HIV Care Continuum among Postpartum Women Living with HIV in Atlanta

Meade, Christina M.; Badell, Martina; Hackett, Stephanie; Mehta, C. Christina; Haddad, Lisa B.; Camacho-Gonzalez, Andres; Ford, Joy; Holstad, Marcia M.; Armstrong, Wendy S.; Sheth, Anandi N.

doi:https://doi.org/10.1155/2019/8161495

Infectious Diseases in Obstetrics and Gynecology

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Abstract Introduction Methods Results Discussion Conclusion Data Availability Disclosure Conflicts of Interest Acknowledgments References Copyright Related Articles

Research Article | Open Access

Volume 2019 | Article ID 8161495 | https://doi.org/10.1155/2019/8161495

HIV Care Continuum among Postpartum Women Living with HIV in Atlanta

Christina M. Meade,¹Martina Badell,^2,3Stephanie Hackett,⁴C. Christina Mehta,⁵Lisa B. Haddad,^2,6Andres Camacho-Gonzalez,^4,7Joy Ford,⁴Marcia M. Holstad,⁸Wendy S. Armstrong,^2,9and Anandi N. Sheth^2,9

Academic Editor: Susan Cu-Uvin

Received29 Nov 2018

Accepted04 Feb 2019

Published14 Feb 2019

Abstract

Introduction. While increased healthcare engagement and antiretroviral therapy (ART) adherence occurs during pregnancy, women living with HIV (WLWH) are often lost to follow-up after delivery. We sought to evaluate postpartum retention in care and viral suppression and to identify associated factors among WLWH in a large public hospital in Atlanta, Georgia. Methods. Data from the time of entry into prenatal care until 24 months postpartum were collected by chart review from WLWH who delivered with ≥20 weeks gestational age from 2011 to 2016. Primary outcomes were retention in HIV care (two HIV care visits or viral load measurements >90 days apart) and viral suppression (<200 copies/mL) at 12 and 24 months postpartum. Obstetric and contraception data were also collected. Results. Among 207 women, 80% attended an HIV primary care visit in a mean 124 days after delivery. At 12 and 24 months, respectively, 47% and 34% of women were retained in care and 41% and 30% of women were virally suppressed. Attending an HIV care visit within 90 days postpartum was associated with retention in care at 12 months (aOR 3.66, 95%CI 1.72-7.77) and 24 months (aOR 4.71, 95%CI 2.00-11.10) postpartum. Receiving ART at pregnancy diagnosis (aOR 2.29, 95%CI 1.11-4.74), viral suppression at delivery (aOR 3.44, 95%CI 1.39-8.50), and attending an HIV care visit within 90 days postpartum (aOR 2.40, 95%CI 1.12-5.16) were associated with 12-month viral suppression, and older age (aOR 1.09, 95% CI 1.01-1.18) was associated with 24-month viral suppression. Conclusions. Long-term retention in HIV care and viral suppression are low in this population of postpartum WLWH. Prompt transition to HIV care in the postpartum period was the strongest predictor of optimal HIV outcomes. Efforts supporting women during the postpartum transition from obstetric to HIV primary care may improve long-term HIV outcomes in women.

1. Introduction

Despite the availability of effective antiretroviral therapy (ART), many patients living with HIV in the United States do not achieve viral suppression, contributing to AIDS and non-AIDS morbidity and mortality and ongoing HIV transmission [1–4]. The HIV care continuum provides a framework for evaluating the quality of HIV care and identifies where drop-offs occur [5–8]. Recent recommendations for pregnancy and postpartum care mirror those of the HIV care continuum and support ongoing comprehensive postpartum care, i.e., the 4th trimester, emphasizing prenatal interventions to increase postpartum engagement in care, and the importance of a successful transition to primary care, particularly for women with chronic conditions [9]. For women living with HIV (WLWH), pregnancy provides an opportunity to optimize both the postpartum and HIV care continua. However, loss to follow-up, ART discontinuation, and the consequent lack of viral suppression frequently occur. In the US, less than 40% of WLWH are retained in care after delivery [10–19].

