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The prevalence and correlates of depression among older adults in greater Kumasi of the Ashanti region

BMC Public Health volume 23, Article number: 763 (2023) Cite this article

Abstract

Background

Approximately two million Ghanaians suffer from mental disorders including depression. The WHO defines it as an illness characterized by constant sadness and loss of interest in activities that a person usually enjoys doing and this condition is the leading cause of mental disorders; however, the burden of depression on the aged population is fairly unknown. A better appreciation of depression and its predictors is necessary to design appropriate policy interventions. Therefore, this study aims to assess the prevalence and correlates of depression among older people in the Greater Kumasi of the Ashanti region.

Methods

A cross-sectional study design with a multi-stage sampling approach was employed to recruit and collect data from 418 older adults aged 60 years and above at the household level in four enumeration areas (EAs) within the Asokore Mampong Municipality. Households within each EAs were mapped and listed by trained resident enumerators to create a sampling frame. Data was collected electronically with Open Data Kit application over 30 days through face-to-face interaction using the Geriatric Depression Scale (GDS). The results were summarized using descriptive and inferential statistics. A multivariable logistics regression using a forward and backward stepwise approach was employed to identify the predictors of depression in the study sample. All analyses were performed using STATA software version 16, and the significance level was maintained at a p-value < 0.05 and presented at a 95% confidence interval.

Results

The study achieved a response rate of 97.7% from the estimated sample size of 428 respondents. The mean age was 69.9 (SD = 8.8), and the distribution was similar for both sexes (p = 0.25). The prevalence of depression in this study was 42.1% and dominated by females, older adults (> 80 years), and lower economic class respondents. The rate was 43.4% for both consumers of alcohol and smokers with a history of stroke (41.2%) and taking medication for chronic conditions (44.2%). The predictors of depression in our study were being single, low class [aOR = 1.97; 95% CI = 1.18–3.27] and having other chronic conditions [aOR = 1.86; 95% CI = 1.59–4.62], and the inability to manage ones’ own affairs [aOR = 0.56; 95% CI = 0.32–0.97].

Conclusion

The study provides data that can inform policy decisions on the care of the elderly with depression in Ghana and other similar countries, confirming the need to provide support efforts towards high-risk groups such as single people, people with chronic health conditions, and lower-income people. Additionally, the evidence provided in this study could serve as baseline data for larger and longitudinal studies.

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Background

The life expectancy of countries continues to increase despite setbacks from global pandemics such as HIV and Covid-19 [1, 2], especially in Africa. The significant growth in the aging population could be attributed to improvements in ageing care and the general healthcare systems [3,4,5]. Global estimates suggest that there are 900 million persons aged 60 years and older currently and this figure is projected to double from 12% currently to 22% by the year 2050, translating to approximately 2 billion [4,5,6]. Likewise, the adult population above 60 years in Africa including Ghana is expected to increase from 48 million to 207 million by 2050 [4]. This means that 1-in-6 of the African population will be aged 65 years or over by the mid-century. The Ghanaian population could be described as relatively younger as 6.7% of the population is over 60 years, which translates to about 1.6 million people [7, 8]. Notwithstanding, a United Nations projection suggests that the Ghanaian population above 60 years will be between 9.7 − 14.1% of the population by the year 2050 [3, 4].

Aging is a natural phenomenon that presents with its challenges and is thus a public health concern. As individual advances in age, they begin to experience certain reduced functionalities [6, 9]. The presence of certain biological and neurological risk factors increases their susceptibility to both physical and mental health conditions including depression [10,11,12,13,14]. Depression is the leading cause of mental health-related morbidity and mortality globally including Ghana [6, 15,16,17,18]. While depression could affect anyone, it has been reported to be more prevalent in the older population affecting 7% of those aged 60 + globally [6, 14] and accounting for 5.7% of the individual’s years of living with disability (YLD) [6, 12].

