Depression is a significant public health concern that is yet to be recognized as an important public health challenge. This study is very timely and significant in bringing the issue of depression among the elderly to the forefront as it is based on the nationally representative survey data. The study found that almost one-fifth (20.6%) of the elderly reported depressive symptoms. Based on 56 community-based studies in India, a meta-analysis found that the pooled prevalence of depression was 34.4 percent among elderly aged 60 + years from 1997 to 2016. A study in Bangladesh noted a higher prevalence of depression among the elderly, where almost 37 percent of the elderly reported depression [22]. Countries where the higher prevalence of depression among the elderly was reported include; 42.5 percent in Indonesia [23], 44.4 percent in Egypt [24], 23.7 percent in Thailand [25], whereas lower depression among elderly was reported in Brazil (3.8%) [26], 10.5 percent in China [27], 18.5 percent in Turkey [11]. A study based on World Health Organization (WHO) Study on Global Ageing and Adult Health (SAGE) data survey noticed that the prevalence of depression was higher in the Indian elderly than elderly in Mexico, Ghana, China, Russia, and South Africa [28]. The difference in the prevalence of depression among the elderly could be attributed to cultural differences, genetics, environmental factors, or even methodological or sampling differences [29]. However, taken together, all these studies reinforce an argument for placing greater importance on the mental health issues of older people.
This study revealed evidence of gender differences in depression among elderly people in India. The results found that the prevalence of depression was higher among elderly women than in elderly men. This finding is corroborated with the previous studies in different settings [17]. However, few studies noted an otherwise result where male elderly had a higher prevalence of depression than female elderly [19]. Worth mentioning, a few studies failed to notice any gender differences in depressive symptoms among older people [20]. Furthermore, gender differences persist with various background characteristics, disfavouring older women. The female disadvantages in depression were observed in age, living arrangement, education, wealth index, working status, self-rated health, and IADL disability, which are similar to the findings of another study in the Indian context [17]. Studies worldwide noticed that women tend to live longer than men, however, with worse health [30]–[33]. The fact that a larger share of Indian women than men never attended school may also partially explain the gender differences in depression [17]. Various studies have noted education as a significant predictor of depression and poor health among the elderly and other sub-populations [1], [2], [34]–[36].
The study noted male-female gradient in depressive symptoms among the elderly, where a higher proportion of elderly females reported depression than their male counterparts. However, while examining SES-related inequality in the prevalence of depression, education was a significant factor explaining the SES-related inequality in the prevalence of depression among female elderly and not in male elderly. This signifies that education predicts SES-related inequality in the prevalence of depression only among elderly females. Results also noted that a higher proportion of uneducated elderly women in rural and urban areas reported depression than highly educated elderly women in rural and urban areas. Previously available literature suggests that male-female difference in various cognition-related parameters could be controlled by education status among the elderly [33]. Given that education inequality disfavours women in India, the study findings are not surprising at all. Better schooling during early years promote the development of brain reserve capacity, which could be a plausible explanation of higher depression level among uneducated female elderly [37]. Various studies agree with the brain reserve hypothesis and found educational attainment to be associated with various mental health issues [38], [39].
Consistent with several studies in India [17], [28], [29], [40]–[42], this study noted a higher proportion of depression among rural elderly than in urban elderly. Poor education attainment among rural people than their urban counterparts could explain the paradox of higher depression among rural elderly in parts. Better educated people tend to attain a greater sense of control, which further facilitates their adaptive strategies for coping with mental health [43]. Lack of social support in the rural areas due to rural to urban migration of the younger population could also be a probable reason for higher depression among rural elderly in India [40]. Lack of professional health services in rural areas could also be another important factor of higher depression among rural elderly. Moreover, an underqualified and untrained medical professional in rural areas [44] could also be a significant factor for higher depression levels in rural elderly. Also, treatment-seeking is relatively lower in rural areas than in urban areas [45], which could further be attributed to higher reporting of depressive symptoms among rural elderly.
The study noted that depressive symptoms were higher among those with severe ADL and IADL disability and reported poor self-rated health. Furthermore, the study reported a significantly high SES-related inequality in the prevalence of depression among the elderly attributed to IADL disability and self-rated health. It could be inferred that IADL disability and self-rated health are the two important predictors explaining depression among the elderly. Previous research agrees with the above findings [17], [46], [47]. Those with poor self-rated health might perceive their health negatively, which could be a plausible explanation of higher depression. Difficulties of IADL make it tough to perform social roles and a reduced sense of mastery among older people and interrupt their independent living; all this could lead to higher depression among elderly with severe IADL [48], [49].