Psychological distress in older adults linked to immigrant status, dietary intake, and physical health conditions in the Canadian Longitudinal Study on Aging (CLSA)

The mediating roles of optimism, loneliness, and psychological distress in the association between a sense of community and meaning in life among older adults

A sense of community is known to be a protective factor for the well-being of older adults and meaning in life associated with positive mental outcomes. Nevertheless, there is a need to expand the knowledge of the role of a sense of community in meaning in life, particularly among older adults. Intending to broaden the empirical understanding from this perspective, the current study examined the mediating roles of optimism, loneliness, and psychological distress in the association between a sense of community and meaning in life. Participants included 740 community dwelling Israeli older adults (M = 71.96; SD = 5.81). Participants completed questionnaires on a sense of community, optimism, loneliness, psychological distress, meaning in life, and sociodemographic characteristics. A positive association was found between a sense of community with optimism, and a negative association with loneliness. A negative association between optimism with psychological distress and a positive link between loneliness with psychological distress was found, while a higher level of psychological distress was associated with a lower level of meaning in life. Practitioners should focus interventions with older adults on developing a sense of community, with the aim to promote optimism and, at the same time, reduce loneliness and thus decrease psychological distress while strengthening meaning in life.

'I thought we would be nourished here': The complexity of nutrition/food and its relationship to mental health among Arab immigrants/refugees in Canada: The CAN-HEAL study

Nutritional psychiatry suggests that diet quality impacts one's mental health (MH). The relationship between food/nutrition and MH may be particularly salient for immigrants/refugees who often experience high risk for household food insecurity and MH challenges. An innovative collaborative community-based participatory research and integrated knowledge translation approach was adopted to explore food/nutrition needs as they relate to MH among Arab immigrants/refuges (AIR) in Ontario, Canada. The goal was to co-identify areas that require social change and co-produce applicable knowledge for service improvement. The CAN-HEAL study used a multi-methodological approach, employing qualitative interviews, photovoice and a questionnaire survey. A combination of three sampling approaches (convenience, snowball and purposive) was used to recruit sixty socio-demographically-diverse adult AIR participants. The research was guided by an integrated bio-psycho-socio-cultural framework. Participants reported various socio-economic and structural barriers to nutritious eating. Food quality/safety was a significant concern and source of anxiety among AIR; food mislabeling, the widespread presence of genetically/chemically modified foods and expired/rotten food products were associated with negative MH. Participants experienced an alarming prevalence of food insecurity (65%), which was associated with negative MH. Intersections among age, gender, religion, socio-economic status, parenthood, disability, and place of residence played a considerable role in how nutrition, food security, and dietary intake impacted AIR's MH and caused substantial disparities within the AIR community. The food/nutrition-MH relationship among AIR is multi-faceted, and various psycho-socio-cultural pathways/processes were found to shape MH. Intersectoral collaboration between health and non-health sectors is needed to implement a co-proposed socio-political and community-level action plan to achieve nutrition and health equity for AIR and other similar marginalized groups.

Healthy Immigrant Effect or Under-Detection? Examining Undiagnosed and Unrecognized Late-Life Depression for Racialized Immigrants and Nonimmigrants in Canada

OBJECTIVES

Immigrants to Canada tend to have a lower incidence of diagnosed depression than nonimmigrants. One theory suggests that this "healthy immigrant effect (HIE)" is due to positive selection. Another school of thought argues that the medical underuse of immigrants may be the underlying reason. This unclear "immigrant paradox" is further confounded by the intersecting race-migration nexus.

METHODS

This population-based study analyzed data of participants (n = 28,951, age ≥45) from the Canadian Community Health Survey (2015-2018). Multivariable logistic regression was employed to examine associations between race-migration nexus and mental health outcomes, including depressive symptoms (Patient Health Questionnaire [PHQ-9] score ≥10).

