The role of interpersonal trust in health and wellness has been a subject of expanding interest across various fields of social science (Szreter & Woolcock, 2004), public health (Kawachi, 2018; Kawachi et al., 2010) and epidemiology (Kawachi et al., 1997). Interpersonal trust is considered 'moral resource' that promotes mutual reciprocity within social networks and exerts a defensive impact on individuals' health and well-being. Trust might influence health through some possible mechanisms: providing social support, enforcing informal social control, production of collective efficacy, and the dispersion of health-related knowledge (Berkman et al., 2014; Kawachi et al., 2010). Previous theoretical studies have identified two distinct types of interpersonal trust, generalised trust and particularised trust, and highlighted their distinct role in individuals' lives (Yamagishi & Yamagishi, 1994). Generalised trust refers to a disposition to trust people in general, including strangers and individuals beyond one's immediate social circle. It allows individuals to trust and rely on others beyond their immediate social network and, can facilitate access to resources and support and has been found to contribute to a sense of control, provide health-related information, and promote healthy behaviours. On the other hand, particularised trust is developed within close social relationships, such as family, friends, neighbours, and colleagues, based on regular interactions and familiarity (Erickson, 2003). Due to such distinction, the scope of generalised and particularised trust differs, and their health-protective mechanisms are often exclusive to each other. Most of the research conducted in the Western context treated interpersonal trust as a monolithic unidimensional concept, typically measured as respondents' agreement that 'most people can be trusted' and thus overlook particularised trust or the trust in specific individuals like family, friends, and significant other. Due to the widespread emphasis on generalised trust, little is known about particularised trust and its influences on health. While many scholars have begun to highlight the theoretical differences between these two types of trusts, only a handful of studies have simultaneously examined the role of two widely discussed dimensions of interpersonal trust that are generalised and particularised (Glanville & Story, 2018; Kim, 2018). This study aims to distinguish generalised and particularised trust, concentrating on their possible impact on health.
The research on the relationship between interpersonal trust and health has primarily focused on Western contexts, with limited attention given to non-Western developing countries. Recently, there has been a call to extend the assessment of interpersonal trust based on diverse health outcomes in low- and middle-income countries (LMICs). Particularly in the Indian context, only a few studies have investigated the role of interpersonal trust in relation to health (Samanta, 2014; Himanshu, 2019). In low- and middle-income countries (LMICs) such as India, the influence of interpersonal trust on health outcomes is especially critical as these countries often grapple with challenges like sparse social protection schemes and significant geographic and infrastructural barriers, limiting access to formal support services (Braveman & Tarimo, 2002; Peters et al., 2008). As a result, people commonly depend on their direct or indirect social networks, including friends of friends, for support and guidance on health-related decision making. The path to recovery from a health diagnosis involves a series of trust-dependent decisions, ranging from selecting reputable hospitals to ensuring adequate care post-surgery, and securing support in old age. Trust in one's social network becomes indispensable, particularly in the developing world, where these decisions are compounded by the inadequate reach of healthcare systems and the variability in the quality of healthcare services across different regions (Braveman and Tarimo, 2002; Peters and Muraleedharan, 2008). It is noteworthy that India has a public healthcare system, and the government hospitals are often free and highly subsidised otherwise. However, the healthcare system is marred with mismanagement, inefficiency, corruption, administrative failures, and overcrowding- to name a few (Peters et al., 2008; Kane et al., 2017). Against this background, health-related decision-making, particularly visiting a new doctor or a hospital for surgery, necessitates extensive background study and consultation from trustworthy sources. People prefer to visit physicians whom trustworthy neighbours suggest.
Further, several operational decisions between the onset of symptoms to the final prognosis of a patient, primarily streamlined through health protocols in developed nations, are often outsourced to the patient/caregiver in India. In low-income countries, including India, informal caregivers, primarily family members, play a vital role in managing health emergencies and providing daily care for individuals with chronic illnesses and disabilities. This reliance on informal caregivers is more pronounced due to the absence of robust social security systems and formal long-term healthcare support, setting these regions apart from Western countries (Hannon et al., 2016; Thrush & Hyder, 2014). Unlike in developed countries, where comprehensive care services are often integrated into the public healthcare system, Indian hospitals primarily focus on acute conditions, leaving long-term care to be managed by families and informal networks (Bhattacharyya & Chatterjee, 2020; Narayan et al., 2015). Consequently, informal caregivers in India provide essential support without any financial or state-provided physical assistance, underscoring the critical role of interpersonal trust in navigating health emergencies and care particularised trustees fulfil health needs and take care health emergency situation.
