Understanding ageing: fear of chronic diseases later in life

Abstract

Objectives

Ageing is often associated with deteriorating mental and physical health and the need for long-term care, creating a fear of ageing. We investigated what people fear most in terms of disabling chronic diseases and their concerns regarding having long-term illnesses.

Methods

Data were obtained from an online survey of 518 respondents aged 40 years and older residing in Malaysia, which was based on a convenience sample collected in May 2015 to January 2016. Data were analyzed using chi-squared tests and multinomial logistic regression.

Results

Of the most dreaded diseases, heart disease and cancer are life-threatening; however, dementia, diabetes, and hypertension persist and have a disabling effect for a long time. While there were variations in the diseases feared most across sex, ethnicity, and place of residence, the biggest worry for all respondents with regard to having a long-term illness was that they would become a burden to their family, a concern that superseded fear of dying.

Conclusions

We found our survey respondents had a fear of chronic diseases and placing a burden on others. Thus, there is a need to provide motivation for people to adopt a healthy lifestyle, to remain healthy.

Keywords

Ageing fear disabling diseases burden to family dying multinomial logistic regression

Introduction

As much as people wish to stay youthful and no matter to what lengths they will go to remain young, some degree of depressing thoughts about ageing linger in the minds of most people. Mental and physical decline, losing loved ones, not being able to financially support oneself or loved ones, and becoming a burden or dependent on family members and friends are some of the reasons people fear getting old. The perceptions, experiences, and interpretations of an individual’s own ageing process contribute to the development of a fear of ageing.¹ The ageing self as a concept of an individual's ageing process can be explained in relation to their social cultural background, social experiences, and socioeconomic conditions.^2–3 Ageing is a process that is related to but distinct from each individual's concept of physical self, social self, personal identity,¹ personal experience, attitude towards ageing, and age stereotypes.^4–6 The experience of the passing of time is fundamental to the human condition, and how one perceives living well throughout old age is highly subjective.^7,8

Ageing is often associated with poor health and particularly the onset and progression of chronic illness such as cancer, Alzheimer's disease, diabetes, arthritis, and heart disease. Ageing can entail multiple losses, including the loss of work (through retirement) and physical functioning.⁹ There have been considerable studies on psychosocial gerontology examining how individuals retain and reshape their self concept as they age. However, the concepts of the ageing self and one's personal sense of ageing as well as how much importance one places on the signs of ageing, its attributes, and the inevitability of physical decline that comes with ageing are relatively new.^10–13

According to a 2015 World Health Organization (WHO)¹⁴ fact sheet, cancer is the disease feared most by the majority of people. There were approximately 14 million new cases of cancer and 8.2 million cancer-related deaths in 2012. Cognitive impairment and dementia is another health concern expressed by older individuals. Attitudes towards this illness, such as fears of memory loss, losing independence, and burdening family members and society are deeply embedded in people's cultural biographies and life experiences.^15–17 Alzheimer's disease, the most prevalent type of dementia,¹⁸ is known not only for its negative effect on the quality of life of patients and caregivers but also for the stigma surrounding it, which is attributable to a lack of understanding of the disease.^19–23 The World Alzheimer Report (2015) estimates that 46.8 million people currently live with dementia worldwide. More than 9.9 million new cases are recorded annually and these numbers are projected to increase to 74.7 million by 2030 and 131.5 million by 2050; people living in Asia will account for nearly half of these cases.

The 2015 WHO fact sheet¹⁴ also reported that cardiovascular disease (CVD) remains the leading cause of death globally. An estimated 17.5 million people died from CVDs in 2012, which represents 31% of deaths globally. At the same time, the number of people with diabetes rose from 108 million in 1980 to 422 million in 2014. Approximately 1.5 million deaths in 2012 were directly associated with diabetic conditions. Older people with diabetes have considerable functional impairments that lead to reduced health status and reduced health-related mental and physical quality of life.^24,25. There is also a general perception that musculoskeletal conditions such as low back pain and osteoarthritis are “old person's diseases” and that the burden of disease is an inevitable consequence of ageing that entails physical impairment and having to live with pain.^26–29

