Randomized Controlled Trial on an Educative Structured Intervention by Peer Educators to Improve HbA1c of Patients With Type 2 Diabetes in the Sikasso Region in Mali
Randomized Controlled Trial on an Educative Structured Intervention by Peer Educators to Improve HbA1c of Patients With Type 2 Diabetes in the Sikasso Region in Mali
The main objective is to assess impact of the establishment of involved patients (peer educators) network in Mali. It will be conducted by a multidisciplinary team that brings together high level skills in research projects and in peer education projects. It will be conducted in one country Mali. In the country, it will be completed in one site : the region of Sikasso. This site was chosen because It meet a functional care, access to medicines and a dynamic association of diabetic patients. Peer educators and persons targeted by the project will be recruited through Post-Test Club on diabetes (PTC). PTC will be a social support club that provides on going prevention counseling, education and support services to people who have diabetes. PTC represents an important link between patients, educators and general medical services. PTC will be defined as clubs, which are facilitated by well-trained peer educators, and will have 3 objectives: to provide social and emotional support to diabetic patients, to provide assistance in daily management and living with diabetes and to provide linkage to clinical care. To lead the sessions, in clubs, we will use a very innovative methodology for peer education: the learning nests method. To evaluate, we propose a classical randomized controlled experimental (RCT) design, with randomization at the person-level. For outcome measures, we propose change in HbA1c, increase of social and emotional support and increase of linkage to clinical care. In addition to HbA1c, we propose measuring changes systolic and diastolic blood pressure and weight.
BACKGROUND AND RATIONALE
The World Health Organization (WHO), estimates that the number of people affected by diabetes will rise from 171 million in 2000 to 366 million in 2030, representing a prevalence of 2.8% to 4.4% supposing that obesity will progress. Developing countries will then represent 76% of the world diabetic patients. This growth has justified the alarming report issued by the WHO in 2005 for a rapid mobilization on these new health needs. Access to care, treatment, education and care for complications related to diabetes is a key feature of the resolution passed by the United Nations in December 2006 on diabetes to protect people with diabetes against exclusion situation and increased vulnerability. In developing countries, the explosion of diabetes epidemic and other chronic diseases, is a direct consequence of the widespread emergence of overweight and obesity. For developing countries, the major increase of obesity, which involves both the upper classes that the popular classes, is essentially linked to the emergence of a nutritional transition defined as a gradual change of diets, including a clear increase of fats of animal origin consumption. Finally, the increase of obesity in the southern countries, thus the emergence of chronic diseases like diabetes, is strengthened by the increase of life expectancy and by the growth of physical inactivity.Education on diabetes is known through several names: education of the patient,patient's therapeutic education. All these terms question about the diabetic person's place in a continuous progress involving permanent communication with a care team and the coordination of a care programme. The therapeutic education is more and more becoming a model of care for people with diabetes. Indeed, diabetes is a complex condition, which requires an effective medical management from caregivers and a good autonomous management from the person with diabetes. This dual approach helps to promote choice of healthy lifestyles, improve the quality of life and reduce direct and indirect health costs for society. Educational approaches set up must recognize the critical and fundamental role of psychosocial factors for effective diabetes education. In 1914, Elliott Joslin published a book in which he stressed the importance of training nurses to participate to the education on diabetes and its management [10]. In 1936, insulin appeared and specialized nursing in diabetes had expanded. It became clear that nurses should develop their skills when it comes to education and counselling as well as expertise in clinical care. The publication of the DCCT studies results in 1993 and UKPDS in 1998 amended the diabetes care, from the simple reduction of glycaemia and blood pressure, to the active prevention of complications and in to the intensification of treatment. It was a turning point in the role of diabetes educator. In developed countries, diabetes educators began by considering the key aspects of the insulin doses adaptation, of the changes in eating habits and of the screening for complications, paving the way for the work of specialised nurses and of other caregivers, such as dieticians, chiropodist in diabetes education. Several studies have highlighted, in developed countries, the challenge for health professionals to implement education activities for patients. Above the consideration of the different cultural contexts, the barriers often described by professionals for the establishment of effective patient education are the availability of time and the inadequacy of the initial and continuing training. At hospital, the particular context in which education