The majority of the over 280,000 WLWH in the United States live in Southern states, contributing to the nearly 8,500 WLWH who become pregnant annually [20–22]. Due to HIV testing and prompt initiation of ART, perinatal transmission has markedly decreased, but transmissions continue, particularly in the Southern US. The majority of infants with perinatal HIV are born to women who were diagnosed with HIV before pregnancy [23], underscoring the importance of optimizing HIV reproductive healthcare before and between pregnancies to eliminate perinatal transmissions. Further, in the Southern US, rates of postpartum obstetric visit attendance are as low as 85%, compared to the national average of 90% [24]. Few studies have evaluated postpartum reproductive and HIV outcomes for women in the South, particularly in contemporary periods when ART continuation after delivery is recommended regardless of CD4 cell count and modern regimens are used. We therefore sought to evaluate HIV and reproductive health outcomes during pregnancy and up to two years postpartum and to identify associated factors among WLWH in Atlanta, Georgia in the modern ART era.

2. Methods

2.1. Study Population and Data Collection

Data were collected by electronic medical record review of all WLWH who delivered at a large publically-funded healthcare system in Atlanta, Georgia, with at least 20 weeks gestational age, from January 1, 2011, to November 30, 2016. Supplementary data were available through August 1, 2016, from the Georgia Department of Public Health (DPH) enhanced HIV/AIDS Reporting System (eHARS) for the study population for women who did not have documented HIV follow-up within the healthcare system during all postpartum time points. Approval was obtained from the Emory University and state and institutional review boards. The study obtained a waiver of consent by the Emory University institutional review board, as it was minimal risk and did not adversely affect the rights and welfare of the subjects.

2.2. Sociodemographic and Clinical Variables

Sociodemographic and clinical data were collected from the electronic medical record beginning with each patient’s entry into prenatal care until 24 months after delivery, including age, race/ethnicity, year of HIV diagnosis, mode of HIV infection, ART history, HIV resistance, CD4 and HIV-1 RNA (viral load) results, gravidity, parity, number of prenatal care visits, mode of delivery, gestational age at delivery, birth outcome, attendance of postpartum obstetric follow-up (within 90 days), time to first postpartum HIV care visit, and contraceptive plan and use. Subsequent pregnancy was determined for all study participants through November 30, 2016, including those that resulted in abortion or delivery at outside hospital. Transition to HIV primary care postpartum occurred at the time of the first HIV care visit or viral load measurement (excluding viral loads checked at the postpartum obstetric visit). For each postpartum HIV care visit, viral load, method of contraception, pregnancy status, ART regimen changes, adherence, and transfers of care were recorded. Additional CD4 count and viral load data were obtained from eHARS.

2.3. Primary Outcomes

Retention in HIV care was defined as two HIV care visits or viral load measurements, greater than 90 days apart [25]. This was determined for the initial 12 months (1-365 days postpartum) and the subsequent 12 months (366-730 days postpartum), which were defined as 12 and 24 month retention, respectively. Viral suppression was considered achieved if the last HIV RNA viral load was ≤200 copies/mL in the 12 and 24-month periods, respectively. Viral suppression or retention was required at 12 months to be considered suppressed/retained at 24 months. Viral suppression was not dependent on retention. Women with no viral load data were assigned to have a viral load value of >200 copies/mL. Upon inclusion of eHARS data, the additional women retained or virally suppressed affected outcome estimates by less than 4%. Thus, since eHARS data were only available through August 1, 2016, these data were used to estimate outcomes but not for analyses of associations, for which women who reported follow-up outside the healthcare system were excluded.

2.4. Statistical Analysis

In the event of multiple deliveries for a woman, the first recorded delivery was used for analysis. Descriptive statistics were used as appropriate. Bivariate analyses were conducted using t-tests, Wilcoxon rank sum, and chi-square tests as appropriate to determine the associations between the sociodemographic and clinical variables and each outcome.

Separate multivariable logistic regression models were used to determine factors associated with each HIV care outcome. Covariates reported in the existing literature were initially included in the model: delivery year, age, race, perinatal HIV infection, new HIV diagnosis, number of prenatal care visits, number of prior live births, ART use before pregnancy, CD4 count at presentation, viral suppression and contraceptive plan at delivery, postpartum obstetric visit attendance, and HIV primary care visit within 3 months postpartum. Covariates which were not predictive of any outcomes in bivariate or initial multivariable analyses (p>0.05) were removed from the final model only if removal did not significantly alter associations with other variables. Model fit was assessed by Hosmer-Lemeshow test, evaluation of residuals, and predictive ability. Analyses were conducted in SAS version 9.4 (Cary, NC). For all analyses, two-sided p <0.05 was considered significant.