Aside from being life-threatening, chronic illnesses tend to persist and have disabling effects that require long-term care, the consequences of which may include of relatives and friends, causing burnout among caregivers, financial distress, and job modifications.^30–33

Negative attitudes towards older adults are predicted by personal anxieties about ageing and death, as reported by Depaola et al. (2003).³⁴ Death anxiety can form a basic fear underlying certain psychological conditions and is a uniquely human dilemma that can consciously or unconsciously impact a person’s everyday life domains and functioning.³⁵ Anxiety about death can be influenced by how individuals are able to see themselves from a true perspective; this in turn affects one’s ability to see dying in a positive or negative light.³⁶ Studies show that fear of death is positively related to low self-esteem, feeling that one has little purpose in life, and poor mental well-being; a fear of death is negatively related to happiness.^37–39 Young people generally have negative perceptions of elderly adults and tend to view ageing as a negative process that involves depression, stress, regrets, weight gain, becoming less active, and mid-life crisis.^40,41 In contrast, older people have either a positive or a negative view of ageing. Generally older adults view ageing as being accompanied by both losses (physical and social) and by gains, such as more freedom and time for new interests and social activities.^42–44

This research aimed to investigate how Malaysians generally view ageing and the fears and attitudes relating to disease and long-term illness that are perceived as being part of the ageing process. In particular, we were interested to find what are the most feared disabling diseases and long-term illnesses. Alongside people’s fears lie their expectations and their needs for support, which give rise to social and policy implications.

Materials and methods

This paper is based on data collected from a convenience sample of 518 respondents aged 40 years and above, using an online self-administered survey conducted in Malaysia (excluding non-Malaysians) in May 2015 to January 2016. Convenience sampling was used owing to the lack of a sampling frame. However, efforts were made to include different segments of the population so as to have a good representation of the population in the country. Under simple random sampling, a sample size of around 500 respondents would produce a margin of error of around 4.5% for estimating proportion (assuming P = 0.5). Together with obtaining information on sociodemographic background, respondents were asked about their most feared disabling diseases in later life, their fears regarding having long-term illness, and their opinions on various dimensions of ageing. Close-ended questions were used that contained a list of possible responses. Descriptive statistics were generated to explore the distribution of respondents across the variables of interest. Chi-squared tests and multinomial logistic regression were performed to test for significant associations between the dependent and independent variables.

Results

Respondents’ demographic and employment profiles

Table 1 shows the basic demographic characteristics of respondents. The sex ratio was 45:55. A high proportion of respondents were younger than 60 (84.5%) years of age, of which 47% were aged 40–49 years. In terms of ethnicity, about 66% of respondents were Malay, 21% were Chinese, and 5.6% were Indians. The ethnic composition of the sample corresponds closely to that of the total population of Malaysia. For purposes of analysis, Indian and other ethnic groups were combined into one group. A little more than 70% of respondents were from urban areas.

Table 1.

Respondents’ demographic profile.

Demographics	Frequency	Percent
Total	518	100.0
Sex
Male	233	45.0
Female	285	55.0
Age (years)
40–49	243	47.1
50–59	193	37.4
60–69	80	15.5
Ethnicity
Malay	340	65.6
Chinese	108	20.9
Indian & Other	70	13.5
Locality
Urban	367	71.0
Rural	150	29.0

Most respondents had ever worked, with about 44% currently working in the public sector, 25% in the private sector, and about 12% were self-employed. Nearly 6% of respondents were fully retired whereas 5% were retired but continued to work. The data suggest that about 61% of respondents were in professional or management positions (Table 2).

Table 2.

Respondents’ employment status.