situations took place do not necessarily encourage the effective setting up of prevention and health practice in every day life. In the context of African health systems that combine low human and financial resources with a very important turn over of staff, it is very difficult to establish specific curricula for diabetes educators, but also to mobilize health staff specifically for this task. In these particular settings, the involvement of peers in the assistance in daily management and living with diabetes, the Social and emotional support and the Linkage to clinical care seems to be a perfect tighten to complement the organization of diabetes care in these countries. The reviews of several studies have shown the very positive results of this approach that can be implemented by following several methodological models. For this study we have chosen to implement and evaluate the impact of the methodology: The Learning Nests approach : Group Education focusing on understanding of key concepts and interactions with social context. This approach developed by health professionals and human sciences seems to be the best suited for the socio economic and cultural contexts which are encountered in Africa. It is based on 5 principles- the building and setting up of learning situations which are based on scientific data of the medical and social/human sciences frame (socioconstructivism, didactic, learning of adults-):
METHODS
Intended Audience and Setting
Direct beneficiaries in Mali The 150 diabetic patients directly reached by the activities The 7 peer educators trained in the action areas selected in Mali The 30 health agents of the action areas selected in Mali Families and relatives of patients reached by animations in the 2 countries (40000 persons)
Indirect beneficiaries in Mali All the diabetic patients of Mali (3% of the adult population) All the health workers involved in the care of diabetes and NCD in Mali The Malian health systems by improving the monitoring of diabetic patients and reducing complications related to diabetes The Malian population by reducing the risk factors of diabetes and NCD and increasing the quality of life
Indirect beneficiaries in Africa Diabetic patients of French and English speaking African countries which will benefit from the methodology and tools developed Health workers involved in care of diabetes in French and English speaking African countries The health systems and the populations of these countries
General care for diabetes available to Intended Audience
Between 2000 and 2003, many studies have been conducted to identify problems in the prevention and management of diabetes in Africa. These studies have shown similar results:
Health system: the presence of insulin, syringes and testing equipment is vital, but not enough. It must be accompanied by a health system with trained personnel and structures in place. Health systems in Sub-Saharan Africa are organized for the treatment of acute non chronic illnesses. In African countries, the management of diabetes was just available in 2 public structures of the capital. In these structures, the number of consultations was very high and there was no possibility to perform patient education. This situation obliged many patients to do between 500 to 1000 Km to do a diabetes consultation.
Diagnostic: there were problems at all levels with supplies of urine strips, strips for Glucometers, tubes for analyses and reagents. However this was a problem as supplies were expensive.
Education: All studies have shown great difficulty for the implementation of patient education. Indeed, the lack of decentralized consultations made the number of consultation within 3rd reference structures too important for education. The limited human and financial resources also made this education very difficult. In parallel to these problems in the health system, eating habits must be taken into account, for the establishment of adequate education.
Since 2003, Mali and Tanzania have set up advanced programs to improve prevention and diabetes care in 5 parts: research activities / Decentralization of diabetes care / Access to medicine, analysis and medical equipment / support to the creation and setting up of patient associations / primary prevention Training: After the setting up of specific modules with specialized doctors in Mali, 12 diabetes referral doctors were trained in 3 regions of Mali and in 7 communes in the capital Bamako.
Analysis, medical equipment and medicine: each structure, in which referral doctors work, has been equipped with glucometers and urinary strips with a decline of 25 percent of the price on consumables. A several months work with the Central Pharmacy of Mali (PPM) has achieved a national supply and a sharp drop in prices of insulin (actrapide and insulatard), 2 types of diabetes pills (glibenclamide and metformin), measuring strips for ketones and protein in urine, as well as syringes for injections of insulin. These new products have led to a sharp drop in costs for patients (50 percent discount for insulin and division of prices by 10 for diabetes pills). The consultations have also been equipped for the prevention and management of diabetes (measuring apparatus, scale, tensiometer, tuning fork, monofilament, tape measure, registers etc…) Association: the establishment of operational consultations made it possible, month after month, to have decentralized consultations which can take care of a great number of patients. These patients have gradually grouped into association around these consultations.
