Margaret Borok, University of Zimbabwe College of Health Sciences, James Hakim, University of Zimbabwe College of Health Sciences, Jean Kutner, University of Colorado Denver, Samantha MaWhinney, University of Colorado Denver, Eric A F Simões, University of Colorado Denver AND Thomas Campbell, University of Colorado Denver
The SIKO study comprises an educational intervention at both urban and rural primary care centres to increase early recognition and diagnosis of AIDS-KS, and to integrate palliative care principles into its management. The study has developed a management algorithm to include digital communication with the referral centre in Harare. It is hoped that the SIKO interventions will result in earlier diagnosis, improved quality of life, survival and retention in care of patients with AIDS-KS.Download PDF
In recent years, the prevalence of HIV-1 infection has decreased in many African countries, including Zimbabwe.1 In addition, deaths from acquired immune deficiency syndrome (AIDS) have reached a plateau: the decline is attributable partly to improved access to treatment for human immunodeficiency virus type 1 (HIV-1) infection following support by PEPFAR and other global health programmes. However, even with the rollout of antiretroviral therapy (ART), malignancies associated with HIV-1 infection, in particular AIDS-associated Kaposi sarcoma (AIDS-KS), remain a major cause of morbidity and mortality. AIDS-KS is the third leading cause of death among people initiating antiretroviral therapy in southern Africa. Reduction in the burden of AIDS-KS in Africa will require improved strategies to address the prevention and treatment of this malignancy, and its associated symptoms, particularly in primary care settings. In order to realize the greatest possible benefits from ART in Africa, it is important that AIDS-KS treatment strategies be developed that are feasible and sustainable in resource constrained areas.
Burden of AIDS-KS in the era of ART rollout in Africa
AIDS-KS results from co-infection with HIV-1 and Kaposi sarcoma-associated herpes virus (KSHV or human herpes virus-8, HHV-8). The high prevalence of HIV-1/KSHV co-infection in sub-Saharan Africa places 30–50% of HIV-1 infected Africans at risk for the development of AIDS-KS.2-7 The availability of ART was associated with a dramatic decrease in AIDS-KS incidence in the developed countries.8 For various reasons initiation of ART as part of AIDS-KS treatment in Africa presents unique challenges: frequent co-morbid conditions, late presentation, persisting limitations in access to ART, the need for concomitant chemotherapy and a high mortality rate. Indeed, AIDS-KS continues to be a significant cause of morbidity and mortality in sub-Saharan Africa despite increased access to ART in recent years. KS is the third leading cause of death in ART programmes in southern Africa, causing 14% of deaths after initiation of ART8-10 compared to 21% and 20% of deaths from M. tuberculosis and Cryptococcus neoformans infections, respectively.
Kaposi sarcoma burden in Zimbabwe
Zimbabwe was one of the countries around the world that was hardest hit by the AIDS epidemic with approximately 1.5 million people living with HIV-1 infection.12 Since 30% of HIV-1 infected Zimbabweans are co-infected with KSHV12, there are large numbers of Zimbabweans who are at risk of developing of AIDS-KS. Between 1987 and 1995 the incidence of KS increased over 40-fold in Zimbabwean men and over 200-fold in Zimbabwean women.14 The peak incidence of KS is in 20–40 year-old men and 20–30 year old women. Among adults, KS is the most common cancer in men and the second most common in women. For those under 15 years of age, KS remains in the top five cancers for both girls (9.5% of all female paediatric cancers in 2010) and boys (12% of all male paediatric cancers in 2010).