Employment	Frequency	Percent
Total	518	100.0
Ever Worked
Yes	494	95.4
No	24	4.6
Employment status
Working in public sector	226	43.6
Working in private sector	130	25.1
Self-employed	61	11.8
Retired from public or private sector	29	5.6
Retired and continues to work	25	4.8
Not working	47	9.1
Employment Category
Professional or management	312	60.5
Other	206	39.5

Fears of deteriorating health and contracting diseases

In this survey, respondents were asked to state the one disease they feared most. The three most feared disabling diseases were cancer (37.3%), Alzheimer's disease (22.5%), and heart attack or heart disease (19.2%) (Table 3). A sizable proportion identified diabetes (10.6%) as their most dreaded disease followed by arthritis (3.7%), stroke (1.7%), and hypertension (0.9%). The remaining 4% responded with the category of “Other”; however, these respondents did not specify the disease. Owing to the small number of responses for arthritis, stroke, hypertension, and other diseases, these were combined for the analysis.

Table 3.

Most feared disabling disease later in life.

Disease	Frequency	Percent
Cancer	193	37.3
Alzheimer's disease	117	22.5
Heart attack/disease	99	19.2
Diabetes	55	10.6
Arthritis	19	3.7
Stroke	9	1.7
Hypertension	5	0.9
Other	21	4.1
Total	518	100.0

The proportion of respondents who reported fearing cancer and Alzheimer disease was significantly higher among women than men whereas the opposite was true for a fear of heart attack or heart disease and diabetes (Table 4). Significant differences in the fear of disabling diseases were also observed across ethnic groups and locality. The number of respondents who reported fearing cancer and heart disease was highest among Malays, followed by Indian and Chinese respondents. However, the number of Chinese respondents who expressed fear of contracting Alzheimer's disease was nearly double that of Malays. A higher proportion of rural respondents said they feared cancer, heart disease, and diabetes compared with urban respondents, but the opposite was true for fear of Alzheimer's disease. The most feared disabling diseases later in life were not significantly associated with age and employment status or category (Table 4). It should be noted that for employment status, working in the public or private sector were combined and categorized as employed; retired or not working were categorized as not employed.

Table 4.

Associations between most feared disabling disease and selected variables.

Variable	Cancer	Alzheimer disease	Heart attack/ disease	Diabetes	Arthritis/ other	P-value
Sex
Male	79 (33.9)	45 (19.3)	59 (25.3)	28 (12.0)	22 (9.4)	0.01
Female	114 (40.0)	72 (25.3)	40 (14.0)	27 (9.5)	32 (11.2)
Age group
40–49 years	91 (37.4)	52 (21.4)	51 (21.0)	27 (11.1)	22 (9.1)	0.31
50–59 years	69 (35.8)	49 (25.4)	32 (16.6)	16 (8.3)	27 (14.0)
60+ years	32 (40.0)	15 (18.8)	16 (20.0)	12 (15.0)	5 (6.2)
Ethnicity
Malay	131 (38.5)	64 (18.8)	80 (23.5)	35 (10.3)	30 (8.8)	0.00
Chinese	37 (34.3)	38 (35.2)	10 (9.3)	7 (6.5)	16 (14.8)
Indian/Other	25 (35.7)	15 (21.4)	9 (12.9)	13 (18.6)	8 (11.4)
Locality
Urban	130 (35.4)	100 (27.2)	67 (18.3)	30 (8.2)	40 (10.9)	0.00
Rural	62 (41.3)	17 (11.3)	32 (21.3)	25 (16.7)	14 (9.3)
Employment status
Employed	142 (37.3)	88 (23.1)	73 (19.2)	38 (10.0)	40 (10.5)	0.09
Self-employed	20 (32.8)	12 (19.7)	13 (21.3)	8 (13.1)	8 (13.1)
Not employed	31 (40.8)	17 (22.4)	13 (17.1)	9 (11.8)	6 (7.9)
Employment category
Professional/management	124 (39.7)	76 (24.4)	53 (17.0)	26 (8.3)	33 (10.6)	0.95
Other	69 (33.5)	41 (19.9)	46 (22.3)	29 (14.1)	21 (10.2)

Note: Reported as frequency (percent).