The WHO defines depression as a mental condition that is characterized by a persistent state of sadness, and a loss of interest in a formally perceived rewarding or enjoyable activity and could affect an individual’s concentration, eating, and sleeping behavior [16, 19]. Depression negatively affects the individual’s social and physical functioning [14, 20,21,22] and usually presents with a loss of interest in activities, loneliness, mood swings, changes in one’s sleeping pattern, loss of sense of self-worth, and suicidal thoughts, especially in the much older adults [19, 23]. Estimates from the WHO report depression to be the major contributor to 800 000 deaths from suicide yearly [19].

The burden of depression in the older adult population has been variedly documented in developed countries like America (9.8-11.2%) [9, 24], England (8.7%) [25], Australia (8.2%) [26] and China (2.2-10.5%) [27,28,29]. Other estimates from the West suggest that up to 16% of its population shows depressive symptoms [30, 31]. Africa is not spared of this burden; for instance, in Ethiopia, the burden ranged between 28.5-45% [32,33,34]; 37.5-44.4% in Egypt [35, 36], 19-29.3% in Uganda [37, 38], 44.7% in Nigeria [39] and Sudan (47.5%) [40]. These rates are alarming and call for the need to identify all the factors that contribute to this rise in figures across the continent. Factors such as age [34, 41], sex [34, 38, 41,42,43], wealth status [13, 37, 44], poor health status [28], the existence of co-morbid conditions [12, 23, 45, 46] and modifiable lifestyle behaviors such as dietary intakes, alcohol consumption, smoking, living sedentary lifestyle [45, 47,48,49,50] have been consistently reported to be correlates of depression in the developed countries [36, 41].

Despite the overwhelming burden of depression reported elsewhere, data in Ghana is limited and the few existing ones remain scanty. A few comparative studies from the decade-old WHO’s Study on Global Ageing and Adult Health (SAGE Wave 1) data reported depression prevalence to be between 6.7 and 13.6% in the Ghanaian population [41, 46, 51].

The other existing studies did not report on the general population but focused on specific populations with conditions such as diabetes [45] and HIV [51]. Consistently reporting more on depression prevalence and identifying its associated factors will enable us to create a pool of evidence that will be of significance to policymakers, academics, and service providers. To the best of our knowledge, evidence on adults’ depression is still low compared to other health conditions which makes it impossible for policymakers to appreciate its burden in Ghana. Inadequate evidence may undermine the urgency to prioritize depression in the mental health service at the primary level of our healthcare system. This study aimed to assess the prevalence and correlates of depression among older adult in the Greater Kumasi of the Ashanti region using the Geriatric depression scale. By so doing, we hoped to add to the currently limited body of evidence on the extent of geriatric depression in Africa using a housing-a-household survey design.

Methodology

A cross-sectional study design was employed to collect data from older adults at the household level in the Asokore Mampong Municipality from 1st − 30th June 2021. The Asokore Mampong Municipality was selected due to its heterogeneous population, as parts of it are rural, peri-urban, and urban, which is a representation of the characteristics of the Ashanti region.

The study recruited both men and women aged 60 years and above who have been residing in the Municipality for at least the last 12 months prior to the survey. A sample size of 428 individuals was estimated using the Cochrane sample size estimation formulae [52]. However, this analysis included 418 individuals, given a response rate of 97.7%. Evidence from earlier studies indicates that 5.7% of older adults above 60 years are more susceptible to experiencing depression than those below that threshold [19].

The PMA2020 sampling frame was used for this study. A multi-stage sampling approach was employed to recruit participants for the study. The PMA2020 sampling methodology was adopted, and 4 enumeration areas (EA) located within the Asokore Mampong Municipality were selected from the original 100 enumeration areas used for the national survey. Details of the PMA2020 Ghana sampling approach on how the 100 enumeration areas were created is published elsewhere [53]. Firstly, the households within each of the selected EAs in the Asokore Mampong were mapped and listed by eight trained resident enumerators (RE) to create a sampling frame. Each EA had approximately 200 households from which the participants were selected. Secondly, a random selection of the listed households with the aid of the “Random Number Generator” mobile phone application was used to select households in each EA. Two resident enumerators were assigned to an EA in the municipality for the data collection exercise. Households with eligible participants were recruited for the study. The REs visited the selected households and introduced the study and those who consented were interviewed. In instances where there was more than one eligible household member, they were all interviewed. In situations where the eligible participant was not available, another interview appointment was scheduled and on a third visit, if they are still absent, that household was skipped. No replacement was done where eligible respondents in a household could not be interviewed.

