Background

Type 2 Diabetes Mellitus is a major public health issue in India

Next only to China, India has the second largest number (>61 million) of individuals with Type 2 Diabetes Mellitus (T2DM) in the world and this is expected to nearly double by 2030 [1]. The national T2DM prevalence in 2011 was already 8.3 percent [1]. Furthermore, a large proportion of individuals are at “high risk” of progression to diabetes [1] which occurs more quickly than in most developed countries [2]. These observations, together with the high rates of complications and mortality [3] associated with T2DM, demonstrate that diabetes prevention should be an urgent priority for the government and other organizations in India.

Evidence supports lifestyle interventions for diabetes prevention

A number of efficacy trials from China [4], Finland [5], U.S.A. [6], India [7] and Japan [8] provide strong empirical support for lifestyle change programmes in preventing T2DM among individuals with impaired glucose tolerance (IGT). Reduction in T2DM incidence ranged between 42-58% in these various trials [5, 7, 9–12], with generally good maintenance for up to 20 years [4]. Moreover, behavioural interventions have been shown to be more cost-effective than drug treatment [13, 14], particularly when delivered via group-based intervention programmes [15]. A series of ensuing implementation trials conducted in different countries in recent years [7, 16–18] have now also demonstrated that the findings from efficacy trials can be replicated in ‘real world’ community settings with more feasible, acceptable and cost-effective delivery systems [19, 20] and with similar outcomes [5, 16, 21–24].

Transferability and uptake in resource poor settings requires critical evaluation

The majority of these efficacy and implementation trials – except the Da-Qing study in China and the Indian Diabetes Prevention Programme (IDPP) – were developed and delivered in developed countries that are very different from rapidly developing countries in terms of their health systems, culture, traditions and lifestyle behaviours related to nutrition and diet. Most of these programmes were also undertaken in countries, where there was quite a strong enabling environment of policy and other supports for the prevention and control of chronic non-communicable diseases (NCDs) aimed at increasing population awareness of lifestyle-related risk [25, 26]. These programmes have typically focused on weight loss, greater intake of fiber, reduced total and saturated fat and increase in daily physical activity [5]. Most of these programmes have also used behaviour change approaches and techniques that have emphasised outcome expectations, self-efficacy, setting of individual goals and creation of specific action plans in order to achieve lifestyle change in key behaviours. However, the socio-behavioural approaches and models on which these strategies are based have also been largely derived from health behaviour theories and models that have been primarily developed in Europe and the United States [27, 28]. Currently, there is little research concerning the factors that influence the feasibility and adaptation of T2DM prevention programmes to more resource constrained countries, cultures and settings [29].

The state of Kerala in India has high literacy (90.9%) and is the most advanced in terms of demographic and epidemiological transition, with the largest proportion of elderly and those suffering from NCDs, including diabetes [30, 31]. However, as is the case in most of India, the majority (76%) of Kerala’s 33 million inhabitants reside in non-urban areas [31]. These factors make rural Kerala an ideal setting in which to trial and develop new approaches to T2DM prevention as commentators have suggested that the rest of India is likely to become like Kerala in the future [30]. In other words, interventions developed and evaluated in Kerala have the potential to be adopted elsewhere in India in the future.

This paper describes the findings from a needs assessment for a diabetes prevention programme in Kerala by triangulating and synthesizing the evidence from three different sources:

  1. 1)

    A review of empirical studies relevant to understanding lifestyle risk factors, their determinants and lifestyle interventions for diabetes prevention in India and more specifically, Kerala.

  2. 2)

    A review of policy and other documents relevant to diabetes prevention in India and Kerala.

  3. 3)

    A focus group study concerning lay perceptions of T2DM and its prevention in Kerala.

Our aim is to show how these findings would inform the design and delivery of the intervention programme for the Kerala Diabetes Prevention Programme (K-DPP).

Methods

The methodology and conduct of data collection and analysis for each of the three data sources are described below. The needs assessment study was carried out between February 2010 and April 2012, when the final update for the literature searches was conducted.