Multinomial logistic regression was performed for the most feared diseases. Results of the significant odds ratios are shown in Table 5. Compared with women, men were significantly more likely to fear heart attack/disease over arthritis (adjusted odds ratio (AOR) 2.422, 95% confidence interval (CI) 1.195–4.909), cancer (AOR 2.360, 95% CI 1.403–3.970), and Alzheimer disease (AOR 2.950, 95% CI 1.637–5.314). Malays were significantly more likely than Indians or other ethnic groups to fear heart attack/disease compared with arthritis/other diseases (AOR 3.174, 95% CI 1.084–9.297), Alzheimer's disease (AOR 2.803, 95% CI 1.106–7.104), and diabetes (AOR 3.301, 95% CI 1.250-8.716). Urban respondents were significantly more likely than their rural counterparts to fear Alzheimer's disease over cancer, heart attack/disease, and diabetes whereas respondents with professional jobs were significantly less likely to fear heart attack/disease compared with cancer.

Table 5.

Multinomial logistic regression of most feared disabling diseases.

	Variable	AOR	95% CI	P-value
Heart attack/disease vs. arthritis/others	Sex
	Male	2.422	1.195–4.909	0.014
	Female	(reference)
	Ethnicity
	Malay	3.174	1.084–9.297	0.035
	Chinese	0.749	0.206–2.731	0.662
	Indian/Other	(reference)
Alzheimer's disease vs. cancer	Locality
	Urban	3.244	1.627–6.467	0.001
	Rural	(reference)
Heart attack/disease vs. cancer	Sex
	Male	2.360	1.403–3.970	0.001
	Female	(reference)
	Current Employment
	Professional	0.466	0.258–0.843	0.012
	Other	(reference)
Heart attack/disease vs. Alzheimer's disease	Sex
	Male	2.950	1.637–5.314	0.000
	Female	(reference)
	Locality
	Urban	0.403	0.185–0.876	0.022
	Rural	(reference)
	Ethnicity
	Malay	2.803	1.106–7.104	0.030
	Chinese	0.691	0.223–2.144	0.522
	Indian/Other	(reference)
Diabetes vs. Alzheimer's disease	Locality
	Urban	0.232	0.097–0.555	0.001
	Rural	(reference)
Heart attack/disease vs. diabetes	Ethnicity
	Malay	3.301	1.250–8.716	0.016
	Chinese	1.754	0.461–6.677	0.410
	Indian/Other	(reference)

Abbreviations: AOR, adjusted odds ratio; CI, confidence interval.

Fears regarding having long-term illness

Respondents were asked what they feared most in relation to having a long-term illness. About 66% of respondents feared being a burden to their family, followed by a fear of exhausting their savings (13.7%), dying (9.5%), and ending up in a nursing home (6.0%). The category of “Other” included fear of medical treatment cost, losing independence, and not being able to live a meaningful and dignified life (Table 6).

Table 6.

Fears regarding having a long-term illness.

Type of Fear	Frequency	Percent
Being a burden to family	340	65.6
Using up savings	71	13.7
Dying	49	9.5
Ending up in a nursing home	31	6.0
Other	27	5.2
Total	518	100.0

The fear of having a long-term illness was examined across the various sociodemographic variables (Table 7). The proportion of respondents who feared being a burden to their family was higher among women than men, higher among Chinese respondents than Malays or Indians, and higher among urban respondents than rural ones; this fear decreased with increasing age. However, none of these associations were statistically significant. There was little difference in fears regarding long-term illness across age groups and employment status.

Table 7.

Fear of having a long-term illness, by socioeconomic variable.