Data collection

Data was collected over 30 days through face-to-face interaction using a self-drafted structured questionnaire, instrumental activities of daily living scale (IADLS), and the Geriatric Depression Scale (GDS). The tools were programmed into an electronic format and loaded onto a smartphone using the Open Data Kit (ODK) application [54, 55]. A 3-day intensive training was organized for the REs on mobile data collection, the content of the tools, and how to maintain covid-19 protocols during the data collection. The training involved the translation of the questionnaire into the local dialect to maintain consistency with the meaning after which it was pre-tested in a different municipality (Oforikrom). The questions that came out unclear were identified and addressed before the actual data collection exercise. The interviews were conducted in a private environment devoid of distractions in the participant’s preferred language either in English or the local dialect mainly “Twi”.

Data collection tool

The 8-item IADLs is a validated tool that has been used in successfully several community-based studies in different settings in sub-Saharan Africa among the aged population including Ghana [13, 56]. Additionally, the GDS is a 15-item scale that has been used widely to assess depression in the aged population [33, 57]. This scale was specifically designed for interviewing the older population not based on any physical symptoms of depression [58,59,60]. The GDS is easy to administer in different settings including the household levels to assess depression. It has been extensively tested in low-middle-income countries including Ethiopia, India, Europe and other Asian countries [23, 33, 61, 62] and it is reported to have a sensitivity and specificity of above 92% and 89% respectively in the Asian and European adult populations [61, 62]. The GDS has not been validated in any Ghanaian Setting to the best of our knowledge, nevertheless study employed rigorous measures including experts engagement to translate the questionnaire into the local language with aid of TWI Medical Glossary for clinicians and health workers developed by the Kwame Nkrumah University of Science and Technology as a guide [63].

The sum score for this scale is 15 points and each question has a binary response of ‘Yes’ or ‘No’. Ten items in the scale were positively worded such that a response of Yes is assigned a value of 1 and a ‘No’ is assigned ‘0’. On the other hand, the remaining five items were negatively worded, so the “No” response had a value of 1 and vice versa. The depression scale is categorized based on the cut-off scores which are “Non-depressed” (1–5 scores) and “Depressed” (6–15 scores) [34, 57]. Other information includes the participant’s socio-economic activities, lifestyle activities such as smoking and consumption of alcohol, health status including the presence of hypertension, stroke, and diabetes, the presence of support systems such as caretaker availability, and their ability to perform some of the instrumental activities of daily living (IADLS).

Data analysis

Data were summarized using both descriptive and inferential statistics. Continuous variables were summarized with means and standard deviation while categorical variables were presented as frequencies and percentages. A wealth index of the household was constructed based on the ownership of five basic assets/items (Television, refrigerator, fan, radio/stereo, mobile phone), availability of toilet facility, conditions on the structure they lived in (material used for the floor and wall of the structure). This index was constructed using principal component analysis and was categorized into three classes (High, middle, lower). Depression was operationalized as the presence of variables/symptoms that contribute to a score above the threshold considered normal. The dependent variable was the presence of depression (GDS ≥ 6) irrespective of the category. A chi-square (X2) was used to assess the sex differences in the socio-demographic and other risk factors. A multivariable logistics regression using a forward and backward stepwise approach was employed to identify factors that predicted possible depressions in the study sample. All analyses were performed using STATA software version 16 and the significance level was maintained at p-value < 0.05 and presented at a 95% confidence interval.