Review of empirical studies

Research literature search was confined to studies related to diet, physical activity and tobacco use in relation to non-communicable diseases, their risk factors and determinants in India and Kerala in particular, identified through the PubMed database. Four searches were conducted in the Pubmed database using MeSH terms related to diet, physical activity, tobacco use and health promotion interventions in India. Tobacco use was included as it has recently been recognised as a risk factor of T2DM [32]. Complete search strategy and search results are presented in Additional file 1. All available abstracts were reviewed and relevant articles were obtained through the Internet or directly from the authors. Publications that were unavailable are not included in the review. Our focus was on identifying relevant epidemiological studies concerning the major social and behavioural risk factors and non-pharmacological intervention studies. For the intervention studies, we applied the following inclusion criteria: dietary, physical activity, tobacco-related or lifestyle modification interventions conducted in India among adult population (>/= 19 years) looking at individual risk factor modification alone or in combination with life-style modification for diabetes, cardiovascular diseases or NCDs and published in the last 10 years. Nine intervention studies were identified and two could not be accessed even after writing to the authors. The remaining seven studies are listed in Table 1.

Table 1 Details of completed non-communicable disease intervention studies in the Indian context
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Review of policy and other relevant documents

Policy documents related to national and state capacity, legislation, programmes and guidelines for NCD prevention and control, diet, physical activity, tobacco and alcohol were searched using Google search engine from the official websites of related government departments in India (Ministry of Health and Family Welfare, Government of India; Government of Kerala; and National Rural Health Mission). Initially the documents were accessed and reviewed by two of the authors (MD, PA). The list was then counter-checked for completion by members of the research team in Kerala (KRT, ST, NEP, EM). The reality of the reports in terms of actual work going on in Kerala was corroborated through the State Nodal Officer (NCD) under National Rural Health Mission (NRHM) in Kerala and the Additional Director of Health Services (Public Health), Directorate of Health Services, Government of Kerala.

Conduct of focus groups

A sub-group of individuals with pre-diabetes (fasting blood glucose 110–125 mg/dl), who had participated in an earlier community-based survey in Trivandrum District in 2007–2008 and residing in rural areas [33], were invited by telephone to participate in a focus group discussion (FGD) related to their views on T2DM and its prevention. Of 84 individuals, 37 had incorrect phone numbers, 13 did not respond and 16 refused to participate, resulting in 18 participants in three FGDs. The first two FGDs were conducted separately among men (n=6; age: median: 54 yrs; range: 35–64 yrs) and women (n=6; age: median: 48 yrs; range: 33–63 yrs) with focus on the community’s understanding of diabetes, sources and use of health information, and interest in and feasibility and acceptability of interventions. The third FGD (n=6; age: median: 59 yrs; range: 40–64 yrs.) had an equal number of male and female participants and built on the findings from the previous FGDs to understand more about issues related to programme implementation and delivery.

An interview guide (Additional file 2) was prepared to help the moderator (MD) cover four main areas during the focus group discussion: 1) understanding of diabetes and level of interest to know more; 2) health information sources and access to them; 3) motivation to participate in a community-based diabetes prevention programme; and 4) how such a programme should be delivered and by whom? The FGDs were conducted in a health center run by a local non-governmental organization (NGO), Health Action by People (HAP) who conducted the original research [33]. Ethical clearance was obtained from the institutional review boards of Monash University, Melbourne, Australia and Sree Chitra Tirunal Institute for Medical Sciences and Technology, Trivandrum, Kerala for the K-DPP study and its development. Moreover, telephone invitations to participate in the FGDS were issued only after individuals with pre-diabetes were identified and approached by members of the NGO and informed about the present study. In addition, all participants gave informed consent before the FGDs were conducted. The FGDs were recorded on tape and transcribed verbatim before translation into English. Manifest content analysis [34] was performed using a combination of manual and software methods (Weft QDA, version 1.0.1.). Meaning units were initially identified from the text, condensed and coded; then interlinked to identify the main themes.

Triangulation and synthesis of findings from different sources

Triangulation was used to integrate multiple data sources to improve the understanding of the diabetes problem in Kerala; to strengthen our interpretations; and to guide our decision-making to address the problem with an intervention based on available evidence [35]. In our synthesis, research literature corresponds to the currently available evidence base; policy documents reflect the policies and the programmes that underpin the public health practice related to NCDs in India; and the FGDs help inform our understanding of what people from the community really think about diabetes prevention, and how effective and realistic intervention strategies can be developed and tested.

Results

Review of empirical studies

Risk factors

Indian states show a wide variation in NCD prevalence, with Kerala ranking at the top. In comparison to the 8% age-adjusted prevalence of T2DM (fasting blood glucose >126 mg/dl or on medication) for all of India, the prevalence in Kerala ranged by gender and area from 12.3% among urban men to 22.2% among rural women. The state average is 14.3% for men and 17.8% for women. Respective figures are 51.4% and 61.5% for hypercholesterolemia (total cholesterol ≥200 mg/dl); 33.9% and 31.6% for hypertension (JNC VII); and 23.9% and 37.5% for overweight (BMI ≥25.0 kg/m2) [30].