Variable	Being a burden to family*	Using up savings*	Dying*	Ending up in a nursing home/Other*	P-value
Sex
Male	146 (62.7)	32 (13.7)	24 (10.3)	31 (13.3)	0.46
Female	194 (68.1)	39 (13.7)	25 (8.8)	27 (9.5)
Age group
40–49 years	164 (67.5)	32 (13.2)	23 (9.5)	24 (9.9)	0.96
50–59 years	124 (64.2)	28 (14.5)	17 (8.8)	24 (12.4)
60+ years	50 (62.5)	11 (13.8)	9 (11.2)	10 (12.5)
Ethnicity
Malay	222 (65.3)	44 (12.9)	37 (10.9)	37 (10.9)	0.67
Chinese	73 (67.6)	14 (13.0)	7 (6.5)	14 (13.0)
Indian/Other	45 (64.3)	13 (18.6)	5 (7.1)	7 (10.0)
Area
Urban	254 (69.2)	47 (12.8)	28 (7.6)	38 (10.4)	0.03
Rural	85 (56.7)	24 (16.0)	21 (14.0)	20 (13.3)
Employment category (current/previous)
Professional	215 (68.9)	40 (12.8)	27 (8.7)	30 (9.6)	0.26
Others	125 (60.7)	31 (15.0)	22 (10.7)	28 (13.6)
Current employment status
Employed	259 (68.0)	55 (14.4)	31 (8.1)	36 (9.4)	0.13
Self-employed	35 (57.4)	6 (9.8)	10 (16.4)	10 (16.4)
Not employed	46 (60.5)	10 (13.2)	8 (10.5)	12 (15.8)

Note: Reported as frequency (percent).

Discussion

The population of Malaysia is ageing rapidly, and the country will be a super-aged nation around 2035 when the proportion of people aged 60 years and over exceeds 15% of the total population. Population ageing poses great challenges to existing models of caregiving and social support. Ageing is inevitably associated with a deterioration in health and the increased need for physical, financial, and emotional support, which affect the well-being of the individuals themselves and that of their families. In this study, we focused on the perceptions of people towards ageing, in terms of their fears of contracting a disabling chronic disease requiring long-term care. Among our findings, we found that the fear of burdening family even superseded the fear of dying.

A study using data of the 2004 Malaysian Population and Family Survey⁴⁵ showed that arthritis is the most common noncommunicable disease among older Malaysians (45.3%), followed by high blood pressure or hypertension (35.8%), diabetes (14.1%), asthma (13.2%), and coronary heart disease (8.0%). However, in this study, arthritis was only ranked fifth in terms of the most feared disease, and hypertension was hardly mentioned as a dreaded illness. Instead, the most feared disabling diseases reported were cancer, followed by Alzheimer's disease, heart attack or heart disease, and diabetes. Cancer and heart disease are feared because of the severe pain that is usually involved and the fact that patients tend to die within a relatively short period. By contrast, Alzheimer disease and diabetes tend to persist, with accompanying disability, for a much longer time. WHO reports and previous studies show that these are common illnesses associated with people going through the ageing process, especially Alzheimer's disease and arthritis.^15,24,26,27

Significant differences were found with respect to the fear of contracting these diseases according to sex, place of residence, and ethnicity. These differences could be attributable to personal life experiences and exposure within respondents’ own social circles. Men and Malays were more likely to fear heart attack or disease over diseases. Urban respondents were more likely to fear heart attack or disease over Alzheimer's disease compared with cancer or diabetes. With regard to coping with a long-term illness, respondents expressed more concern and fear over becoming a burden to family, followed by the fear of exhausting their savings and fear of dying. This finding is consistent with those of Lynn and Adamson (2002), Chappell and Reid (2002), and Almberg et al. (1997).^28,30,31 These fears arise from the fact that having a chronic disease or long-term illness requires long-term care, which leads to the need for caregiving and adds a financial burden. The fear of chronic disease and the realization that the debilitating effects of these diseases can place a heavy burden on families and caregivers should provide sufficient motivation for people to adopt a healthy lifestyle and to remain healthy. In addition, health education and awareness campaigns should be regularly carried out to promote healthy living, especially with respect to food consumption, stress management, and physical activity. There is also a need to dispel the myths of some traditional beliefs with regard to health and health care later in life.

Conclusions

Much as people wish to stay youthful and healthy, there is always lingering fear about old age and especially of diseases that may come with age. The fear of chronic diseases is often accompanied by the knowledge that the debilitating effects of these diseases can be psychologically distressing and can place a heavy burden on families and caregivers. These fears, as well as greater awareness of the causes and consequences of chronic diseases, could motivate people to adopt a healthy lifestyle and to remain healthy. Health education should be stepped up and be accorded top priority in education and health care systems.