Results

Characteristics of the study sample

The mean age of the study sample was 69.9 years ± 8.8 and the distribution was similar for both sexes (p = 0.25). Being single was remarkably higher among the female participants than their male counterparts (p = 0.001). Educational status varies significantly between both sexes; 3-in-4 of the females had no formal education (76.5%). There was a difference in the religious affiliation and employment status of the men and women in this study, however, the wealth index significantly varied among the two groups (p = 0.001). Risky lifestyle behavior such as alcohol consumption and smoking varied among the two sexes; the male group dominated in both activities (p = 0.001). The number of women with co-morbidities such as diabetes (p = 0.004), hypertension (p = 0.001), and other chronic conditions (p = 0.046) was high compared to their men counterparts. The prevalence of stroke was high among men compared to women; however, the difference was not significant (p = 0.176). Other factors such as taking routine medication for these chronic conditions, the availability of a caregiver/caretaker, and the number of hours a caretaker spent with the participants were similar for both men and women. Other instrumental activities of daily living such as managing traveling and transportation and finance did not differ significantly between the two sexes (Table 1).

Table 1 Demographic characteristics of the study sample by sex difference
Full size table

Socio-demographic-specific prevalence rates of depression

The prevalence of depression rates estimated for the various socio-demographic factors and independent variables are presented in Table 1. Per the case definitions and cut-off points from the GDS, 172/418 (42.1%) respondents could be identified as “depressed cases”. The prevalence rate was higher in the female participant than in males (46.1% versus 33.6%) and higher among the age group 81 years and above (61.4%). The rate was high among participants with no education (44.7%); single (49.8%); Muslims (41.6%); unemployed (43.5%) and participants in the lower class (51.7%) and the middle class (43.0%).

Other independent variables prevalence rates of depression

The prevalence rate of depression was estimated among participants with certain risk factors versus those without these factors (Table 1). The rate was low among smokers (43.4%); participants who have ever suffered a stroke (41.2%); those taking medications for their chronic conditions (44.2%), those with caretakers/caregivers available with them (38.4%); those with the ability to manage their traveling and transportation (39.3%), and finance (40.5%) compared to their counterparts. Consumers of alcohol (43.3%), participants who have hypertension (47.0%), diabetes (46.2%), other chronic conditions (56.9%), and have their caregiver/care takers spend long hours with them beyond 13 h (44.6%) showed higher depression rates compared to their counterparts.

Predictors of depression

In the univariable analysis, educational status and being diabetic predicted the risk of depression. From the multivariate analysis, variables such as marital status, wealth tercile, other chronic conditions, the ability of participants to manage their travels and transportation, and finance without any aid were statistically significant predictors of depression among our study sample. (Table 2).

Table 2 Factors predicting depression among senior citizens in Greater Kumasi of the Ashanti Region
Full size table

Single participants were [aOR = 1.66; 95% CI = 1.08–2.53] more likely to be depressed compared to their married counterparts. The likelihood of depression decreased as the participant’s economic status increased. Those in the lower class of the wealth tercile were 1.97 times [aOR = 1.97; 95% CI = 1.18–3.27] more likely to experience depression compared to those in the upper class. Also, participants with other chronic conditions were [aOR = 1.86; 95% CI = 0.59–4.62] more likely to be reported as depressed. Two instrumental activities of daily living (IADL) were identified to influence the possibility of depression among the participants. The participant’s ability to manage their traveling and transportation arrangement reduces their chances of being reported as depressed by 44% [aOR = 0.56; 95% CI = 0.32–0.97] compared to those who need assistance to perform that task. Similarly, the ability of participants to manage their finances reduces the likelihood of being depressed by 67% [aOR = 0.33; 95% CI = 0.11–0.97].

Discussion

Increased longevity in the geriatric population is desired in every society, however, ageing comes with its challenges. This stage encompasses a rise in the burden of chronic non-communicable diseases including depression and any attempt to design a support system required the need to understand the burden of depression among older adults. The study found that 2-in-5 of the study sample had some form of depression. Depression was more prevalent in females, of older age (> 81 years), those with no formal education, Muslims, unemployed, single participants, and those within the middle class. The major predictors of depression on multivariable analysis were being single, low class in the wealth tercile, having other chronic conditions, and the inability to manage own affairs (arranging travels, transportation, and finances by self).