Primary prevention: wide actions, using the media and community actions, have been implemented to inform and educate people in intervention areas to bring about a change of behaviour in terms of diet, physical activity, but also in the accompanying of patients by the community.
Education: To accompany the care of patients, some first actions have been developed to start an education in health facilities.
For this project we considered it necessary to implement this project in areas where patients have access to equipped quality consultations with availability of testing equipment and medication and strong associations.
Recruitment or approaches to reaching intended audience
A PosT test Club (PTC) will be a social support club that provides on going prevention counseling, education and support services to people who have diabetes. PTC represents an important link between patients, educators and general medical and social economic services.
PTC will be defined as clubs, which are facilitated by well-trained peer educators, and will have 3 objectives:
To provide linkage to clinical care
The intervention areas of the project were selected so that clubs can be established in areas where:
The clubs will be made of diabetic patients who will be recruited in diabetes consultations in health facilities and in the diabetic patients association of the area.
Approaches to implementing peer support programs that address the three core components of peer support:
The purpose of this methodology is to set up coordinated training and education activities targeting populations with diabetes based on a pragmatic approach of appropriation and construction of knowledge that takes into account the individual, social, economic, cultural context. This work is being implemented on the basis of group modules specifically designed in their running: are studied the concrete elements of knowledge to mobilize, patients' actions, the role of health professional who is educator, indicators of progress and monitoring during sessions and on the long term. Each patient is gotten to consider the elements involved in his/her disease, and the actions that can be achieved taking into account the feasibility in his/her own context. The education monitoring is envisaged through a data compendium present in the individual books that are given to patients at the end of each education session. The education sessions are built in reference to the socioconstructivist model of learning. Theoretically located, situations are developed with reference to research work coming from different fields: they include the medical dimension (epidemiology, nutrition, endocrinology) and cognitive and social dimension of the chronic disease (learning psychology, sociology of health, Social and medical anthropology). These education sessions allow to work in an effective, assessable and durable way the knowledge coming from the medical sciences (understanding of cardiovascular risk and diabetes, food management, management of physical activity with identification of complications). Patients are gotten to realize their individual potential and social contexts in which they evolve. All the constituent elements of the situation (knowledge, representations of patients, construction of the learning situation) are subject to a detailed analysis that aims to be as objective as possible. By standing out from the prescriptive scheme which structure many education practices, these sessions doubly meet the current needs in therapeutic education: while allowing patients an access to knowledge, they also participate to the establishment of new dynamic in training of health professionals. This approach is therefore proposing a synthesis form, in action of knowledge from various scientific fields. The propositions of understanding and evaluation of the education action impact go beyond the usual practices, as they invest the scope of ordinary habits of patients (which is still insufficiently explored). The animations sessions will allow:
In practice the implementation of the methodology takes place in 4 stages:
In the frame of these 3 Education sessions, patients are required to:
During each education session, interactive workshops will allow to work on: a balanced diet, carbohydrates in the diet, cardiovascular risk and understanding of diabetes. For each situation, a one-day training will be conducted by trained peer educators with theoretical input on the issue dealt with, put in practice situation, analyses of issues outside the framework and put in "safety education". These training days will be implemented with 8-10 patients (1H 30) and 3 meetings will take place over a period of 2 to 3 months. The educational booklets will be available for patients at the end of the meeting.