Health behaviours

Smoking prevalence in Kerala is 28% among adult men (24% all India) [36], but almost non-existent among women. Unhealthy dietary habits are difficult to measure and compare due to the differences in definitions and the wide regional variation in composition of foods and diet found in India. Import–export data and national consumption and expenditure surveys suggest that more traditional (healthier) dietary patterns are being replaced by energy-dense (unhealthier) foods and beverages [37]. Between 1973 and 2005, energy derived from fats in India increased by 6% while energy derived from carbohydrates decreased by 7%. However the overall decline in energy from carbohydrates masked important and more specific changes; intake of coarse cereals, pulses, fruits and vegetables is inadequate and decreasing while consumption of refined carbohydrates, sugars, oils, fats, meat products and salt is increasing [37].

Physical inactivity and sedentariness among both genders is very common in India. Moreover, physical activity is related to occupation with hardly any reported spare-time activity [38]. In rural India, over 90% of the population report no vigorous or moderate physical activity during leisure-time [39]. Surprisingly, over 80% report no moderate or vigorous activity during work as well. The explanation for this is that even among those engaged in manual labour, physical activity does not really reach the required levels as work availability is erratic and seasonal and physical activity during non-work or leisure time is almost nil. Older or urban individuals, and women report more sedentary behaviour [40]. Apart from sleeping, TV viewing is the main spare-time activity [40, 41]. Figures for different types of physical activity in Kerala are from early 2000, when the proportion of adults (30–70 yrs) physically inactive was 31% during work, 74% during leisure-time, and 39% during travel [42]. However, a study conducted in 2012 suggests considerably higher figures for leisure-time inactivity (98%) [Mathews E, unpublished data]. Indirect evidence from national consumption surveys (2009–2010) also reflects this high sedentariness, as Keralites spend five times more money on TVs, 10–15 times more on motorcycles and 430–1250 times more on cars as compared to the rest of India [43].

Determinants of health behaviours have been little studied in India. A quantitative study on an urban population in Southern India reported low levels of knowledge regarding the benefits of healthy lifestyle, causes of diabetes, and measures to prevent or manage the disease, especially among women, labourers and unskilled workers, and those with lower education [44]. Management of diabetes is inadequate, not only due to poor medical control [45], but also to factors such as people’s reluctance to share information of their illnesses even with significant others [46].

A study conducted in 2012 in Kerala identified several factors positively associated with physical activity, including role models and support among family, friends and neighbours; knowledge and advice from professionals; and presence of risk factors or chronic conditions in self or family. Environmental factors - poor access to facilities and heavy traffic - had negative associations [Mathews E, Pratt M & Thankappan KR, unpublished data].

Only a few studies have reported on determinants of dietary behaviours among Indians. Negligible associations were found between diet and social cognitions such as self-efficacy and outcome expectations [47, 48]. For example, Sharma and colleagues observed a small but significant positive association between self-efficacy and eating of fruit and vegetables. Suggested explanations for the low associations were high dependency on family in health behaviour decisions [47] and a tendency to fatalism [48].

Qualitative findings from a recent large interview study from Kerala reveal many ways in which the culture enforces unhealthy lifestyle; influencing dietary practices, physical activity, as well as the taking of medications. “A protruding belly speaks of a life of embodied satisfaction – good social relationships, status, success and health” [46], p. 270. Even amidst worry about health and recognition of the risks of unhealthy eating, dietary adjustments are not made because refusing food would be seen as an expression of anger or annoyance, or as a sign of illness. As a compromise, “taking medicines (…) is palatable because it doesn’t disrupt the flow of food, care, love and pleasure in the households” [46], p. 270. Furthermore, leisure-time physical activity is seen as harmful in depleting one from energy needed for work, and it is especially discouraged among females who should focus on household chores and cooking instead [46]. This expectation is so strong that it prevails even in the younger generation after immigration into a culture that emphasizes fitness [49].