Interpersonal trust and health: Role of moderating factors
Interpersonal trust, as an individual's network resource, is unevenly distributed across social groups, and this unequal access extends to the differential returns accrued from interpersonal trust (Lin, 2000). Women and ethnic minorities frequently engage in social networks based on shared social traits, promoting particularised trust. However, these networks may lack connections across diverse social backgrounds, resulting in reduced generalised trust. The uneven distribution of two forms of trust has the potential to exacerbate health disparities across social groups. The existing literature, which predominantly focuses on the Western context, reveals substantial variations in the association between interpersonal trust and health, particularly in relation to ethnic groups and gender (Engström et al., 2008; Eriksson et al., 2011; Kavanagh et al. 2006). These scholarly sources often argue that the psychosocial risk of poor health is higher among disadvantaged social groups due to factors such as material disadvantage, poor social integration and poor networks, including perceived and actual discriminatory life experiences. All these factors can influence health directly and indirectly by heightening the level of mistrust, aggression and pessimism towards others. Further, women and racial minorities may encounter additional challenges within tightly bonded networks due to their responsibility for emotional labour. Particularised trustees within close-knit networks may inadvertently contribute to psychological strain rather than stress reduction, especially for disadvantaged racial groups (Gaffey et al., 2019; Rhodes & Woods, 1995).
The connection between interpersonal trust and health is further complicated by the broader socio cultural set up into which individuals are embedded. Although the evidence of a positive association between interpersonal trust and health status is strong, the strength and direction of the relationship vary greatly across broader socio-economic and cultural contexts (Hamamura, 2012; Islam et al., 2006). Ecological analyses focusing on developed countries revealed income inequality as one of the most prominent macrosocial characteristics that can modify the relationship between trust and health. According to the neighbourhood effects literature, income inequality imposes a detrimental effect on the quality of social relations and the level of generalised trust, leading to poor physical and mental health among its residents (Kawachi et al., 1997; Lynch et al., 2000; Marmot, 2002). Wilkinson's seminal study (1996) first linked higher income inequality in wealthier countries to lower life expectancy due to increased class conflict, deprivation, and reduced trust, leading to mortality. Kawachi et al. (1997) expanded this in a US-focused study, finding that aggregated trust mediates the relationship between income inequality and all-cause mortality.
In a contrary perspective, Islam et al.'s (2006) systematic review underscores that social capital or generalised trust yields a beneficial influence on health in nations marked by pronounced income inequality, such as the United States. The review suggests social capital can mitigate the negative impact of income inequality on health by compensating with network-mediated forms of social support. This is particularly relevant in in less egalitarian countries where income inequality is high, health care is not equally accessible to achieve a decent level of health However, in more egalitarian nations like Canada and Sweden, characterized by robust welfare systems, the role of social capital or generalised trust in health is less pronounced, as the state ensures an equitable safeguarding of citizens' well-being. Furthermore, numerous studies have also highlighted that in communities characterised by income inequality and its associated disadvantages, such as corruption, high crime rates, and public sector failure, there is often a greater reliance on particularised or small group-based trust. This reliance serves as a way to compensate for limited resources and to safeguard close relationships from exploitation by outsiders or external social networks. It is evident that the intervention of reliable neighbours, good friends, and family members in low-income communities can help overcome (or partially compensate) financial hardship or medical emergencies (Brisson & Usher, 2007; Szreter & Woolcock, 2004). However, these communities lack the resources provided by expansive connections to larger networks, which could propel them forward beyond their current circumstances. (Woolcock and Narayan, 2000).
With this background, this study aims to understand the effect of two types of interpersonal trust and their association with self-rated health and depression in the context of India using a large-scale, nationally representative sample (11230). Further, this study also examined the moderating role of individual social statuses pertinent to the Indian context and district-level income inequality in the relationship between trust and health outcomes.
Hypotheses
Micro-level factors:
Social status
Caste hierarchy and gender hierarchy are fundamental pillars of traditional Indian social structure, and they continue to be the dominant sources of socioeconomic inequality, health disparities, and equality of opportunity for upward social mobility.
Gender is considered a symbol of inequality and disadvantage in India; research in India has highlighted the ways in which gender inequality and disadvantage intersect with biological, social, and cultural factors that impact women's health (Das Gupta et al., 2003; Dreze et al., 1999). Lower socioeconomic status, heavier reproductive roles, and gender-specific socialisation render women vulnerable to health issues. Persistent gender roles in family and work compound these challenges, disadvantaging women (Lastrapes & Rajaram, 2016; Oksuzyan et al., 2018).