The prevalence of depression found in this study was 42.1%. This rate is consistent with the rates reported from other community-based studies conducted in Nigeria (44.7%), Egypt (44.4%), Ethiopia (41.8%), and Sudan (47.5% [32,33,34, 36, 38,39,40, 63]. However, the finding was 4 times higher compared to an earlier rate reported in Ghana, where depression was estimated to be between 6.7 and 13.6% [41, 46, 51]. This variation could be explained by the difference in the operational definitions of depression in both cases and the population dynamics. Our study used the Geriatric Depression Scale whereas the earlier studies conducted in Ghana used the symptoms-based questionnaire and these tools have their unique thresholds for classifying depressed and non-depressed cases [41, 46, 51]. Undoubtedly the Ghanaian population over the past decade has seen significant changes including its size and social structure, and these changes could reflect in their physical, psychological, and mental well-being. Therefore, it is no surprise to see a change in the depression rate after a decade of population dynamics.

Consistently depression was more prevalent among females (46.1%) participants and those advanced in age (81 years and above) similar to studies conducted elsewhere [34, 38, 41,42,43]. For instance, Mulat et al., 2021 [34] and Ofori-Atta et al., 2011 [42] in separate studies reported that women were more likely to become depressed than men and this could be attributed to the inherent vulnerability and gender disadvantage among female population. This disparity could relate to how inequality explains depression among women. The burden of depression was among the octogenarians in this study, and this finding corroborates with evidence from early literature [34, 41]. Old age is usually associated with reduced functionality and other chronic conditions and these health conditions lead to some disabilities which are known to contribute to about 30% of the psychiatric conditions among the aged [6, 15, 17, 18, 64, 65]. Also, the presence of economic loss, dependency on caretakers, and perception about one’s self-worth associated with older age sometimes make life unpleasant for the individual in question which eventually affects their psychological well-being [11]. Even though it is evident that the social support system is protective against developing depression, such support may be well appreciated if it comes from a professional. Most caretakers in the Ghanaian cultural settings are usually young family members who may have to leave their jobs to spend time with the aged, a situation that could heighten the feeling of helplessness in the aged. It is evident that caregivers who spend long hours with the respondents may also experience psychological distress and burnout after a while and tend to abuse their victims, a situation that could heighten the depressive states of those they care for [10] This could explain why our study found a high depression rate among people who spent more hours with a caretaker.

Additionally, the burden of depression was higher among single participants and this finding is consistent with similar studies conducted in India [23], Ethiopia [33], and Uganda [37]. Specifically, single participants were 1.66 times more likely to record depression compared to those in relationships either married or cohabiting. Being married or co-habiting serves as one of the surest ways older adults could provide social support in the form of companionship to each other, whereas single people may lack such support and eventually suffer what Amegbor et al., 2020 in their study termed as social isolation. To Amegbor et al., 2020, this support system protects older adults from the onset of social isolation, loneliness, and eventually depression [13].

The burden of depression was higher among participants with socio-demographic factors such as belonging to the lower class in the community and these findings corroborate with an earlier study in Ghana which reported similar findings [46].

The factors predicting depression in our study included socio-demographic characteristics (marital status and wealth tercile), morbidity (other chronic conditions), and ability to manage one’s finances; manage own traveling and transportation without aid.

Wealth status was protective against depression in our study; the likelihood of being depressed was reduced among participants in higher wealth class and vice versa and this finding is consistent with other studies conducted elsewhere [13, 23, 46, 51]. Our study does not entirely suggest that people in the high-wealth class cannot be depressed, rather their risk is reduced compared to those in the lower class. Generally, the socio-economic status of individuals determines their purchasing power and eventually access to healthcare including mental health support before they develop any problem.

Participants with known other chronic conditions were more likely to suffer from depression compared to their counterparts. This finding is consistent with evidence reported in the literature [12, 23, 45, 46]. The presence of co-morbid conditions in the adult population makes them prone to depression. For instance, a WHO report suggested that the presence of co-morbidities increases an individual’s susceptibility to disabilities which are known to be a major predictor of psychological disorders [9]. Co-morbid conditions such as hypertension, diabetes, and stroke in an older adult usually limits their ability, and increase their disability and dependency on others. The feeling of helplessness in these populations causes them to develop psychological conditions including depression. Also, other chronic conditions such as asthma, arthritis, and backache in the current study were found to have an association with developing depression. Participants with other chronic conditions were almost twice likely to be identified as depressed compared with the latter, this is consistent with another study report from India [23].

In our present study, we found out that, the ability of an individual to manage their own travels and transportation, and financial transactions daily without assistance were protective against being depressed. Participants with the ability to arrange their transportation and travel had a 44% reduced chance of developing depression compared to those who need support. Likewise, those able to handle their finances without help have 67% protection from being depressed. The ability of the older adult to handle some of the basic activities of daily living is an indication of having their cognition intact. It also gives them some sense of hope and belief that they are able, and their lives are still normal. Consistently, evidence from aging reports suggests that reduced functioning among the adult population increases their susceptibility to developing a psychological disorder including depression, and vice versa [6, 11,12,13, 23]. For instance, Chauhan et al., 2016 [23] reported in their study that adults with low scores in the activities of daily living were more depressed than the able ones. Similarly, Mirkena et al., 2018 argued in their study conducted in Ethiopia that adults who were dependent on their children to carry out basic daily activities were three-fold more likely to be depressed compared to the able ones [33].

Limitations of the study

The study was limited in scope, target population, and possible recall bias. The study was limited to the aged population residing in one district without involving the entire region. Additionally, only community dwellers were included leaving out older adults living in institutional homes; a situation that could cause us to miss other depressed victims. Questions assessing wealth terciles, medical history, smoking behavior, and alcohol consumption are considered sensitive issues to discuss in traditional settings, and responses could be subjected to a bias. Nevertheless, adequate scientific scrutiny such as the randomization technique employed, proper community entry, building a good rapport, ensuring confidentiality and privacy during data collection rigorous statistical analysis were employed to reduce these limitations.

Conclusion

Our study revealed that geriatric depression was high which is a public health concern. Marital status, wealth status, the presence of known co-morbid, and other chronic conditions were determining factors for the onset of depression. Also, the ability to perform ones’ basic activities of daily living such as managing own travels, arranging transportation and finance without any aid was protective against developing depression. The study provides data that can inform policy decisions on the care of older adults with depression in Ghana and other similar countries, such as confirming the need to provide support efforts towards high-risk groups such as single people, people with chronic health conditions, and lower-income people. Additionally, the evidence provided in this study could serve as baseline data for larger and longitudinal studies.

Data availability

The dataset used for this study is in the custody of the corresponding author and will be made available upon a reasonable request.

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Funding

This research was supported by the Fogarty International Center and the National Institute on Aging of the National Institutes of Health under Award Number D43 TW 007267-15S1. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health.

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Authors and Affiliations

  1. Department of Epidemiology and Biostatistics, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana

    Emmanuel K. Nakua, John Amissah & Bernard Barnie

  2. Department of Surgery, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana

    Peter Donkor

  3. Department of Medicine, Kwame Nkrumah University of Science and Technology, Kumasi, Ghana

    Phyllis Tawiah

  4. University of Washington, Seattle, USA

    Charles Mock

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Contributions

EKN, JA, PT, PD and CM conceptualize and designed the study. EKN and JA collected and performed the statistical analysis. JA prepared the first draft and it was reviewed by BB, PT, PD and CM. All the co-authors approved the final version of the draft to be published.

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Correspondence to John Amissah.

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The study was reviewed and approved by the Kwame Nkrumah University of Science and Technology Committee for Human Research Publications and Ethics (CHRPE). Additionally, administrative clearance was received from the Asokore Mampong Municipal Health Directorate, and the participants gave either verbal or written consent before enrolling in the study. All identifiable participants’ information, such as contact numbers and household IDs, were de-identified before using for this publication. All procedures were carried out in line with the relevant guidelines and regulations.

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Nakua, E.K., Amissah, J., Tawiah, P. et al. The prevalence and correlates of depression among older adults in greater Kumasi of the Ashanti region. BMC Public Health 23, 763 (2023). https://doi.org/10.1186/s12889-023-15361-z

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