Community-based interventions

While a lot of recent medical and epidemiologic research in India has focused on NCDs [50], only a small proportion of the published studies have involved non-pharmacological interventions and only a few of these have included controlled study designs [51]. The seven interventions described in Table 1 targeted both normal population and high risk or diseased individuals, in clinical settings and ‘real world’ community settings. Only two of the studies [52, 53] used a randomised controlled trial design, many lacked a control group [22, 54–56] and none reported an explicit theory-base for behaviour change despite evidence supporting the use of theory [57]. Characteristic of many studies is inclusion of multiple components operating on different levels – individual, group, community and population – a factor likely to have influenced the outcomes positively [58]. The Diabetes Prevention and Management programme is one prime example combining community and individual empowerment. It was participatory, and included village leaders, peer educators and residents. Despite a short 7-month duration, the intervention outcomes were impressive in terms of fasting blood glucose levels across healthy, high risk and T2DM individuals. The work site intervention programme on CVD risk factors [59] also operated on multiple levels and achieved positive outcomes on multiple risk factors and health behaviours. Overall, the changes found in health behaviours and risk factors were small to moderate, but tended to be greater among those with higher risk. Furthermore, most studies had short follow-ups, insufficient to determine long-term maintenance of the outcomes.

The public health effect of these programmes is determined as much by their reach to the target population as by their effectiveness. Most studies (Table 1) show high response rates among those invited to the study, but total reach is rarely reported. As an exception, Krishnan et al. [55] reported a 25% reach for their community programme in spite of a multi-pronged approach and mass awareness campaigns.

Policy document review

India’s history of national health policy and strategies addressing NCDs is a recent one. It started with the principal comprehensive law governing tobacco control in India, the Cigarettes and Other Tobacco Products (Prohibition of Advertisement and Regulation of Trade and Commerce, Production, Supply and Distribution) Act (COTPA), 2003 [60]. However, poor implementation and monitoring prevented the public from enjoying full benefits of the law [61]. In 2004, India became a party to the WHO-Framework Convention on Tobacco Control (FCTC), subsequently leading to the National Tobacco Control Programme (NTCP, 2007–12) [62], a Government initiative to facilitate the implementation of anti-tobacco laws, bring about greater awareness on the harmful effects of tobacco, sensitize all the stakeholders and fulfill the obligations under the WHO-FCTC. Kerala joined the programme in the first wave of the roll out.

From the perspective of T2DM prevention, two subsequent Government initiated programmes are particularly significant: the National Rural Health Mission (NRHM) [63] launched in 2005, and the National Programme for Prevention and Control of Cancer, Diabetes, Cardiovascular Diseases and Stroke (NPCDCS) [64] in 2008. The NRHM aims at improving access to quality health care. The programme integrates Family Welfare and National Disease Control Programmes, incorporates village health workers called Accredited Social Health Activists (ASHA) to the programme and forms Health and Sanitation Committees at village, block and district level.

The pilot phase of the NPCDCS was launched in Kerala (Thiruvananthapuram district) in 2008, with the aim to cover all districts by 2017. The NPCDCS combines population and high risk approaches. Mass media campaigns to raise public awareness are conducted by the state NCD cells. The high-risk approach includes opportunistic screening at health care settings, patient education and risk factor monitoring by nurses and health workers, lifestyle counseling by qualified counselors, and improved medical care and supervision by medical doctors [64]. Since the implementation is currently ongoing, no evaluations have been done so far. Legislation or recommendations and responsible implementation agents for tobacco use and diet and physical activity from the documents are listed in Table 2.

Table 2 Tobacco use, diet and physical activity recommendations and their implementation
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Together, these three – national policies addressing tobacco; the NRHM to improve access to health care; and the NPCDCS that includes broad approaches to prevention – provide a base of concerted government, health sector, and community campaigns to improve health care and to promote the personal behaviours linked to prevention and disease management.

Focus groups

Content analysis revealed two main themes (Table 3): (1) What to intervene on with respect to behavioural targets and their determinants? (2) How to intervene in terms of preferences with respect to programme implementation? These themes and their sub-themes with views that emerged from the participants reveal a general interest to learn more and a common understanding that unhealthy lifestyle is related to a higher risk. However, they also showed misunderstandings concerning medication. Furthermore, perceptions related to risk as well as to outcomes of and self-efficacy in lifestyle change were generally low. Low male participation was not only an issue for the focus group study where most participants were females, but it was also indicated for village meetings, and the participants expected it to apply to any intervention as well.

Table 3 Responses of the focus group discussions as themes and sub-themes with descriptions
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Discussion

In this section, we provide a summary and synthesis of the findings, discuss the main strengths and limitations of the needs assessment, and outline the implications for designing a diabetes prevention programme for the rural setting of Kerala.