3. Results

3.1. Demographic and Clinical Characteristics

Overall, 245 pregnancies occurred in 207 HIV positive women; 44 women had 2 or more (range 2-4) pregnancies. Overall, 78% of women were African-American, the average age was 28.1 years; women had a median of one prior live birth (Table 1).

The majority acquired HIV sexually (59%); 11% were perinatally infected. Pregnancy occurred a median of 3 years since HIV diagnosis, and almost a quarter of women were diagnosed with HIV during the index pregnancy. Mean CD4 count at presentation for obstetric care was 413 cells/mm³, and 37% of women were receiving ART at time of pregnancy diagnosis, including 48% of women diagnosed with HIV before pregnancy.

3.2. Obstetric and Reproductive Health Outcomes

Women attended a median 9 prenatal care visits, and 71% of women were virally suppressed (<200 copies/mL) at delivery (Figure 1).

About half of the women had a vaginal delivery, and 99% of the infants tested HIV negative. Overall, 62% received a contraception method by discharge, most frequently depo-medroxy progesterone (DMPA) (30%); 10% chose condoms as their only form of contraception.

Overall, 76% attended a postpartum obstetric visit. Repeat pregnancy occurred in 44 (24%) of women over a median 4.3 (Q1 2.9, Q3 5.3) follow-up years. The median time between delivery and the estimated date of subsequent conception was 358 (Q1 182, Q3 632) days; 23 (52%) occurred within 1 year of delivery, and 34 (77%) within 2 years of delivery.

3.3. HIV Care Outcomes

Overall, 64% of women had an HIV primary care visit within 180 days of delivery, 37% within 90 days. For women who attended a visit, the median time to HIV care visit was 124 (Q1 70, Q3 357) days postpartum. At 12 months postpartum, 86 (47%) women were retained in care and 76 (41%) were virally suppressed. Among women who were not retained in care at 12 months, 26 (26%) re-entered care and completed two visits 90 days apart between 12 and 24 months. Among women who were not virally suppressed at 12 months, 12 (11%) became virally suppressed between 12 and 24 months. Using the pre-specified criteria that retention/viral suppression was required at 12 months to be considered retained/suppressed at 24 months, 52 (34%) women were retained in care and 46 (30%) were virally suppressed at 24 months postpartum (Figure 1). With the inclusion of the statewide HIV surveillance (eHARS) data, outcomes were 102 (50%) women retained and 85 (42%) virally suppressed at 12 months postpartum, and 63 (37%) women retained and 52 (31%) virally suppressed at 24 months postpartum.

In multivariable analysis (Table 2), retention at 12 and 24 months postpartum was associated with fewer previous live births (aOR 0.73 per live birth, 95%CI 0.56-0.95; and aOR 0.71, 95%CI 0.51-0.99, for 12-month and 24-month retention, respectively), and attending an HIV care visit within 90 days postpartum (aOR 3.66, 95%CI 1.72-7.77; and aOR 4.71, 95%CI 2.00-11.10).

Retention at 12 months was also associated with older age (aOR 1.08 per year, 95%CI 1.01-1.16). Viral suppression at 12 months postpartum was associated with ART use before pregnancy (OR 2.29, 95%CI 1.11-4.74), viral suppression at time of delivery (aOR 3.44, 95%CI 1.39-8.50), and attending an HIV care visit within 90 days postpartum (aOR 2.40 95%CI 1.12-5.16). Only age was associated with achieving viral suppression at 24 months postpartum (aOR 1.09 per year, 95% CI 1.01-1.18).

Given the association between long-term outcomes and attending an HIV care visit within 90 days postpartum, we additionally examined characteristics associated with transition to HIV primary care within 90 days. CD4 count at prenatal care entry (aOR 0.998 per unit increase in CD4 count, 95%CI 0.996-1.000), lack of contraceptive provision at delivery (aOR 3.80, 95%CI 1.76-8.18), and calendar year of delivery (aOR 1.69 per year, 95%CI 1.25-2.27) were associated with transition to HIV primary care within 90 days.