Treatment outcomes of AIDS-KS in Zimbabwe
In the pre-ART era, five year survival from KS in Zimbabwe was 4% compared to 15% five year survival in the United States.15 The disparity between AIDS-KS treatment outcomes has persisted despite the wider availability of ART in Africa. In recent studies conducted in Europe and North America the rate of partial or complete response to ART with chemotherapy has ranged from 30% to 80%.16-21 After 96 weeks of ART, despite suppression of plasma HIV-1 RNA below the limits of detection and significant increases in CD4+ lymphocytes, only 19% of Zimbabweans had complete or partial resolution of AIDS-KS clinical disease and 16% had died.22 The most common cause of death was infection (bacterial sepsis, pneumonia and cryptococcal meningitis), and all deaths during the first 24 weeks after the initiation of ART were attributed to infectious complications. Infections also caused significant morbidity during ART and 66% required treatment for one or more new or recurrent infections. The use of adjunctive chemotherapy was associated with a 4.8-fold increase in the odds of survival compared to ART alone. Importantly, 34% of participants had no improvement in the KS quality of life module score after 24 weeks of treatment, indicating that more effective treatment of symptoms related to AIDS-KS and associated co-morbidities is needed for a large portion of AIDS-KS patients after beginning ART.23 Compared to African AIDS patients without KS, African AIDS-KS patients have worse clinical outcomes24-25, so the discrepancies between AIDS-KS outcomes in Africa and developed countries are not solely attributable to difficulties in the use of ART in African settings. Rather, it is likely that treatment of AIDS-KS in African settings poses unique challenges and alternative, innovative approaches are needed to improve AIDS-KS treatment outcomes in Africa.
Current approach to delivery of care to people with AIDS-KS in Zimbabwe
The Parirenyatwa Hospital KS Clinic located in Harare, the capital city of Zimbabwe, serves as a KS referral centre for the northern two-thirds of Zimbabwe and provides care for approximately 1,100 to 1,200 AIDS-KS patients annually. However, Zimbabwe is predominantly a rural country and over 80% of the population lives in small towns, villages and rural areas. Medical care in these areas is provided through a system of health centres and district hospitals which are staffed by generalist medical officers and nurses. Although access to ART through these facilities is increasing through the efforts of the Ministry of Health to decentralize ART in Zimbabwe, AIDS-KS treatment is centralized at tertiary referral centres such as the Parirenyatwa Hospital in Harare where laboratory facilities and chemotherapy drugs are available; patients with AIDS-KS are often diagnosed late in the course of their illness, resulting in a high tumour burden on presentation. In a study conducted in Harare, after 96 weeks of ART, despite suppression of plasma HIV-1 RNA below the limits of detection only 19% of Zimbabweans had complete or partial resolution of AIDS-KS disease and 16% died; in addition, 34% of participants had no improvement in their quality of life after 24 weeks of treatment, indicating that more effective treatment of symptoms related to AIDS-KS and associated co-morbidities is needed for a large portion of AIDS-KS patients after beginning ART.30
Palliative care for AIDS-KS in Zimbabwe
Patients with AIDS-KS experience a high burden of pain and other chronic symptoms, over a long period of time, and have a disease course marked by cumulative exacerbations and remissions, making palliative care highly relevant to this population.27 The World Health Organization (WHO) has recognized that development of palliative care for HIV/AIDS has been relatively neglected in Africa and made enhancement of palliative care for HIV/AIDS in Africa a priority in 2002.28 Although much progress has been made in enhancing access to palliative care in Zimbabwe, little is known about the role of palliative care to improve outcomes specifically in the treatment of patients with AIDS-KS in resource-poor areas. (For this study, we are using the WHO definition of palliative care: “An approach that improves the quality of life of patients and their families facing problems associated with life-threatening illness, through the prevention and relief of suffering by means of early identification and impeccable assessment and treatment of pain and other problems, physical, psychosocial and spiritual”.) Essential elements of palliative care relevant to AIDS-KS are the focus of palliative care on providing relief from pain and other distressing symptoms and enhancing quality of life, and the applicability of palliative care early in the course of illness, in conjunction with other therapies that are intended to prolong life.26
Need for evidenced-based strategies for AIDS-KS management in Zimbabwe
As summarized, available data provide evidence that:
‰ KS is the most commonly reported cancer in Zimbabwe, despite increased availability of ART for the treatment of HIV-1 infection;
‰ since advanced AIDS-KS is often refractory to ART alone and optimal treatment usually requires combination ART and chemotherapy, earlier diagnosis of KS by primary care providers could improve treatment outcomes and provide cost savings;
‰ infectious complications are a common cause of morbidity and mortality during treatment of AIDS-KS in Zimbabwe and better strategies are needed to prevent, diagnose and treat infections in people with AIDS-KS;
‰ data on how best to incorporate palliative care approaches at the time of AIDS-KS diagnosis to improve overall treatment of AIDS-KS are lacking;
‰ access to effective AIDS-KS treatment in community settings is limited.
Therefore, in order to provide effective medical care to people with AIDS-KS, alternative strategies for the sustainable delivery of AIDS-KS care in Zimbabwe and other African settings must be developed. Effective and efficient management of AIDS-KS in resource-constrained settings will require the integration of KS screening, diagnosis, tumour staging and treatment into primary care settings. Efforts must be made to diagnose KS in community care settings at early stages when it is most likely to respond to ART alone and thereby reduce the need for expensive and potentially toxic chemotherapy. Current international guidelines for the management of HIV infection contain few recommendations for the management of AIDS-KS (Table 1). If AIDS-KS is to be effectively managed in primary care settings, evidence-based recommendations for screening, diagnosis, staging and treatment must be developed. It was with this background in mind that the SIKO study was designed.
SIKO was designed to address the issues described above in primary care delivery in Zimbabwe. The study comprises three interventions:
‰ KS Standardized Evaluation (KS-SE). Since early KS diagnosis is highly dependent on detection of suspected lesions by clinical examination, the KS-SE (Figure 1) was designed as a simple examination tool that focuses on improving bedside diagnostic skills to assess the common clinical presentation of KS disease by thorough physical examination of the skin, mouth, internal organs and lymphatics. Information collected as part of the KS-SE will be recorded on a KS-SE flow sheet, which will serve as a written record for future reference in the clinical management of the patient by primary care providers and consultants.
‰ Palliative care education and integration of palliative care into primary care of people with AIDS-KS. SIKO will implement a training programme for all levels of primary care providers (doctors, nurses and allied health professionals) involved in the clinical assessment and management of AIDS-KS at the study sites. This will take place in conjunction with the KS training programme already being conducted. A palliative care checklist was designed in order to help site staff assess the specific palliative care needs of any patient diagnosed with KS (Figure 2). Staff will also be trained in the use of a standard quality of life questionnaire which has been used extensively in other studies of KS in Zimbabwe (Functional Living Index in Cancer FLIC).
‰ KS management strategy. An algorithm-based KS management strategy will be developed together with other materials to increase awareness and to educate the community and health providers (Figure 3). Advanced KS disease (T1 stage) will be managed in consultation with KS specialists at UZCHS. Patients who live in or near Harare will be referred to the Parirenyatwa KS Clinic for further evaluation. Currently, general care for HIV-infected patients is free in government institutions (this includes out-patient clinic consultations, cotrimoxazole prophylaxis and antiretroviral therapy); this does not include chemotherapy for which patients are charged separately as are all patients with AIDS-related and non-AIDS-related cancers. Patients in rural areas will be managed through long-distance mobile telephone consultations between primary care providers and specialists at UZCHS. The mobile KS consultations (with digital photographs as necessary) will allow KS consultants to assess patients directly in collaboration with the primary care provider and institute early chemotherapy if needed, to improve KS outcomes. Moreover, mobile specialist consultations will strengthen lines of communication between consultants and primary care providers and will provide the opportunity for further dissemination of knowledge related to AIDS-KS care to primary care providers. The mobile telephone system in Zimbabwe is well developed, and its use is feasible and affordable; there is no record of prior experience in using this strategy for distance consultation for management of AIDS-KS in a rural setting in Africa.
The SIKO strategy will be algorithm-based so that it will be easily integrated into current Ministry of Health, PEPFAR and WHO training guidelines and the national Zimbabwe guidelines. Since the WHO Integrated Management of Adolescent and Adult Illness (IMAI) for first level facility health workers is being used in many countries in sub-Saharan Africa, if the SIKO strategy is successful it will be easily adapted into IMAI guidelines assuring rapid dissemination and impact on AIDS-KS care.
The effectiveness of the SIKO interventions will be evaluated in a community-based clinical trial with randomized step-wedge design.29 Each of the eight urban and rural sites will be randomized to begin their interventions at different time points. The total length of the study will be 156 weeks and the total evaluation period (monitoring and intervention period) will be 102 weeks (2 years). More details on
the clinical trial design are available on Clinicaltrials.gov (ClinicalTrials.gov Identifier: NCT01764360).
SIKO implementation phase
The study preparation period began in mid-2012 with eight primary care sites, four sites in rural/small towns and four sites in the Harare urban area. Training materials were developed using principles of adult education and were then piloted at the Parirenyatwa Family Care Clinic. Feedback from the faculty, house officers and nursing staff was used to refine the design and individual elements of the training materials as needed, and then training of the two SIKO teams took place. This “training of trainers” served to train the SIKO monitoring team (who were trained in site monitoring) and the SIKO implementation team (who were trained in the delivery of the SIKO interventions). During the preparation phase, SIKO personnel travelled to the sites to meet with all care providers and other site staff to inform them of the purpose and general plan of the study to engage them in the study, asking for their assistance in the documentation of all KS diagnoses, and for their participation in the SIKO interventions. The latter were not described in explicit terms.
During the monitoring period, starting in January 2013, the monitoring team visited all the sites training them to keep a daily log of the total number of HIV-positive patient visits, the number of new KS diagnoses (incident cases) made that day and the number of patients already diagnosed with KS seen that day (prevalent cases). All KS patients seen at the sites were asked to participate in the study and the quality of life questionnaire was distributed. All sites continued to deliver their usual standard of care to patients. At the writing of this article the monitoring period was ongoing for all eight sites.
During the intervention period, begun in May 2013, the sites were randomly assigned to start the SIKO interventions. One additional site will begin the SIKO interventions every seven weeks. The single intervention team consists of a physician experienced in KS care, a palliative care doctor and a specialist nurse, and a KS specialist nurse. The intervention team will visit the site for a half day at the assigned start of the intervention, two weeks later and then every four weeks throughout the study. Care will be taken to ensure that the intervention team and the monitoring teams and their site visits remain mutually exclusive in order to ensure that data collection is not biased by the implementation of the intervention. During the intervention period, the three interventions will be implemented at the sites and follow-up provided as needed. At the writing of this article the intervention period had commenced at four sites.
Outcomes of the SIKO training interventions
We expect that implementation of the KS-SE as part of the SIKO intervention will lead to more active surveillance for KS disease by primary care providers. This in turn will lead to a greater number of overall KS diagnoses and, more importantly, a greater number of early stage diagnoses in primary care settings. This should lead to a broad improvement in the treatment of KS. It is expected that the SIKO intervention will enhance access to palliative care via knowledgeable primary care providers in rural and urban Zimbabwe, resulting in decreased physical and emotional symptoms of distress and, therefore, improved quality of life for patients with AIDS-KS. The outcome measure for this analysis will be the change in the FLI-C score before and after the SIKO training interventions.
We expect that the overall impact of all the interventions included in the SIKO package will be improved AIDS-KS survival and increased retention in care.
We have proposed interventions to improve AIDS-KS diagnosis and treatment in primary care settings in Zimbabwe. These interventions are currently being evaluated in a community-based clinical trial. If the evaluation of the SIKO interventions does indeed provide evidence for improved KS outcomes in Zimbabwe we will immediately begin a programme to disseminate this knowledge to a broad spectrum of primary care providers across the country in a stepped approach.
In coordination with the Zimbabwean Ministry of Health, we would conduct training in the use of the KS-SE through a series of training courses targeted at primary care providers in each of Zimbabwe’s provinces and begin work with the Ministry of Health to develop sustainable plans for expanding the distance and mobile KS and palliative care consultative services. It may be that this model would serve as a template for earlier diagnosis of other AIDS-related cancers which could possibly be prevented, and certainly better treated, if diagnosed at an early stage. l
This work was supported by a grant from the United States National Institutes of Health and the President’s Plan for Emergency AIDS Relief (CA172050).
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