Summary and synthesis of main findings

The findings on clinical risk factors and disease, and related lifestyle behaviours with their environmental and individual determinants, as well as main characteristics of current policies, programmes and interventions to prevent non-communicable diseases in India are summarised in Figure 1.

Figure 1
figure 1

Summary of findings from the needs assessment study. This figure summarizes the findings of the needs assessment for the Kerala Diabetes Prevention Programme through triangulation and synthesis of evidence from three major sources of information: research literature review, policy document review and focus group study.

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Prevalence of clinical and anthropometric risk factors is very high and increasing in the whole of India, and Kerala is the most advanced state in the transition. The changes are largely attributable to lifestyle, which is rapidly changing towards unhealthier patterns. While the unhealthy dietary patterns and sedentary lifestyle are typical for both genders, they are more common among women, which is reflected in women’s higher prevalence of T2DM [30]. Furthermore, sedentariness related to work, leisure-time and commuting applies not only in urban India but is also typical to the rural areas [39, 65].

Many of the environmental determinants for unhealthy behaviours, e.g., accessibility, availability, and cultural values and norms are likely linked to each other. Furthermore, they probably contribute to many personal determinants such as low self-efficacy for behaviour change in the context of the strong influences of family decision-making and norms. Taking the environmental determinants as primary targets for intervention may not be feasible. However, the personal determinants are not sufficient targets alone, either. Rather, it may be unrealistic to expect better health behaviour outcomes, unless, the intervention addresses the influence of families and neighbours as well as the culturally inscribed roles of men and women in their families and communities.

Intervention research in India suggests that risk reduction is possible, but current evidence available from community settings is rather limited. In the absence of supports available for such programmes in developed countries (e.g., intensive schedules; special low calorie diets; extra resources for participants; free access to supporting facilities like gyms) [5, 6], the risk reduction from intervention studies in India and similar settings will likely be more moderate. Previous research has established models in India for multi-level strategies including mass awareness campaigns, community empowerment, and individual empowerment [22, 52–56, 59]. However, the low reach of interventions in the community is a challenge, especially among those with higher needs, including rural people [55, 66]. Another challenge is related to the use of relevant socio-behavioural theories, which is currently rare in interventions conducted in India. While studies from developed countries show that use of theory increases intervention effectiveness [57], the existing theories have been neither developed nor adequately tested with Indian populations to determine their usefulness in India. The qualitative findings from our needs assessment suggest that theoretical constructs such as self-efficacy and outcome expectations will likely have validity across cultures. However, their application in collectivist and family-oriented cultures will need further development in order for them to guide efforts at promoting behaviour change in India.

National programmes for tobacco control and prevention and control of major NCDs including T2DM have also been implemented in the state of Kerala. While the concerned government bodies have taken disease prevalence and morbidity and mortality patterns into consideration, the scientific basis for the proposed policies and programmes is not very clear in any of the accessed programme or policy documents. Moreover, their effectiveness has not been evaluated, thus limiting their usefulness to that of a positive reinforcer due to the launch of the mass awareness campaigns. In any case, these developments have prepared the ground for the development of NCD prevention programmes as well as promoting awareness among population and health professionals. In addition, their organizational infrastructure may provide local level resources to support intervention implementation by integration of many local agents such as village committees and village health workers like the ASHAs.

Strengths and limitations

This study not only provides a quite comprehensive assessment of needs but also of available capacities and supports for T2DM prevention in Kerala. The findings are derived from a systematic review of major intervention studies as well as epidemiological research on social and behavioural risk factors conducted in India. The evidence is triangulated with two other major sources of information, that is, a review of policy development in relation to the prevention and control of NCDs as well as, a focus group study. However, the search for relevant policy documents was confined to the Internet and it focuses primarily on national policies and programmes. Where possible, local experts in Kerala were used to fill any gaps in relation to policies developed and implemented in Kerala. Although the small number of focus groups and low participation rate is an important limitation, there was good consensus between our major findings and those of other qualitative and quantitative studies having bigger samples, thereby increasing the external validity of our findings [46–49].

Implications for developing the community-based K-DPP

Selection of behavioural targets

Increasing the consumption of fruits and vegetables and reducing sugar-containing foods are important targets for diet. The concept that physical activity is an integral and vital part of all aspects of daily life, with contexts other than just the work environment, also needs to be promoted. Earlier T2DM programmes from developed countries did not focus on tobacco use because that was not yet recognised as a risk factor to T2DM. However, with the present knowledge [67] and high prevalence of tobacco use among men in Kerala, it needs to be addressed in K-DPP. Furthermore, proper use of medication and traditional remedies are also important behavioural issues to address.

