2.1 Ethical Statement
Secondary data was utilized in this study, which is readily available in the public domain, and survey agencies that conducted the field survey for the data collection have received prior informed consent from the respondents before data collection. There was no information that could help identify the respondents. The Indian Council of Medical Research (ICMR), Delhi; the International Institute for Population Sciences (IIPS), Mumbai; the Harvard T.H. Chan School of Public Health (HSPH), Boston; the University of Southern California (USC), Los Angeles; the ICMR-National AIDS Research Institute (NARI), Pune; and the Indian Regional Geriatric Centers (RGCs), Ministry of Health and Family Welfare, Government of India were among the collaborating organizations from which ethical approvals were obtained. The Declaration of Helsinki's guidelines for human protection were followed during the study's execution.
2.3 Conceptual Frameworks
This study examined the impact of social networks on well-being in the Indian context using a modified version of Berkman's (2000) conceptual framework. The Berkman model proposed multiple mechanisms through which social networks may promote well-being. To thoroughly explain these events, Berkman's model starts with the "upstream forces," or the macro-social environment in which the social network functions. Socioeconomic status, culture, and societal change processes are some of the broader social and cultural factors that may influence social networks' size, form, nature, and structure (Berkman & Glass, 2000).
Furthermore, in Berkman's concept, social network structure and member interaction are called the "mezzo" level. The definition of a social network is shaped by structural elements, including size (the total number of members), the closeness of members, and interaction-related features like contact frequency (Berkman & Glass, 2000). This study investigates how older social networks impact people's well-being in rural locations at the mezzo level.
According to the framework, social networks can function at the "micro" level by giving people access to resources, tangible items, social support, influence, and participation. This "micro" level of social network function is then thought to affect many aspects of well-being via several closer-in channels (Berkman & Glass, 2000). These could include reactions to psychological stress, habits that harm one's health, like smoking, behaviors that promote health, including using medical services appropriately, following prescriptions, and exercising, and exposure to contagious and non-communicable diseases.
This study employs multidimensional models of social networks proposed by Glass et al. (1997), which are based on data from the New Haven site of the National Institute on Aging's Establishment of Populations for the Epidemiologic Study of the Elderly Program (EPESE). These researchers created a measurement model that included social networks involving children, family, friends, and confidants, as well as a total social network for each study participant (Glass et al, 1997). He argued that because diverse ties with different people can serve distinct societal roles, it is important to consider each network's strength independently. Summary scores were created for each distinct type of network in Glass' model based on the quantity and frequency of interactions with members of that network. In their model, for children's network construction, they use the number of children, reciprocity of children, the proximity of children, the intimacy of children, and frequency of children variables. For relative network construction, the proximity of relatives, frequency of contacts, and non-visual contacts with relatives. Similarly, for the friend’s network, the proximity of friends, frequency, and non-visual contact are used. For a confident network, proximity of confidence, frequency of contact, and non-visual contact variables were used. In this study, we utilize the same model with some different variables based on the availability of data in the LASI survey.
In our study, we use the number of children, face-to-face contact with children, the proximity of children, and phone contact with children as variables to construct a children's network. For relative network construction, the number of relatives, face-to-face contact with relatives, and phone contact with relatives are variables. For friends’ network construction, the number of friends, face-to-face contact, and phone contact with friends are used. The number of existing confident spouses is considered a confident variable for the confident network. For data analysis purposes, these four networks are divided into upper, middle, and lower subcategories based on tertile value, which divides each network into three equal parts.
2.4 Sample and Study Area
The data for this study was obtained from the Longitudinal Ageing Study in India (LASI), Wave-1, a nationwide cross-sectional survey performed by the International Institute for Population Sciences (IIPS) Mumbai from 2017 to 2018 (IIPS, 2020). For our present study, we examined a cohort of 1255 persons aged 60 years and above, including males and females living in rural parts of Bihar and having at least one living child. The map below (see figure 1) shows the location of the study area.