4. Discussion

Retention in HIV care and achievement of viral suppression are necessary to maximize the benefits of ART. Despite recent improvements [26], achievement of long-term retention in care and viral suppression continues to be challenging across many US populations [6, 10]. Our study, conducted in recent years in a large-volume center in the Southern US, demonstrates that postpartum WLWH still have remarkably low 12 and 24 month retention (47% and 34%) and viral suppression (41% and 30%). Notably, the suboptimal retention and viral suppression rates observed in our study were similar to those seen in postpartum women from other US populations studied before 2012, including in Philadelphia, PA [10], Jackson, MS [27], Houston, TX [17], and Chapel Hill, NC [13]. International studies report similar challenges in South Africa [28], Ghana [29], and Uganda [30] for example, with some successful interventions reported in the literature [31–33]. Further, despite high levels of healthcare engagement during pregnancy, with an average number of prenatal care visits consistent with guidelines [34], retention and viral suppression among postpartum women in our study were even lower than those previously observed among men and women initiating HIV care in the same healthcare system, where 81% and 54% of patients were retained, and 63% and 44% were virally suppressed at 12 and 24 months, respectively. [6].

Attending an HIV care visit within 90 days postpartum was the strongest and most consistent predictor of HIV outcomes, similar to a study which used city-wide data from Philadelphia [10]. Despite over 75% women attending the postpartum obstetric visit within six weeks, less than 40% of women attended an HIV care visit within 90 days. The postpartum period is often associated with a transition of care from obstetric to HIV clinics. Fragmentation of care between the antepartum and postpartum period has previously been reported to contribute to poor follow-up among women with pregnancy-related health conditions, such as gestational diabetes and pregnancy-induced hypertension [35–39]. This loss to follow-up puts women at risk for disease progression, and puts future pregnancies at risk for increased maternal and fetal complications [37, 39].

The American College of Obstetricians and Gynecologists (ACOG) recently highlighted the importance of the postpartum period and transition to primary care in a set of new guidelines, stressing the need for an individualized spectrum of follow-up over the initial twelve weeks postpartum [9]. With 50% of pregnancy related mortality and morbidity occurring in the postpartum period, it is critical to engage women in their postpartum healthcare plan during the prenatal period. This includes identifying a primary care and other providers, scheduling follow-up prior to delivery, choosing contraception, and counseling on the effects and complications of pregnancy on postpartum physical and mental health, as well as chronic conditions, such as hypertension, diabetes, mood disorders, among others. Interventions occurring during the prenatal period have been shown to improve postpartum care for women with several health conditions, including gestational diabetes [35], pregnancy-induced hypertension [39], depression [40], intravenous drug use [41], and tobacco use [42], further supporting the notion that pregnancy and the early postpartum period (the “4th trimester”) provide an opportunity to develop and implement interventions for chronic diseases requiring close follow-up, including HIV.

By analyzing data from a single healthcare system in which HIV primary care, specialized HIV/obstetric care, and pediatric care for HIV exposed infants occurs in close geographic proximity, we showed, despite minimization of operational barriers that may be expected from co-located services [43], women in our study still experienced poor transition from obstetric to HIV primary care, similar to observations from US sites with varying structures of care [10, 12]. A recent single center report from South Carolina showed that HIV-centered prenatal care, in which HIV-trained obstetric providers provide care in a model that integrates services in one location, was associated with improved maternal virologic control during pregnancy and postpartum [44], but not improved HIV follow-up care in the 12 months postpartum, suggesting, consistent with our findings, that additional steps are likely needed across diverse care settings to improve long-term outcomes [45]. Such steps may need to also include policy changes, such as addressing insurance coverage gaps parental leave policies that particularly impact women with chronic health conditions during the postpartum period.

Temporal changes occurred within and outside our healthcare system, such as community-based interventions, streamlined clinic enrollment procedures, and enhanced care coordination between HIV and obstetric services. As such, we observed that prompt postpartum transition to HIV primary care improved over time. Nonetheless, strong associations between prompt transition and improved long-term outcomes remained even after controlling for year of delivery in our models. As has been proposed for addressing challenges surrounding transition of adolescents living with HIV from pediatric to adult care [46] and in ACOG’s “fourth trimester” recommendations, a cross-disciplinary approach to integrate HIV obstetric care during pregnancy and coordinate the transition of care postpartum may thereby improve long-term HIV outcomes.

