, "in continuous care" as having ≥2 CD4 or viral load tests ≥3 months apart in 2014, and "virally suppressed" as having a viral load of #200 copies per milliliter in the most recent test in 2014. We estimated factors associated with viral suppression from a weighted log-binomial regression model that included sex, race/ethnicity, age, and country of birth as independent variables.

RESULTS

As of December 31, 2014, an estimated 1,596 people were living with perinatally acquired HIV infection in New York City. All were diagnosed, 96% were in care, 80% were in continuous care, and 61% were virally suppressed. The multivariable analysis showed significant differences in viral suppression by race/ethnicity and age. Black patients (59%, 534/907) were the least likely of all racial/ethnic groups examined to have a suppressed viral load. By age, compared with 73% (80/109) of children aged 0-12 years who were virally suppressed, 58% (568/987) of adults aged 20-29 years and 56% (54/96) of adults aged 30-39 years were virally suppressed; the adjusted prevalence ratio was 0.80 (95% confidence interval [CI] 0.69, 0.92) for those aged 20-29 years and 0.79 (95% CI 0.63, 0.99) for those aged 30-39 years.

CONCLUSION

The low level of viral suppression among people living with perinatally acquired infection found in this study warrants further exploration to identify the best management strategies to improve viral suppression in this population, especially those transitioning from pediatric to adult health care.

Brief Report: HIV Prevalence and the Prevalence of Unsuppressed HIV in New York City, 2010-2014

BACKGROUND

The widespread use of antiretroviral treatment made HIV prevalence no longer a good measure of population-level transmission risk. The objective of this analysis was to use the prevalence of unsuppressed HIV to describe population-level HIV transmission risk.

METHODS

Using New York City (NYC) HIV surveillance data, we reported HIV prevalence and the prevalence of unsuppressed HIV, defined as the number of persons living with HIV with an unsuppressed viral load divided by population size.

RESULTS

The estimated number of persons living with HIV in NYC increased from 79,100 [95% confidence interval (CI): 78,200 to 80,000] in 2010 to 81,700 (95% CI: 80,500 to 82,900) in 2014. HIV prevalence (≥18 years old) remained unchanged at 1.22% (95% CI: 1.21% to 1.24%) in 2010 and 1.22% (95% CI: 1.20% to 1.24%) in 2014. The prevalence of unsuppressed HIV (≥18 years old) steadily decreased from 0.49% (95% CI: 0.48% to 0.51%) in 2010 to 0.34% (95% CI: 0.32% to 0.36%) in 2014. Men had both higher HIV prevalence (1.86% vs. 0.65% in 2014) and higher prevalence of unsuppressed HIV (0.51% vs. 0.18% in 2014) than women. In 2014, the black-white ratio of prevalence of unsuppressed HIV was 5.8 among men and 26.3 among women, and the Hispanic-white ratio was 2.7 among men and 10.0 among women.

CONCLUSIONS

The prevalence of unsuppressed HIV has been steadily decreasing in NYC. As antiretroviral treatment continues to expand, programs should consider using the prevalence of unsuppressed HIV to measure population-level transmission risk.

Persons Living With HIV in the United States: Fewer Than We Thought

OBJECTIVES

To estimate the number of persons living with HIV (PLWH) in the United States and to describe their care status.

METHODS

Estimates of diagnosed PLWH in New York City and other 19 jurisdictions based on HIV case reporting were compared with those based on HIV laboratory reporting. A revised HIV care continuum was constructed based on previously published data.

RESULTS

The estimate of PLWH based on HIV case reporting was 25.6% higher than that based on HIV laboratory reporting data in New York City. There were 819,200 PLWH in the United States at the end of 2011 (plausible range: 809,800-828,800), of whom 86% were diagnosed, 72% were retained in care (≥1 care visit in 2011), 68% were on antiretroviral therapy, and 55% were virally suppressed (≤200 copies/mL).

CONCLUSIONS

The current method based on HIV case reporting may have overestimated PLWH in the United States. While we continue cleaning HIV case reporting data to improve its quality, we should take the opportunity to use comprehensive HIV laboratory reporting data to estimate PLWH at both the national and local levels.

Racial and socioeconomic disparities in viral suppression among persons living with HIV in New York City

PURPOSE

To examine differences in racial disparities across levels of neighborhood poverty and differences in socioeconomic disparities by race/ethnicity in viral suppression among persons living with HIV (PLWH).

METHODS

Using HIV surveillance data, we categorized and geocoded PLWH who were in care in New York City (NYC). Multilevel binomial regression techniques were used to model viral suppression with a two-level hierarchical structure, by including age, transmission risk, year of diagnosis, race/ethnicity, census tract poverty, and an interaction term of race/ethnicity and census tract poverty in the model.

RESULTS

There were 30,638 Blacks, 22,921 Hispanics, and 11,695 Whites living with HIV and retained in care in NYC, 2014. Compared with Blacks living in the most impoverished neighborhoods (≥30% residents living below the federal poverty level) who had the lowest proportion of viral suppression, with 75% in males and 76% in females, Whites living in the least impoverished neighborhoods (<10% residents living below the federal poverty level) had the highest, with 92% in males (prevalence ratio = 1.16; 95% confidence interval: 1.13, 1.18) and 90% in females (PR = 1.14; 95% CI: 1.09, 1.19).

CONCLUSIONS

By examining racial and socioeconomic disparities simultaneously, we were able to detect both disparities in viral suppression among PLWH in NYC.

Persistent Racial Disparities in HIV Infection in the USA: HIV Prevalence Matters

OBJECTIVES

Despite increased funding and efforts to prevent and control HIV infections in the black and Hispanic communities, racial disparities persist in the USA. We used a mathematical model to explain the phenomena.

METHODS

A mathematical model was constructed to project HIV prevalence ratio (PR), incidence rate ratio (IRR), and HIV-specific mortality rate ratio (MRR) among blacks and Hispanics vs. whites in two scenarios: (1) an annual reduction in HIV incidence rate at the 2007-2010 level and (2) an annual reduction in HIV incidence rate at the 2007-2010 level among whites (4.2 %) and twice that of whites among blacks and Hispanics (8.4 %).

RESULTS

In scenario no. 1, the PR, IRR, and MRR among blacks would decrease from 7.6 to 5.8, 7.9 to 5.9, and 11.3 to 5.3 and among Hispanics from 2.8 to 1.8, 3.1 to 1.9, and 2.3 to 1.0, respectively. In scenario no. 2, the PR, IRR, and MRR among blacks would decrease from 7.6 to 5.1, 7.9 to 2.5, and 11.3 to 4.7 and among Hispanics from 2.8 to 1.6, 3.1 to 0.8, and 2.3 to 0.9, respectively.

CONCLUSIONS

Much of the persistent racial disparities in HIV infection in the USA, as measured by PR, IRR, and MRR, can be explained by higher HIV prevalence among blacks and Hispanics. The public health community should continue its efforts to reduce racial disparities, but also need to set realistic goals and measure progress with sensitive indicators.