Figure 1: Location map of the study area (prepared by authors using ArcGIS 10.5, India, 2024)
[Figure 1 here]
To understand the impact of certain social networks and social participation networks on depression, we evaluated the relationship between depression and socioeconomic and demographic factors in the older population of rural Bihar. To reiterate, the rationale is that in the LASI survey, the second largest sample of the elderly population was taken from Bihar (1808 sample). Within Bihar, almost 90% of the sample is from rural areas (IIPS, 2020)
2.5 Studying Elderly Social Network
Glass et al. (1997) suggested multidimensional models of social networks that incorporated ties with children, relatives, friends, and confidants for each study participant, using Confirmatory Factor Analysis (CFA) (Glass et al., 1997). This study also uses CFA to construct social networks. There are two methods of factor analysis: Exploratory Factor Analysis (EFA) and Confirmatory Factor Analysis (CFA). EFA is used when nothing is known about the factor of a constructed (latent) variable, as it is used for exploratory purposes (Mahdavi et al., 2023). In this study, we know the underlying factors of each specific network component using the Glass et al. measurement model. The purpose of using CFA in this study is to confirm and validate the factors of each network component. To construct the social network, the quantity, and regularity of interactions with members of each network category are considered to produce summary scores for each category (e.g., Friends, Family, Confident, and Children).
In the LASI survey, the following questions from the individual questionnaire were asked of the respondents: (1) How many children do you have? (2) Children are alive or decrease? (3) Children is household member or not? (4) Father alive or decrease? (5) Mother alive or decrease? (6) Number of siblings do you have? (7) Among family members, with whom you feel close relationship? (8) Number of friends do you have? (9) How often do you meet up with friends? (10) How often do you speak on the phone or mail/e-mail with friends? With whom do you share most of your matters? (IIPS, 2020). These questions were asked of each network component, including children, family, friends, and confidants. A confidant is a "person with whom you share your matters." To determine contact with the network component, (1) Daily. (2) At least once in a week. (3) At least once in a month. (4) At least once in a year. (5) Never (IIPS, 2020).
We calculated the number, proximity, and contact frequency of network members (Children, relatives, friends, and Confidence) from the responses to the above questions. In addition, we calculated the composite reliability of the constructed network variables (Children, Relatives, Friends, and Confident network).
2.6 Studying Depression Among the Elderly
Self-administered questionnaires, such as the Patient Health Questionnaire-9, the Beck Depression Inventory, and the Centre for Epidemiological Studies Depression (CESD) scale, are the primary tools for assessing depression. These scales are well-liked because of their affordability, ease of use, and user-friendliness. They typically include a series of emotional symptoms the respondent indicates as present or absent over a specified period (Fisher et al., 2007). This study uses the CESD-10 scale of 10 questions to assess depression. The total score of this scale is 30, with 10 as the cut-off point; a score above 10 is considered depressed (Andresen et al., 1994). This study used 10 questions from the LASI individual questionnaire. These questions are: (1) How often did you have trouble concentrating? (2) How often did you feel depressed? (3) How often did you feel tired or low in energy? (4) How often were you afraid of something? (5) How often did you feel you were overall satisfied? (6) How often did you feel alone? (7) How often were you bothered by things that do not usually bother you? (8) How often did you feel that everything you did was an effort? (9) How often did you feel hopeful about the future? (10) How often did you feel happy? (IIPS, 2020).
Each question has four responses- (1) Rarely or never (less than 1 day). (2) Sometimes (1 or 2 days). (3) Often (3 or 4 days). (4) Most of the time (5 - 7 days). For negative questions (questions no.1 to 4 and 5 to 8), we have followed the same coding as the LASI individual questionnaire provided (IIPS, 2020). We followed reverse coding for positive questions (questions 5 and 9 to 10). Higher scores indicate a higher level of depression. In this study, Cronbach’s alpha is 0.73, which indicates an acceptable reliability level in the measurement of depression.
2.7 Useful Statistical Tools
The four dimensions of the social network construct were evaluated for validity and reliability using Confirmatory Factor Analysis (CFA), which, as a statistical method, examines the connections between constructed (latent) and observable variables to assess a suggested measurement model. In the current study, the social networks of the children, relatives, friends, and confidants had composite reliabilities of 0.81, 0.70, 0.87, and 0.72, respectively, of the constructed variables., which indicates an acceptable level of reliabilities of the four constructed network variables.
Both bivariate and multivariate analyses were conducted to investigate the relationship between social networks and depression. The association of depression with socioeconomic and demographic background variables was examined using a chi-square test. This statistical test determines whether the difference between the observed and expected values is statistically significant. Logistic regression was used in multivariate analyses to evaluate the overall impact of social networks on depression. All four types of social networks of children, relatives, friends, and confidants were examined for their impact using two multivariate models. The first model shows the unadjusted effects of four types of social networks, whereas the second model represents the effects of four types of social networks adjusted for background variables such as age, sex, education, employment status, caste, wealth index, and living arrangement. The binary logistic regression model incorporated all variables that the chi-square test indicated to be significant in the bivariate analysis. The results' estimated odds ratios with 95% confidence intervals (CIs) were displayed.