RESULTS

Compared to Canadian-born (CB) Whites, immigrants, regardless of race, were less likely to receive a mood/anxiety disorder diagnosis (M/A-Dx) by health providers in their lifetime. Racialized immigrants were mentally disadvantaged with increased odds of undiagnosed depression (Adjusted odds ratio [AOR] = 1.76, 99% Confidence interval [CI]:1.30-2.37), whereas White immigrants were mentally healthier with decreased odds of PHQ depression (AOR=0.75, 99%CI: 0.58, 0.96) and poor self-rated mental health (AOR=0.56, 99% CI=0.33, 0.95). Among the subpopulation without a previous M/A-Dx (N = 25,203), racialized immigrants had increased odds of PHQ depression (AOR = 1.45, 99% CI: 1.15-1.82) and unrecognized depression (AOR = 1.47, 99% CI: 1.08-2.00) than CB Whites. Other risk factors for undiagnosed depression include the lack of regular care providers, emergency room as the usual source of care, and being home renters.

DISCUSSION

Despite Canadian universal health coverage, the burden of undiagnosed depression disproportionately affects racialized (but not White) immigrants in mid to late life. Contingent on race-migration nexus, the HIE in mental health may be mainly driven by the healthier profile of White immigrants and partly attributable to the under-detection (by health professionals) and under-recognition of mental health conditions among racialized immigrants. A paradigm shift is needed to estimate late-life depression for medically underserved populations.

Perceived and Experienced Anti-Chinese Discrimination and Its Associated Psychological Impacts Among Chinese Canadians During the Wave 2 of the COVID-19 Pandemic

The current study examined the sociodemographic factors associated with perceived and experienced anti-Chinese discrimination and discrimination as a predictor of psychological distress and loneliness among Chinese Canadians. A cross-sectional online survey was conducted in early 2021 with a sample of 899 Chinese Canadians (i.e., immigrants, citizens, visitors, and international students) during the Wave 2 of the COVID-19 pandemic. Overall, anti-Chinese discrimination was generally associated with younger age and poor financial or health status. Christianity/Catholicism believers were less likely to report perceived discrimination, whereas being married/partnered and living with family reduced the incidences of experienced discrimination. Most importantly, hierarchical linear regression models showed that both perceived and experienced discrimination predicted higher psychological distress (βs = 4.90-7.57, ps ≤ .001) and loneliness (βs = .89-1.73, ps ≤ .003), before and after controlling for all related sociodemographic covariates. Additionally, older age, higher education, better financial or health status could all buffer psychological distress, whereas living with family or in a house and better financial or health status could mitigate feeling of loneliness. The results suggested that discrimination has a robust detrimental impact on mental health conditions among Chinese Canadians.

Parental Self-Efficacy Among Israeli Older Adults

Parental self-efficacy (PSE) is a central aspect of parenting research. Although parenting continues in older ages, few studies have focused on PSE among older adults. In line with the parenting determinant model, the study examined the associations between psychological distress, social support, loneliness, and PSE in older age.The study used a quantitative cross-sectional survey, including 362 Israeli parents age 65 years and above. Participants were asked to complete questionnaires of psychological distress, social support, loneliness, PSE, and background information.Results revealed that higher PSE was associated with lower psychological distress, higher social support, and a lower sense of loneliness in older adults. The research model explained 36.9 per cent of the variance in PSE among older adults.Mental state and social conditions are important for PSE of older adults; therefore, professionals should ensure the availability of diverse solutions to enable, maintain, and promote well-being through social and familial engagement in this population.