Existing research conducted in non-Indian contexts has highlighted the influence of gender stereotypes on networking opportunities. Traditional roles, limited public interaction, and gendered work expectations hinder broader social connections create challenges for women in building social connections beyond their immediate social circles. Consequently, women may experience lower levels of trust, resulting in a lack of social support that can adversely affect their health and well-being (Chua et al., 2016; McDonald & Day, 2010; Van Emmerik, 2006). Given India's deep gender disparities, considering gender is pivotal in understanding trust's health link.
The caste system in India is a unique cultural context for understanding intergroup disparities and social relations between groups (Borooah et al., 2014; Deshpande, 2007). It originated from the ancient 'Varna' system, which divides society into four endogamous categories based on occupational groups, each granting different levels of power and prestige (Berreman, 1972). Caste is a birth-ascriptive social status and shares similar features, functions, and implications as race. (Berreman, 1967; Milner, 1994). Caste (like race in the United States) is a significant determinant of life opportunities in India, affecting the availability of network resources. The most socially and economically disadvantaged group is the scheduled castes (SCs), historically subjected to discrimination and oppression by upper caste groups in a variety of spheres of life, including in education, the jobs market, and the social justice system.
Although the idea of caste and its impact on society have changed substantially, it remains a significant driver of disparities, creating social and political tension and inter-community distrust due to caste-based discrimination, marginalisation, and alienation (Fontaine & Yamada, 2014; Himanshu, 2018). The lack of trust and mutual reciprocity among social groups can increase anxiety and stress, affecting physical and mental health (Wilkinson & Pickett, 2009; Wilkinson et al., 1998). Caste-based social exclusion in India has a significant impact on health and increases the risk of illness for marginalised castes such as the scheduled caste. Health indicators for these groups have consistently lagged behind those of middle and upper castes due to poor living conditions, limited opportunities for social mobility, and discrimination in healthcare services (Acharya, 2007; Borooah, 2010; Nayar et al., 2007). This paper explores the relationship between interpersonal trust and health through the lens of caste, recognising that group differences involve distinct amounts and types of trust that can differentially impact health.
Motivated by the discussion presented above, I propose the following three hypotheses: the impact of gender and caste on the relationship between interpersonal trust and health.
H1
Men will have higher health benefits from generalised and particularised trust than women.
H2
Scheduled caste members will have lower health benefits from the generalised and particularised trust than non-scheduled caste members.
Macro-level factor
Income inequality
Despite experiencing significant economic growth, India has witnessed a rise in economic inequality at the national level and within and between states (Sen & Himanshu, 2004; Bandyopadhyay, 2021). Such differences are partly due to the growing divergences of income and non-inclusive economic development within the country that has existed since independence (Himanshu, 2018). India provides an excellent case study due to its distinct extremes and also for the fact that the distance between the richest and poorest states has increased substantially over the post-independence period (Bandyopadhyay, 2021). The Indian context exemplifies significant disparities and highlights the contrasting fortunes of states with evidence of divergence, polarisation, and the formation of distinct economic clubs. While some northern and western states (Haryana, Maharashtra, Punjab, and Gujarat) have enjoyed sustained prosperity, several southern states (such as Karnataka, Kerala, and Tamil Nadu) have experienced notable economic growth. However, a disconcerting pattern of persistent poverty remains in certain states like Assam, Bihar, Odisha, Madhya Pradesh, and Rajasthan over an extended period (Bandyopadhyay, 2021). Further, Intra-state inequality indices tend to be higher in districts with higher levels of living and development than in districts with lower levels of development (Mohanty et al., 2016). Analyses of the role of inequality in public health tend to be lower in the poorest countries, specially at the subnational level. This research sheds light on the importance of interpersonal trust in the context of income disparities at districts and its potential impact on the health of adults. In the context of India, districts stand as the most basic administrative entities where elected district councils formulate plans for infrastructure, development, and various essential services (Mohanty et al., 2019). District-level analysis can play a crucial role in guiding decentralised planning and ensuring the success of health intervention programs aimed at reducing inequities in the country. In high-income inequality districts, individuals may experience negative emotions such as distrust, shame, and exclusion due to their heightened awareness of their comparative socioeconomic standing and relative isolation from the rest of the population. These negative emotions may lead to chronic stress and subsequently affect their health negatively. Therefore, the study proposes
H3a. The health benefit of interpersonal trust (generalised and particularised trust ) on health status SRH and depression will be reduced in districts with a higher level of income inequality.
On the other hand, in highly unequal districts, people may be compelled to rely on their social networks and interpersonal trust to access basic medical services or receive adequate care. In such cases, little amount of trust becomes particularly crucial as a "substitute" for the lack of formal infrastructure and health care services. Therefore the study proposes
H3b. The health benefit of interpersonal trust (generalised trust and particularised trust ) on health status SRH and depression will enhance in districts with a higher level of income inequality.