Limited evidence-based interventions exist to improve retention in care. Our findings highlight the urgent need for targeted interventions to improve outcomes in this highly vulnerable population. Previous studies have identified complex, multi-level factors associated with postpartum disengagement, such as lack of HIV disclosure, HIV-related stigma, transportation barriers, substance abuse, limited social support, and competing responsibilities such as children and work [12, 15, 27, 46, 47]. In our study, younger women and women with previous births had worse long-term retention, consistent with previous literature [17, 18, 27, 47], highlighting that a complex array of factors likely continue to contribute to poor long-term HIV care outcomes. Novel, individualized strategies are needed to identify women at the highest risk for poor outcomes and address their barriers to care.

Finally, repeat pregnancy occurred in one quarter of women, most within 1 year of delivery. While pregnancy intention was not captured in our dataset, the frequency and timing of repeat pregnancy and low uptake of highly effective postpartum contraception further emphasize the importance of integration of HIV and reproductive healthcare to improve long-term HIV care outcomes. Interestingly, contraceptive provision at time of delivery was associated with prolonged transition from obstetric to HIV primary care on multivariable analysis. This finding was likely due to increased DMPA provision at delivery for women in whom there was a high concern for loss to follow-up.

There are limitations to this study. First, as a retrospective chart review, we relied on the accuracy and scope of electronic medical records. Thus, some socioeconomic factors (ex. health insurance, housing, employment, HIV disclosure status, and partner involvement) were not consistently available. Second, this single center analysis may not be generalizable to postpartum WLWH in other settings. However, our use of statewide surveillance data, which provided rates of viral suppression and retention for the majority of postpartum WLWH regardless of location of follow-up, did not significantly alter our HIV outcome estimates and mitigates this limitation. Third, the small number of women achieving 24 month viral suppression reduced power to identify associated predictors.

5. Conclusion

In conclusion, we characterize a contemporary description of the HIV care continuum in a population of postpartum WLWH in a large-volume healthcare system in the South, the center of the HIV epidemic in the US, and the area with the highest number of perinatal transmissions. Even in the modern ART era, retention in care and viral suppression were low 1 and 2 years after delivery despite high levels of healthcare engagement during pregnancy and even lower than a historical control population of new and out-of-care patients in the same clinic. Prompt transition to HIV primary care in the postpartum period was the strongest predictor of postpartum HIV outcomes, suggesting that targeted interventions to engage women during pregnancy and the early postpartum period may improve long-term HIV outcomes in women. Further research is urgently needed to develop targeted interventions to improve HIV care outcomes for this population.

Data Availability

The datasets generated during or analyzed during this study are not publicly available in order to protect patient privacy. Data are available from Dr. Anandi Sheth, email: [email protected], 341 Ponce de Leon Ave., Atlanta, GA 30308, (404) 616-6240 (office); (404) 616-9898 (fax), for researchers who meet criteria for access to confidential data.

Disclosure

These data were presented in part at the Inter-CFAR Collaborative Symposium on HIV Research in Women 1R13AI127017-01, 12/7/2016, and the Society of General Internal Medicine Conference, Washington D.C., 4/21/2017.

Conflicts of Interest

The authors have no conflicts of interest to declare.

Acknowledgments

The authors thank the Georgia DPH (Dr. Pascale Wortley, A. Eugene Pennisi), for their collaboration and use of the eHARS database. The authors thank the Grady Health System patients, clinicians, and staff. Ms. Jeronia Blue (Grady Health System) and Drs. Neela Goswami (Emory University School of Medicine), Susan Davis (University of Texas, Austin, Department of Obstetrics and Gynecology), Emily Grossniklaus (University of Washington, Department of Gynecology and Obstetrics), and Jessica Tarleton (University of Pittsburg, Department of Obstetrics, Gynecology, and Reproductive Sciences) assisted with dataset preparation and/or collection. This work was supported by the Emory Center for AIDS Research (CFAR) [P30AI050409] and the National Institutes of Health [1K23AI114407 to ANS].

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Copyright © 2019 Christina M. Meade et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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