Footnotes

Acknowledgements

This research was internally funded by Social Security Research Centre (SSRC), University of Malaya.

Declaration of conflicting interests

The authors declare that there is no conflict of interest.

Funding

This research received no specific grant from any funding agency in the public, commercial, or not-for-profit sectors.

References

Westerhof

Whitbourne

Freeman

. The ageing self in a cultural context: The relation of conceptions of ageing to identity processes and self-esteem in the United States and the Netherlands. J Gerontol B Psychol Sci Soc Sci 2012; 67: 52–60.

Westerhof GJ and Tulle E. Meanings of ageing and old age: discursive contexts, social attitudes and personal identities. Ageing Soc 2007; 235–254.

Diehl

Wahl

Barrett

et al.

Awareness of ageing: theoretical considerations on an emerging concept. Dev Rev 2014; 34: 93–113.

Hess

Hinson

. Age-related variation in the influences of ageing stereotypes on memory in adulthood. Psychol Ageing 2006; 21: 621–621.

Levy

. Mind matters: Cognitive and physical effects of ageing self-stereotypes. J Gerontol B Psychol Sci Soc Sci 2003; 58: 203–211.

Levy

. Stereotype embodiment a psychosocial approach to ageing. Curr Dir Psychol Sci 2009; 18: 332–336.

Miche

Wahl

Diehl

et al.

Natural occurrence of subjective ageing experiences in community-dwelling older adults. J Gerontol B Psychol Sci Soc Sci 2014; 69: 174–187.

Nosraty

Jylhä

Raittila

et al.

Perceptions by the oldest old of successful aging, vitality 90+ Study. J Aging Stud 2015; 32: 50–58.

Phillips

Ferguson

. Self-compassion: a resource for positive ageing. J Gerontol B Psychol Sci Soc Sci 2013; 68: 529–539.

10.

Diehl

Wahl

. Awareness of age-related change: examination of a (mostly) unexplored concept. J Gerontol B Psychol Sci Soc Sci 2010; 65B: 340–350.

11.

Levy

Ashman

Slade

. Age attributions and ageing health: contrast between the United States and Japan. J Gerontol B Psychol Sci Soc Sci 2009; 64: 335–338.

12.

Clarke

Korotchenko

. ‘I know it exists… but I haven't experienced it personally’: older Canadian men's perceptions of ageism as a distant social problem. Ageing Soc 2016; 36: 1757–1773.

13.

Bennett

Clarke

Kowalski

et al.

“I’ll do anything to maintain my health”: How women aged 65–94 perceive, experience, and cope with their aging bodies. Body Image 2017; 21: 71–80.

14.

World Health Organization fact sheet, 2015 http://www.who.int/mediacentre/factsheets/fs297/en/.

15.

Laditka

Liu

et al.

Older adults' concerns about cognitive health: commonalities and differences among six United States ethnic groups. Ageing Soc 2011; 31: 1202–1228.

16.

Corner

Bond

. Being at risk of dementia: fears and anxieties of older adults. J Aging Stud 2004; 18: 143–155.

17.

Laditka

Liu

et al.

How do older people describe others with cognitive impairment? A multiethnic study in the United States. Ageing Soc 2013; 33: 369–392.

18.

The American Heritage Medical Dictionary http://www.yourdictionary.com/about/the-american-heritage-medical-dictionary.html.

19.

Jolley

Benbow

. Stigma and Alzheimer's disease: causes, consequences and a constructive approach. Int J Clin Pract 2000; 54: 117–119.

20.

Jolley

Benbow

Grizzell

. Memory clinics. Postgrad Med J 2006; 82: 199–206.

21.

Cipriani

Borin

. Understanding dementia in the sociocultural context: a review. Int J Soc Psychiatry 2015; 61: 198–204.

22.

Abojabel H and Werner P. Exploring family stigma among caregivers of persons with Alzheimer's disease: the experiences of Israeli-Arab caregivers. Dementia (London) 2016; 1471301216673920.