Main determinants to be addressed

Risk perception and knowledge about risk factors need to be core starting points for the intervention, as both low awareness and important misconceptions related to these factors have been identified. Based on our results, it seems clear that little standard information is currently made available to people in India concerning risk of diabetes, its causes and what to do about this in order to reduce risk of progression to diabetes and its complications. Focus group responses indicated that many people perceived that progression to diabetes and going on to medications was inevitable, due to family and cultural influences, and hence, it was not really possible for the individual to do anything about this. A diabetes prevention programme should educate those at risk and their families regarding these issues and the importance of a healthy diet and physical activity for both improved prevention and control of diabetes.

When considering the psychosocial determinants of lifestyle change, it is important to emphasise the ‘social’ aspect and to adopt a more family- and community-oriented approach rather than the more individualistic approach, which has been generally used in North American and European programmes. Given the very high prevalence of hypertension, hypercholesterolemia and other associated cardio-metabolic conditions, a key message should also be that improving diet, increasing physical activity and reducing sedentariness to prevent diabetes are good health habits for the entire family to reduce risk of chronic conditions, and that this approach is not just relevant to the individual at risk of diabetes. When assessing risks and reappraising outcomes, participants should be helped to consider the implications for their families, and to set goals together with their family and others living in their household. Instead of focusing on individual control, the issues of over-eating and physical inactivity, and the identification of healthier lifestyle options need to be addressed collectively. By emphasising collective problem solving, i.e., by finding solutions to key barriers together, and by identifying collective ways for pursuing a healthier lifestyle and for providing social support to one another, individuals’ low self-efficacy could be significantly enhanced. Community empowerment, which includes identification of key community leaders, citizens, organizations, volunteers and other resources, and supporting their role in creating social norms; and planning and developing local environments that would enable more healthy lifestyles will also, be an important enabler for individual empowerment.

Intervention programme delivery

A group format for programme delivery was emphasised among our participants due to practical reasons but also as a supportive measure. Groups can integrate naturally occurring societal influences into the programme and provide channels for development of key processes within communities [68]. However, this kind of family- and community-oriented approach will also inevitably require making at least some of the group sessions available to other family members and neighbours to attend and to be involved. Additionally, peer-to-peer influences could be developed naturally to provide encouragement and assistance in reaching those who otherwise might not avail themselves of the programme [68], especially males. Low participation by males is a major threat to this approach and to address this, will require effective strategies for recruiting and maximizing the attractiveness of this kind of intervention approach for them. All of these factors provide a strong rationale for a peer support model as has been recently proposed [68].

Overall design of the study

The intervention for the Kerala Diabetes Prevention Programme is being designed with a theoretical base (theories of self-regulation and social support [16, 21, 68]), which has been shown to improve the effectiveness of interventions. Due to the relatively sparse evidence related to community-based NCD intervention research in India, many of the proposed strategies are being adapted from relevant intervention programmes undertaken in other countries that include China, United States, Australia and Finland. However, we are now able to combine these with the key elements and steps generated from our systematic review and analysis of the Indian and Kerala contexts in particular; and the various community meetings that have been held to discuss these issues during the recent piloting phase of K-DPP. However, the proposed approach will emphasize community empowerment as this has emerged both from the literature review and the focus group study as being very important. The strategies for the intervention programme are being currently piloted and further modified before the main trial commences. Finally, the rapidly evolving national and state policies and programmes focused on NCD prevention and control are also expected to provide support for K-DPP by raising awareness. Having a shared mission and understanding of the primary goals and strategies of any intervention programme with the local agents including health professionals, will also help to improve the programme reach among those with the highest need for the K-DPP intervention; as well as to ensure support for the implementation and long-term sustainability of the programme.

Conclusions

The findings of this needs assessment study provide a strong basis for community-based diabetes prevention in the rural setting and culture of Kerala. They emphasize the significance of identifying key behavioural targets and their determinants; and to the importance of addressing cultural, community and family level factors in contrast to a more individualistic approach. They also suggest a more collectivistic approach for intervention delivery, with strong involvement of those at risk as well as their family and community members. These strategies along with the evolving support to be provided by national and regional policies and programmes to improve the prevention and control of NCDs will help the K-DPP achieve its goals as a feasible and effective intervention to prevent T2DM in rural India.