The relationship between diet/nutrition and the mental health of immigrants in Western societies through a holistic bio-psycho-socio-cultural lens: A scoping review

Epidemiological evidence suggests that diet and nutrition not only impact individuals' physical health but also shape their mental health (MH). The nutrition/diet-MH relationship may be critical among immigrants due to socioeconomic and sociocultural factors. Despite the complex nutrition/diet-MH relationship, most scholarship in this area employs a biomedical perspective. This scoping review of 63 studies deployed a holistic bio-psycho-socio-cultural framework to examine the relationship between diet/nutrition and immigrants' MH. Five automated databases (Embase, PubMed, Medline, PsycINFO and Anthropology Plus) were systematically searched for relevant articles from Western countries. A bio-psycho-socio-cultural conceptual model guided the analysis of the multi-faceted diet/nutrition-MH relationship. Consumption of fruit/vegetables, unsaturated fats, vitamin D-rich foods and whole grains was significantly positively related to MH. Reported pathways included enhanced self-esteem and ability to stay physically active. Energy-dense food consumption emanating from unhealthful dietary acculturation to the Western lifestyle was associated with poor MH through various mechanisms, including exhaustion and worry about developing non-communicable diseases. Food insecurity and related hunger were significantly positively associated with depression and anxiety among immigrants through different pathways, including family conflicts, homesickness, social exclusion, feelings of shame/stigma, and helplessness related to not affording nutritious foods that meet one's cultural dietary requirements. Ethnic food consumption appeared to mitigate MH issues and enhance immigrants' well-being. A bio-psycho-socio-cultural-informed model is needed to gain an in-depth and encompassing understanding of immigrant MH as it relates to diet/nutrition. The first iteration of such a model is presented in this review alongside an illustration of how it may be used to strengthen an analysis and understanding of the multi-faceted diet/nutrition-MH relationship amongst immigrants and inform public health professionals and dieticians/practitioners.

Meaning in Life among Older Adults: An Integrative Model

Meaning in life (MIL) among older adults has a significant physical and mental health impact. This study aimed to present an integrative model of factors that contribute to variability in MIL among older adults, including background characteristics (gender, age, employment status, religiosity), personality characteristics (locus of control, self-efficacy, optimism), and psycho-social factors (psychological distress and loneliness). Participants (751 older adults, M_age = 72.27, SD = 6.28; 446 female, 305 male) responded to a questionnaire in-person or online. Measures included: demographic variables, Short Scale for the Assessment of Locus of Control, New General Self-Efficacy Scale, Life Orientation Test-Revised, Kessler Psychological Distress Scale, and Hughes Short Scale for Measuring Loneliness. Hierarchical regression revealed that younger and religious older adults reported higher MIL levels than older and non-religious older adults. Internal locus of control, higher self-efficacy, and higher optimism were linked to higher MIL levels. Higher psychological distress and loneliness were associated with lower MIL levels, with psychological distress contributing the most of all variables in the study model to explain the variance in MIL among older adults. Employed older old adults reported lower MIL levels than those unemployed. The study emphasizes the importance of an integrative approach in the examination of MIL among older adults.

Association between lifetime sexual violence victimization and selected health conditions and risk behaviors among 13-24-year-olds in Lesotho: Results from the Violence Against Children and Youth Survey (VACS), 2018

BACKGROUND

Sexual violence is a serious public health concern worldwide. In Lesotho, one in seven women and one in twenty men aged 18 years and older experienced sexual violence during childhood. Sexual violence victimization may lead to long-term mental and physical health issues among victims, regardless of gender.

OBJECTIVE

To estimate the prevalence of lifetime sexual violence victimization (SV) among 13-24-year-olds in Lesotho and assess its association with selected health conditions and risk behaviors.

PARTICIPANTS AND SETTING

Data from 13 to 24-year-old participants (n = 8568) of the 2018 Lesotho Violence Against Children and Youth Survey were analyzed.

METHODS

SV was defined as reporting one or more types of sexual violence at any age. Logistic regression analyses measured associations between SV and selected health conditions (suicidal thoughts, self-harm behaviors, mental distress, STIs, and HIV), and risk behaviors (binge drinking in the past 30 days, drug use in the past 30 days, infrequent condom use in the past 12 months, multiple sex partners in the past 12 months, and transactional sex in the past 12 months).

RESULTS

After controlling for study covariates, SV was significantly associated with self-harm behaviors, suicidal thoughts, ever having an STI, binge drinking in the past 30 days, infrequent condom use in the past 12 months, and multiple sex partners in the past 12 months for both males and females; and mental distress and transactional sex in the past 12 months for females.

CONCLUSIONS

Preventing SV against children and youth in Lesotho may improve their health and wellbeing.

Ageing and Mental Health in Canada: Perspectives from Law, Policy, and Longitudinal Research

Canada is a relatively young, geographically-diverse country, with a larger proportion of the population aged over 65 than under 15. Increasing alongside the number of ageing Canadians is the number of older adults that live with mental health challenges. Across the life course, one in five Canadians will experience a mental health disorder with many more living with subclinical symptoms. For these individuals, their lived experience may be directly impacted by the contemporary laws and policies governing mental illness. Examining and reviewing the historical context of mental health and older adults, we provide insights into the evolving landscape of Canadian mental health law and policy, paternalistic roots in the infancy of the country, into modern foci on equity and diversity. Progressing in parallel to changes in mental health policy has been the advancement of mental health research, particularly through longitudinal studies of ageing. Although acting through different mechanisms, the evolution of Canadian mental health law, policy, and research has had, and continues to have, considerable impacts on the substantial proportion of Canadians living with mental health challenges.

Does Shiftwork Impact Cognitive Performance? Findings from the Canadian Longitudinal Study on Aging (CLSA)

Few large nationwide studies have investigated the relationship between shiftwork and cognitive performance, and little is known about whether and how psychological distress may impact this relationship. This study aimed to examine: (1) the cross-sectional relationship between shiftwork (yes/no) and some aspects of cognitive performance (declarative memory and executive functioning) and (2) the potential moderating effect of psychological distress among 20,610 community-dwelling adults from the comprehensive cohort of the Canadian Longitudinal Study on Aging (CLSA). Differences by sex and retirement status were also explored. Shiftwork was significantly associated with poorer performance for executive functioning (interference condition: ß = 0.47, 95% CI: 0.31 to 0.63; MAT: ß = -0.85, 95% CI: -1.21 to -0.50) but not for declarative memory. Completely and not/partly retired males showed poorer cognitive performance on executive functioning. However, no evidence of a moderating effect by psychological distress was found. Our findings confirm the association between shiftwork and cognitive performance and highlight important health correlates of shiftwork.

Regional Differences in Serious Psychological Distress and Overall Physical and Mental Health

To determine regional differences in the prevalence of overall physical health, overall mental health, and serious psychological distress (SPD). Data from the 2004 to 2016 Medical Expenditure Panel Survey were used for weighted analysis across region. Relationship modifiers considered were sociodemographic factors, health factors, and measures of health expenditures. A higher burden ratio of health care expenditures is negatively associated with health outcomes, across all US regions and insurance. Compared to 2004 values, SPD, overall physical health, and mental health are significantly improved after 2014. This research supports the whole health paradigm, indicating that overall mental and physical health are closely related. The burden of health care costs is an important consideration and related to overall health outcomes, regardless of insurance status or region. These considerations are likely increasingly important to consider with recent global events.

Risk factors of psychological distress during the COVID-19 pandemic: The roles of coping style and emotional regulation

BACKGROUND

When COVID-19 emerged in China in late 2019, most citizens were home-quarantined to prevent the spread of the SARS-CoV-2 virus. Extended periods of isolation have detrimental effects on an individual's mental health. Therefore, the impact of the COVID-19 pandemic should include assessment of psychological distress and its known risk factors, including coping style and emotional regulation.

METHODS

This cross-sectional study surveyed 6,027 Chinese university students recruited from May 25, 2020 to June 10, 2020. In addition to sociodemographic information, participant data were collected using online versions of the 10-item Kessler Psychological Distress Scale (K10), Simplified Coping Style Questionnaire (SCSQ), and Emotion Regulation Questionnaire (ERQ).

RESULTS

The incidence of psychological distress was found to be 35.34%. Negative coping style and expressing panic about COVID-19 on social media were the most important predictors of psychological distress. In addition, being male, being a "left-behind child" or having a monthly household income lower than 5000 CNY or higher than 20,000 CNY were associated with higher psychological distress.

CONCLUSION

The psychological consequences of the COVID-19 pandemic could be serious. Psychological interventions that reduce nervousness and negative coping style need to be made available to home-quarantined university students, especially those who are male, are "left-behind", have a monthly household income lower than 5000 CNY or higher than 20,000 CNY, or express panic on social media.

Individually tailored nutritional guidance improved dietary intake of older family caregivers: a randomized controlled trial

PURPOSE

Older family caregivers (FCs) are vulnerable to insufficient dietary intake and risk of malnutrition. The aim of this study was to assess the impact of individually tailored nutritional guidance on the dietary intake and nutritional status of older FCs and their care recipients' (CRs') nutritional status.

METHODS

This study was a randomized controlled 6-month nutrition intervention in Eastern Finland. The inclusion criteria for FCs were having a home-living CR aged 65 or above and a valid care allowance. The exclusion criterion was CR receiving end-of-life care at baseline. Participants were randomly assigned to an intervention (FCs n = 63, CRs n = 59) and a control (FCs n = 50, CRs n = 48) group. Individually tailored nutritional guidance targeted to FCs was given to an intervention group by a clinical nutritionist. The main outcomes were dietary intake (3-day food record).

RESULTS

After the 6-month intervention, 63 FCs and 59 CRs in the intervention group and 50 FCs and 48 CRs in the control group were analyzed. In the intervention group of FCs, the intakes of protein, riboflavin, calcium, potassium, phosphorus, and iodine differed significantly (p < 0.05) compared to the control group. In addition, the intake of vitamin D supplementation improved in the intervention group of the FCs and CRs (p < 0.001).

CONCLUSION

Individually tailored nutrition guidance improves the intake levels of crucial nutrients, such as the intake levels of protein, vitamin D, and calcium of the FCs. Further studies are warranted to optimize the methods to improve the nutrition of FCs. Registration number of Clinical Trials: ClinicalTrials.gov NCT04003493 (1 July 2019).

Refugee status is associated with double the odds of psychological distress in mid-to-late life: Findings from the Canadian Longitudinal Study on Aging

Psychological distress is associated with a range of negative outcomes including lower quality of life and an increased risk of premature all-cause mortality. The prevalence of, and factors associated with, psychological distress among middle-aged and older Canadians are understudied. Using the Canadian Longitudinal Study on Aging (CLSA) baseline data, this study examined factors associated with psychological distress among adults between 45 and 85 years, including refugee status and a wide range of sociodemographic, health-related and social support characteristics. Psychological distress was measured by Kessler's Psychological Distress Scale-K10 scores. Bivariate and multivariable binary logistic regression analyses were conducted. The prevalence of psychological distress was significantly higher among the 244 refugees (23.8%), compared to 23,149 Canadian-born Canadians (12.8%) and 4,765 non-refugee immigrants (12.6%), despite the fact that the average time the refugees had lived in Canada was more than four decades. The results of the binary logistic regression analysis indicated refugees had twice the age-sex adjusted odds of psychological distress (OR = 2.31, 95% CI: 1.74, 3.07). Even after further adjustment for 16 potential risk factors, a significant relationship remained between refugee status and psychological distress (OR = 1.56; 95% CI = 1.12, 2.17). Other significant factors associated with psychological distress included younger age, female gender, visible minority status, lower household income, not having an undergraduate degree, multimorbidities, chronic pain, and lack of social support. Policies and interventions addressing psychological distress among Canadians in mid- to later life should target refugees and other vulnerable groups.

Post-traumatic stress disorder (PTSD) in mid-age and older adults differs by immigrant status and ethnicity, nutrition, and other determinants of health in the Canadian Longitudinal Study on Aging (CLSA)

PURPOSE

This study aimed to address knowledge gaps about post-traumatic stress disorder (PTSD) in mid-age and older adults, with particular attention to the relationship of PTSD with nutrition and with ethnicity and immigrant status.

METHODS

Binary logistic regression analysis of weighted comprehensive cohort data from the baseline Canadian Longitudinal Study on Aging (CLSA; n = 27,211) was conducted using the four-item Primary Care-PTSD tool (outcome) and immigrant status by ethnicity (Canadian-born white, Canadian-born minority, immigrant white, immigrant minority). Covariates included various social, economic, nutrition and health-related variables.

RESULTS

After controlling for socioeconomic and health variables, immigrants from minority groups had significantly higher odds of PTSD compared to their Canadian-born counterparts, whereas white immigrants had lower odds of PTSD. These relationships were significantly robust across seven cluster-based regression models. After adjusting for ethnicity/immigrant status, the odds of PTSD were higher among those earning lower household incomes, widowed, divorced, or separated respondents, ever smokers, and those who had multi-morbidities, chronic pain, high nutritional risk, or who reported daily consumptions of pastries, pulses and nuts, or chocolate. Conversely, those 55 years and over, who had high waist-to-height ratio, or who consumed 2-3 fiber sources daily had significantly lower odds of PTSD.

CONCLUSION

Interventions aimed at managing PTSD in mid-age and older adults should consider ethnicity, immigrant status, as well as socioeconomic, health, and nutrition status.

A Brief Online Mindfulness-Based Group Intervention for Psychological Distress Among Chinese Residents During COVID-19: a Pilot Randomized Controlled Trial

Objectives

The coronavirus (COVID-19) global pandemic has increased psychological distress among the general population. The objective of this study is to evaluate a mindfulness-based intervention for psychological distress among Chinese residents during COVID-19.

Methods

This study used a switching replications design to test the feasibility and efficacy of a brief online mindfulness-based intervention for Chinese residents’ psychological distress. Fifty-one residents in the Hubei province were randomly allocated to two groups (experimental group and waitlist control group) with three waves of measurement at time 1, time 2, and time 3 for changes in mindfulness and psychological distress.

Results

In addition to significant within-group improvements over time for both groups, OLS linear regression with full information likelihood estimation revealed statistically significant between-group treatment effects across outcome domains, including mindfulness awareness, b = 2.84, p < 0.001, g = 6.92, psychological distress, b = −21.33, p < 0.001, g = 6.62, somatic symptoms, b = −6.22, p < 0.001, g = 4.42, depressive symptoms, b = −7.16, p < 0.001, g = 5.07, and anxiety symptoms, b = −8.09, p < 0.001, g = 6.84.

Conclusions

Results suggest that a brief online mindfulness-based intervention can be a feasible and promising intervention for improving mindfulness and decreasing psychological distress among Chinese residents staying at home during the COVID-19 outbreak. The study used a small convenience sample which led to a concern of external generalizability and with limited evaluation of long-term change.

Identifying the impact of social networks on mental and emotional health seeking behaviours amongst women who are refugees from Syria living in Canada

Between 2015 and 2017, over 24,000 Syrian women came to Canada as refugees. Refugees are two to three times more likely than native Canadians to suffer from depression and other mental health challenges. A qualitative approach was taken to understand roles of social networks in shaping the mental and emotional health resource-seeking behaviours of twelve Syrian women who are refugees. Semi-structured telephone interviews were conducted in both English and Arabic. Interviews were audio-recorded, transcribed, and thematically coded using NVivo 12. Findings reveal that (1) families play large roles in teaching and providing information about Canada's health system, including mental health services; (2) Social networks influence assumptions about mental and physical health services; (3) women feel more welcomed into social networks in Canada than in countries of first asylum; and (4) social networks act as alternatives to seeking formal mental and emotional health care. Through first-hand stories and experiences of Syrian women's transitions into Canada, this study identifies the ways in which social networks may help or hinder engagement with mental and emotional health services.

Nutritional Factors, Physical Health and Immigrant Status Are Associated with Anxiety Disorders among Middle-Aged and Older Adults: Findings from Baseline Data of The Canadian Longitudinal Study on Aging (CLSA)

The main purpose of this study was to compare the lifetime prevalence of anxiety disorders among foreign-born and Canadian-born adults in middle and later life. Using baseline data of the Canadian Longitudinal Study on Aging (2010–2015), multivariable binary logistic regression was conducted to investigate anxiety diagnosis and immigrant status, while controlling for socio-economic, health-related, and nutrition covariates. Of 26,991 participants (49.3% men, 82.5% Canadian born, 58.5% aged 45–65 years), the overall prevalence of self-reported physician diagnosis of anxiety disorders was 8.5%, with immigrants being lower than Canadian-born respondents (6.4% vs. 9.3%, p < 0.001). After accounting for all covariates, the adjusted odds ratio (aOR) for anxiety disorders was lower among immigrants (aOR = 0.77, 95% CI: 0.67–0.88) compared to those who were Canadian born. Identified risk factors included: younger age (aORs = 1.79–3.52), being a woman (aOR = 1.25, 95% CI: 1.07–1.46), single status (aOR = 1.27, 95% CI: 1.09–1.48), lower income (aORs = 1.28–2.68), multi-morbidities (aORs = 2.73–5.13), chronic pain (aOR = 1.31, 95% CI: 1.18–1.44), lifetime smoking ≥ 100 cigarettes (aOR = 1.35, 95% CI: 1.23–1.48), BMI < 18.5 (aOR = 1.87, 95% CI: 1.20–2.92), body fat ≥ 26% (aORs = 1.28–1.79), fruit and vegetable intake (<3/day; aORs = 1.24–1.26), and pastry consumption (>1/day; aOR = 1.55, 95% CI: 1.12–1.15) (p < 0.05). Targeting socio-economic and nutritional risk factors may reduce the burden of anxiety disorders in middle and late adulthood.

Nutrition, Immigration and Health Determinants Are Linked to Verbal Fluency among Anglophone Adults in the Canadian Longitudinal Study on Aging (CLSA)

OBJECTIVES

Later-life cognitive impairment is an important health issue; however, little is known about the condition among diverse groups such as immigrants. This study aims to examine whether the healthy immigrant effect exists for verbal fluency, an indicator of cognitive functioning, among anglophone middle-aged and older adults in Canada.

METHODS

Using from the baseline data of the Canadian Longitudinal Study on Aging (CLSA), multiple linear regression was employed to compare associations among immigrants (recent and long-term) and Canadian-born residents without dementia for two verbal fluency tests, the Controlled Oral Word Association Test (COWAT) and the Animal Fluency (AF) task. Covariates included socioeconomic, physical health, and dietary intake.

RESULTS

Of 8,574 anglophone participants (85.7% Canada-born, 74.8% aged 45-65 years, 81.8% married, 81.9% with a post-secondary degree), long-term immigrants (settled in Canada >20 years) performed significantly better than Canadian-born residents for the COWAT (42.8 vs 40.9) but not the AF task (22.4 vs 22.4). Results of the multivariable adjusted regression analyses showed that long-term immigrants performed better than Canadian-born peers in both the COWAT (B=1.57, 95% CI: 0.80-2.34) and the AF test (B=0.57, 95% CI: 0.19-0.95), but this advantage was not observed among recent immigrants. Other factors associated with low verbal fluency performance included being single, socioeconomically disadvantaged, having hypertension, excess body fat, and consuming low amounts of pulses/nuts or fruit/vegetables.

CONCLUSIONS

Long-term immigrants had higher verbal fluency test scores than their Canadian-born counterparts. Immigration status, social, health and nutritional factors are important considerations for possible intervention and prevention strategies for cognitive impairment.