23.

Lee Casado

Lee

Hong

et al.

The experience of family caregivers of older Korean Americans with dementia symptoms. Clin Gerontol 2015; 38: 32–48.

24.

Sinclair

Conroy

Bayer

. Impact of diabetes on physical function in older people. Diabetes Care 2008; 31: 233–235.

25.

Hayes

Arima

Woodward

et al.

Changes in quality of life associated with complications of diabetes: results from the ADVANCE study. Value Health 2016; 19: 36–41.

26.

Gibbs

. Men and chronic arthritis: does age make men more likely to use self-management services? Generations 2008; 32: 78–81.

27.

Appelt

Burant

CJ.

Siminoff

et al.

Arthritis-specific health beliefs related to ageing among older male patients with knee and/or hip osteoarthritis. J Gerontol A Biol Sci Med Sci 2007; 62: 184–190.

28.

Lynn J and Adamson DM. Living well at the end of life. Adapting health care to serious chronic illness in old age. RAND Corporation, Santa Monica, CA; 2003.

29.

Prince

Guo

et al.

The burden of disease in older people and implications for health policy and practice. Lancet 2015; 385: 549–562.

30.

Chappell

Reid

. Burden and well-being among caregivers: examining the distinction. Gerontologist 2002; 42: 772–780.

31.

Almberg

Grafström

Winblad

. Caring for a demented elderly person—burden and burnout among caregiving relatives. J Adv Nurs 1997; 25: 109–116.

32.

Whitney

White

Gleiss

et al.

A novel method for determining post-release mortality, behavior, and recovery period using acceleration data loggers. Fish Res 2016; 183: 210–221.

33.

Nipp

Powell

Chabner

et al.

Recognizing the financial burden of cancer patients in clinical trials. Oncologist 2015; 20: 572–575.

34.

Depaola

Griffin

Young

et al.

Death anxiety and attitudes toward the elderly among older adults: The Role of gender and ethnicity. Death Stud 2003; 27: 335–354.

35.

Iverach

Menzies

. Death anxiety and its role in psychopathology: Reviewing the status of a transdiagnostic construct. Clin Psychol Rev 2014; 34: 580–593.

36.

Kesebir

. A quiet ego quiets death anxiety: Humility as an existential anxiety buffer. J Pers Soc Psychol 2014; 106: 610–610.

37.

Missler

Stroebe

Geurtsen

et al.

Exploring death anxiety among elderly people: A literature review and empirical investigation. Omega-J Death Dying 2012; 64: 357–379.

38.

Azaiza

Ron

Shoham

et al.

Death and dying anxiety among elderly Arab Muslims in Israel. Death Stud 2010; 34: 351–364.

39.

Gesser

Wong

Reker

. Death attitudes across the life-span: the development and validation of the Death Attitude Profile (DAP). Omega-J Death Dying 1988; 18: 113–128.

40.

Phoenix

Griffin

. Narratives at work: What can stories of older athletes do. Ageing Soc 2013; 33: 243–266.

41.

Lucacel

Baban

. Young peoples' perspective regarding aging. Cognitie, Creier, Comportament/Cognition, Brain, Behavior 2014; 18: 151–161.

42.

Wurm

Tesch-Römer

Tomasik

. Longitudinal findings on ageing-related cognitions, control beliefs, and health in later life. J Gerontol B Psychol Sci Soc Sci 2007; 62: 156–164.

43.

Froidevaux A and Hirschi A. 23 Managing the transition to retirement: from meaningful work to meaning in life at retirement. Handbook of Research on Sustainable Careers 2015; 350.

44.

Huxhold

Miche

Schüz

. Benefits of having friends in older ages: Differential effects of informal social activities on well-being in middle-aged and older adults. J Gerontol B Psychol Sci Soc Sci 2014; 69: 366–375.

45.

Teh

JKL

Tey

. Ethnic and gender differentials in non-communicable diseases and self-rated health in Malaysia. PLoS ONE 2014; 9: e91328–e91328. doi:10.1371/journal.pone.0091328.