The implementation of this comprehensive methodology, including the selection of action areas, the recruitment of educators as well as patients and the implementation of education through the learning nests, will allow a support by:
Approaches to evaluation
Experimental Design. we would like to propose a specific evaluation design and endpoint measures for our study site. We propose a classical randomized controlled experimental (RCT) design, with randomization at the person-level following recruitment, informed consent, and the collection of baseline data. Given the potential value of peer support to the 240 million persons worldwide with diabetes, the large majority of whom do NOT live in industrialized countries [30 ], it would be tragic to waste the opportunity to evaluate peer support in Africa by using a design that is not immediately convincing to all concerned, including the donor agencies and nations who will be asked to fund much of the future roll-out of peer support but may be quite suspicious of "evidence" from would-be aid recipients. Widespread recognition of our results by donors and African leaders and clinicians, which can only come from publication in a global journal like Lancet or BMJ or PLOS Medicine, also requires the strongest possible experimental design.
The RCT design provides the greatest possible internal validity and we see no reasonable alternative to it in our setting. A person-level randomized design is also surprisingly feasible in Mali. In these locations we have already achieved a well-functioning clinical system for diabetes care that can achieve guideline-adherent care (based on African regional diabetes guidelines and IDF guidelines for poor and developing countries). Therefore, the next step, the introduction of peer support programs, can be accomplished without inducing significant cross-contamination; that is, the creation of peer support groups will not cause major changes in the health care delivery process that will spill over to control-group subjects. Moreover, because face-time with physicians and physician-extenders is so limited in impoverished settings like ours, we do not foresee much scope for physicians (who cannot be blinded to experimental assignment) to change the treatment of controls in a compensatory way. However, to prevent this we will train all the relevant caregivers in the importance of maintaining experimental separation, and we will track all diabetes-related treatments to detect any biases that might emerge.
Outcome Measures. We propose change in HbA1c as the primary study measure because (a) it is a "hard" measure that is not subject to short-term variability or to the social-desirability bias that can influence self-reported data; (b) it responds directly to the full breadth of the behaviors that peer-support intends to modify, from diet and exercise to self-glucose monitoring to proper use of medications; and (c) it is the physiologic parameter that is most urgent for persons with diabetes to improve. In addition to HbA1c, we also propose measuring changes systolic and diastolic blood pressure, and weight.
Method for the randomization Patients will be selected in the list of diabetic patients followed in the two consultations diabetes in Sikasso.
From this numbered list a lottery will be conducted through a random number table to constitute the intervention group. From this numbered list a lottery will be conducted through a random number table to constitute the control group. We will verify that all patients randomly selected to form these groups meet the criteria inclusion of groups (see below). The randomization list will be kept by the principal investigator of the survey.
Calculation of the size of study
In this trial, patients were randomized into 2 groups:
It is assumed that in the reference group, the value of HbA1c was 8.5% with a correct standard deviation of 1.5, to correct (previous study conducted in the framework of the NGO Health Diabetes Mali underway published) and we consider that the strategy would be interesting if the assessed value of the mean HbA1c decreased by 1 percentage point HbA1c and standard deviation of 0.5 ..
In this situation, with a risk α of 5% and power 1-β of 80%, it must include 60 patients in each group. To reflect a proportion of patients lost to follow up to 20%, we decided recruit 75 patients per group were 150 patients in total
Eligibility criteria The study will be conducted among patients with type 2 diabetes followed in the decentralized units of the city of Sikasso (third administrative region of Mali). The methodology of choice for patients is described in the paragraph above. The recruitment will be held during the months of June-July 2010.
Inclusion Criteria
Criteria for non-inclusion
Data management and analysis
Data Management. We propose to require that study data be entered and verified (re-entered) from study sites via the internet, as we are currently doing in our multi-country study of the impact of diabetes, using an SQL interface that meshes with EPI-Info. By providing unique field numbers for each response-item, comparability can be maintained despite translations of text and more substantive variations that might be required from site to site. Web-based data entry can now be accomplished even from towns in Africa and we will do this for our own data even if a program-wide web-based data entry system is not developed. . We propose to store the hard copies of study forms in locked cabinets under the control of the PIs in Bamako, Mali.
Inclusion Criteria:
Exclusion Criteria: