- Research article
- Open Access
Time to move? Factors associated with burden of care among informal caregivers of cognitively impaired older people facing housing decisions: secondary analysis of a cluster randomized trial
BMC Geriatrics volume 19, Article number: 249 (2019)
- The Correction to this article has been published in BMC Geriatrics 2020 20:42
Making health-related decisions about loved ones with cognitive impairment may contribute to caregiver burden of care. We sought to explore factors associated with burden of care among informal caregivers who had made housing decisions on behalf of a cognitively impaired older person.
We conducted a secondary analysis within a cluster randomized trial (cRT) conducted in 16 publicly-funded home care service points across the Province of Quebec. The cRT assessed the impact of training home care teams in interprofessional shared decision making (IP-SDM). We assessed burden of care with the Zarit Burden Interview (ZBI) scale. We adapted Pallett’s framework to inform our data analysis. This framework posits that factors influencing burden of care among caregivers fall within four domains: (a) characteristics of the caregiver, (b) characteristics of the cognitively impaired older person, (c) characteristics of the relationship between the caregiver and the cognitively impaired older person, and (d) the caregiver’s perception of their social support resources. We computed the ZBI score and performed multilevel linear regression modelling.
Among 296 caregivers included in the dataset, the mean ZBI score was 29.8 (SD = 17.5) out of 88. The typical participant was 62.6 years old (SD = 11.7), female (74.7%), and caring for a mother or father (61.2%). Using multivariate analysis, factors significantly associated with caregiver burden mapped onto: caregiver characteristics (caregivers with higher burden were female, experienced higher decision regret and decisional conflict, preferred that their loved one move into the caregiver’s home, into a private nursing home or a mixed private-public nursing home, and had made the decision more recently); relationship characteristics (spouses and children experienced higher burden); and caregiver’s perception of social support resources (caregivers who perceived that a joint decision making process had occurred had higher burden).
In line with the proposed framework used, we found that caregiver characteristics, relationship characteristics and caregiver’s perception of social support resources were associated with burden of care. Our results will help design interventions to prevent and/or reduce caregivers’ burden of care.
NCT02244359. Date of registration: September 18, 2014.
Projections made in 2017 estimate that the world population aged 60 or above will more than double and the population aged over 80 will triple by 2050 . Most very old people (85+) are still living at home, mostly because they want to [2,3,4,5]. However, all older people, wherever they are living, eventually have difficulty remaining independent and require assistance. Loss of autonomy among older people is commonly compensated by spouses and children [6, 7]. When the older person is cognitively impaired, formal caregivers (e.g. home care personnel) and/or informal caregivers (e.g. a family member) are often involved in decision-making about their health [8, 9]. These informal caregivers have a crucial role in ensuring the quality of life of cognitively impaired older people and in decisions related to their health. This role may entail financial burden, social isolation, and physical and/or mental health problems, referred to as “burden of care” .
When it is no longer possible to receive the care they need at home, cognitively impaired older people (and their caregivers) face a decision about staying at home or moving to a long-term care facility . Although cognitively impaired people may benefit from participating in the decision-making process , caregivers often have to make the final decision on behalf of their loved one. For caregivers, making this housing decision on behalf of a cognitively impaired older person can be one of the most stressful situations . Caregivers need decision support but this is not often available from healthcare professionals and caregivers frequently feel abandoned or unrecognized by the healthcare system [14, 15].
Many studies on burden of care among caregivers of people with cognitive impairment inform us about the health of caregivers. Indeed, caregiver health can affect the quality of the care they are providing and the decisions they make for the person in their care [16, 17]. Caregiver burden itself is associated with institutionalization of the care recipient, worsening of their behavioral and psychological symptoms of dementia, elder abuse, deterioration of cognition and mood, deterioration of quality of life and function, malnutrition and feeding difficulties, and increased healthcare utilization and cost of care . Some studies have explored factors contributing to caregiver burden, such as characteristics of the caregivers, their preferences and values, and support available for them [9, 11, 19, 20]. In terms of housing decisions, some studies have explored caregivers’ contribution to the decision to move a cognitively impaired older person out of his/her own home [6, 9, 15]. Others have shown that this decision can increase burden of care for caregivers [9, 11, 21]. But few studies have explored risk factors for burden of care among caregivers making this decision.
Study design and setting
We performed a secondary analysis of data collected between March 2015 and September 2016 in 16 distinct communities in the Province of Quebec, Canada, for a two-arm cluster randomized trial (cRT) . This cRT assessed the impact of training home-care teams based in community health and social services centres (HSSCs) in interprofessional shared decision making (IP-SDM) on the role that caregivers assume in the decision-making process regarding housing for a cognitively impaired older person. The intervention arm received training in IP-SDM (including the use of a decision-making guide ) while the control arm continued to provide usual care. The published study protocol provides complete details . Below we summarize the methods relevant to this sub-analysis. We chose to treat the whole dataset as a cross-sectional study and exposure to the intervention was treated as an independent variable at the level of the cluster, namely the HSSC.
Participants of the primary study were a) HSSCs located in both urban and rural settings in the Province of Quebec, b) home care teams (one per HSSC), and c) informal caregivers of a cognitively impaired older person. A detailed description of the HSSC recruitment process is available elsewhere . The 16 recruited HSSCs were mostly rural (67.7%) . Caregivers were recruited consecutively if they were: i) involved in making a housing decision (in the months following the intervention) on behalf of a cognitively impaired person aged 65 years or older who was receiving services from an interprofessional home care team participating in the study; and ii) able to read, understand and write French or English. Therefore all caregivers from both the intervention and control groups were included in this secondary analysis, representing a total of 296 caregivers of cognitively impaired older persons receiving care from interprofessional home care teams in the participating HSSCs.
After obtaining the caregiver’s written informed consent, a trained research assistant completed the study questionnaire with the caregiver in a place chosen by the participant (either in a public place, such as a café, or in the caregiver’s home). Participation of the caregiver was cross-sectional, i.e. there was only one data collection point for each participant. In total, 27 variables were available in the dataset of the parent study. Our approach to selecting the independent variables from this dataset was informed by Pallett’s (1990) conceptual framework for assessing caregivers’ burden of care in Alzheimer’s dementia . This framework posits that factors affecting burden of care fall under four broad domains a) characteristics of the caregiver (e.g., sociodemographics, values and preferences about the healthcare of the older person, health and emotional condition); b) characteristics of the cognitively impaired older person (e.g., cognitive impairment, behavior problems, values and preferences about their healthcare, and type and amount of care required); c) characteristics of the relationship between the caregiver and the cognitively impaired older person (e.g., quality and relationship type); and d) the caregiver’s perception of available social support resources (e.g., social networks, family relationships, and support from healthcare professionals). Variables within each domain may act either to induce caregiver burden of care, or to protect the caregiver against it. We adapted Pallett’s framework to our context of caregivers who had made housing decisions on behalf of a cognitively impaired older person and mapped our dependent and independent variables onto its four domains to ensure our secondary analysis was theory informed.
Caregiver burden of care
Our dependent variable was assessed using the Zarit Burden Interview (ZBI) scale . The ZBI is a validated scale consisting of 22 items, each of which is measured on a five-point Likert scale (0 = never, to 4 = nearly always) and a total score ranging from 0 (no burden) to 88 (severe burden) [10, 26,27,28]. Internal consistency of the scale is good to excellent (Cronbach alpha correlation coefficients range from 0.85 to 0.93) [26, 29]. The test-retest reliability is high (intra-class correlation coefficient 0.89) [26, 29].
Decisional conflict, or personal uncertainty about the course of action to take when the choices involve risk, loss, regret, or a challenge to personal life values, was measured with the 16-item Decisional Conflict Scale (DCS) [32, 33]. This scale also captures factors contributing to uncertainty, such as feeling uninformed, being unclear about personal values, feeling unsupported and perception of making an effective decision. Scores range from 0 (no decisional conflict) to 100 (high decisional conflict).
The caregiver’s perception of the role they assumed in decision-making was measured using a modified version of the Control Preferences Scale, a single question that assesses perception of locus of control over decision-making [34, 35]. Response options are: A) I made the decision, B) I made the decision after considering the healthcare professionals’ opinions, C) The healthcare professionals and I shared the responsibility for the decision-making, D) The healthcare professionals made the decision after considering my opinion, E) The healthcare professionals made the decision. Based on previous work in this field, we dichotomized these into an active role (A, B, C) or a passive role (D and E) .
The caregiver’s perception that a joint decision-making process had occurred with a member or members of the home care team was measured using the Dyadic Observing Patient Involvement in Decision Making instrument (D-OPTION) [36, 37]. This 12-item instrument assesses the caregiver’s perception that a joint decision-making process occurred and the final score ranges from 0 (decision-making not joint) to 100 (decision-making joint).
Caregivers’ perceptions of healthcare professionals’ SDM behaviors during the decision-making process was measured with the 9-item Shared Decision Making Questionnaire (SDMQ-9) rated on a 6-point scale . The score ranges from 0 to 100, where 0 is the absence of any SDM behaviors and 100 indicates the presence of all nine.
Mapping the independent variables
Of the 27 independent variables available in our dataset, we mapped 21 onto Pallett’s conceptual framework. The six other variables related to the fidelity of the intervention and we not appropriate for our analysis.
Characteristics of the caregiver
We mapped 13 variables onto this domain, including sociodemographic characteristics (age, sex, education level, total family income, civil status, and employment status) as well as two variables relating to the caregiver’s values and preferences. The latter were what role he/she wished to play in the decision-making process (preferred role), and his/her housing preference for the cognitively impaired older person (stay home, move in with caregiver, move to private or public nursing home or another option). This domain also included decisional conflict (DCS) and decision regret about the actual decision made (DRS). Variables relating to the caregiver’s emotional reaction to the decisional process and its evolution with time were also included in this domain. We also mapped the number of days that had elapsed between when the caregiver made the decision and when they completed the questionnaire. The main RCT used post-intervention measures, so caregivers made the decision after their home care team had received the intervention. The questionnaires were administered once the home care teams had identified caregivers who had made a decision since the intervention, so the time lapse varied between the decision and the questionnaire (we refer to this henceforth as “time lapse since the decision.”) The season when the housing decision had to be made, and the season when the caregiver entered the study were mapped onto this domain because they could influence the caregiver’s emotional reaction which in turn could influence burden of care . Quebec has extreme weather conditions, varying from very hot in summer (> 30 C) to extremely cold in winter (< 30 C) and this may influence their perception of the built environment as being adequate or not during these conditions.
Characteristics of the cognitively impaired older person
We mapped two variables regarding the housing decision onto this domain: the cognitively impaired person’s housing preference, according to the caregiver, and the actual housing decision made, i.e. where the cognitively impaired older person would live in the future.
Characteristics of the relationship between the caregiver and the cognitively impaired older person
We mapped one variable onto this domain: the relationship type between caregiver and the cognitively impaired older person, i.e. if they were taking care of a spouse, a mother or father, a friend, another family member, or other.
The caregiver’s perception of available social support resources
We mapped four variables onto this domain. Three of them informed us about the extent to which caregivers felt engaged and supported in their decision: the caregiver’s perception of the role he or she had assumed in the decision-making process, i.e. passive or active (Control Preferences Scale); the caregiver’s perception that a joint decision-making process with a home care team member had occurred (D-OPTION); and caregivers’ perceptions of healthcare professionals’ SDM behaviors during the decision-making process (SDMQ-9). Although related, these three measures capture distinct concepts. The fourth variable we mapped onto this domain was whether the caregiver was part of the intervention group or the control arm in the main study, i.e. whether or not their home care team had received (been exposed to) the IP-SDM intervention . Finally, we noted whether the HSSC was in a rural or urban setting.
We calculated percentages, means and standard deviations to describe the population of caregivers. All variables had less than 1% missing values. For missing values, we imputed by the individual mean imputation method or using a strongly correlated variable when possible. We imputed the value of the scores by the mean of the subject’s complete responses to other items . We categorized the DRS score to facilitate interpretation because of the high percentage score of 0. Based on results of a systematic review of 59 studies reporting on decision regret, we recoded it as: “no regret” (DRS score < 5), “mild regret” (5 ≤ DRS score ≤ 25) and “moderate to strong regret” (DRS score ≥ 30) .
First, we explored potential independent variables associated with ZBI by performing unadjusted analyses using two-level simple regression (HSSCs and caregivers), including the HSSCs as a random effect at the level of the intercept in order to account for the intra-class correlation induced by the HSSCs. Before running the multivariate model, we tested possible mediators in order to identify potential variables involved in the same causal path thereby avoiding their simultaneous inclusion in the multivariate analysis. The multiple regression model included all potential associated variables identified with the four domains of the adapted Pallett’s framework as described above. We built a final parsimonious theory-informed model by including all predictors retained by a backward selection procedure with p ≤ 0.05 as the stopping rule. When results between the bivariate and multivariate estimates were inconsistent, we tested possible interactions between independent variables. In all analyses, we verified model assumptions such as normality and homoscedasticity of residuals. We estimated the intra-class correlation coefficients (ICC) for the two-level unadjusted model. For a sample size of 296 caregivers, the estimated power of our analysis was 86% considering a two-level multiple regression analysis with 16 clusters, an ICC of 0.1 and a moderate effect size of 0.15. The analyses were performed using R version 3.4.3.
Caregiver burden of care
All 296 caregivers included in the parent study were included in our analysis. On average, caregivers’ ZBI mean ± standard deviation score (SD) was 29.8 ± 17.5 out of 88. The results of the ZBI score ranged from 0 to a maximum of 81. ICC for the ZBI was 0.13 (Table 1).
Characteristics of the informal caregiver
Mean age of caregivers was 62.6 ± 11.7 years, 74.7% were female, 50.3% were retired, and the highest level of formal education for 45.6% of caregivers was secondary school (Table 1). Close to half (43.2%) preferred that the cognitively impaired older person stay at home, and 43.6% preferred they move to a nursing home. Most caregivers experienced no decision regret (57.8%), 27.0% felt mild decision regret and 15.2% moderate to high decision regret. Mean DCS score was 23.3 ± 17.6 (scores of ≥25/100 are clinically significant ). Time lapse since the decision was 142.6 ± 104.9 days.
Characteristics of the cognitively impaired older person
The preference of 62.2% of the cognitively impaired older people, according to their caregivers, was to stay at home. Regarding the housing decision eventually made, 63.8% moved to a private or public nursing home, 14.5% stayed in their home, 3.4% moved into the caregiver’s home, and 18.2% moved to another location, such as a mixed private-public nursing home.
Characteristics of the relationship between the caregiver and the cognitively impaired older person
Caregivers were mostly children (61.2%) or spouses (22.3%) of the cognitively impaired older person.
The caregivers’ perception of available social support resources
A total of 73.5% of caregivers said they were active in decision making. The mean score of the caregiver’s perception of the occurrence of a joint decision-making process with a home care team member (D-OPTION) was 63.8 ± 20.6 out of 100. The mean score of the caregivers’ perceptions of healthcare professionals’ SDM behaviors during the decision-making process (SDMQ-9) was 64.9 ± 25.3 out of 100. Finally, 46.6% of caregivers were receiving services from a team who had received SDM training.
The following variables were found to be significantly associated with caregiver burden of care (Table 2): education level, caregiver’s preferred role in the decision-making process, decision regret, decisional conflict, the time lapse since the decision was made, relationship type between caregivers and the cognitively impaired older person, and the caregiver’s perception that a joint decision making process with a home care team member had occurred. Two other variables, sex and the caregiver’s housing preference for the cognitively impaired older person were narrowly statistically significant.
Overall, our final model explained 39% of the total variance of the dependent variable, with the cluster (HSSC) explaining 13% alone (Table 3). At the level of the caregiver, the following variables were significantly associated with caregiver burden: sex (women were more likely to experience higher burden), caregiver’s housing preference for the cognitively impaired older person (preference that the person move into their own home, into a private nursing home or a mixed private-public intermediate facility was associated with more burden), decision regret (more decision regret was associated with more burden), decisional conflict (more decisional conflict was associated with more burden), time lapse since the decision was made (more time was associated with less burden), relationship type (being a spouse of the person cared for was associated with more burden), and caregivers’ perception of a joint decision making process (i.e., regardless of what the caregiver’s preferred role was, the more they perceived that a joint decision making process had occurred, the higher the burden of care was). In this analysis, none of the factors in the domain of the cognitively impaired person’s characteristics remained significantly associated with higher burden of care.
Our study evaluated factors associated with burden of care among caregivers who had made housing decisions on behalf of a cognitively impaired older person. We observed that the domains proposed by our adapted conceptual framework explained a significant proportion of the variance of burden of care, thus providing further evidence to validate the framework. We found six risk factors for higher burden of care and one for lower burden of care. These results lead us to make three main observations.
First, our mean score of caregiver burden was slightly lower than in a set of five other studies on burden of care among caregivers of cognitively impaired older people [41,42,43,44,45]. Our study population was receiving services from interprofessional home care teams and may have been experiencing less burden because of this support. Also, given that some of them had experienced the housing decision at least 3 months before the data collection, it is possible that our participating caregivers had time to find various strategies to alleviate their burden of care . However, other results in our sample are congruent with other studies: caregivers were mostly female, in their mid-sixties, and taking care of a mother or father [7, 15].
Second, we observed that most of the factors associated with burden of care were congruent with findings of other studies in this field. For example, we observed that women experienced more caregiver burden than men, and spouses more than children of the cognitively impaired older person. Women, especially spouses and daughters, generally take on the role of caregivers [6, 8]. Indeed, for gendered cultural reasons, many women believe they are responsible for caring because of their sex. Female spouses may in addition believe that caring is part of their duty as a partner [14, 17] and as they have often cared more directly for children they have more experience of home care than men [46, 47]. Taking care of a mother/father was associated with significant caregiver burden, a result which has been found elsewhere . Children of a cognitively impaired older person may have less experience in caregiving, which may increase the difficulty of their caregiving responsibilities [6, 7, 17]. Also, they are more likely to be trying to balance the demands of caring for parents, caring for their own children, and working full-time, and they may feel that they can’t give enough time to caring [6, 7, 17]. Our observation about decision regret and decisional conflict being associated with higher burden of care was also congruent with the literature [9, 14, 19]. Caregivers want to honor the preference of their loved one  and if the caregiver’s choice is not consistent with the preference of the cognitively impaired older person, it increases decision regret and decisional conflict, which in turn appears to increase the general burden on the caregiver .
Third, we found new factors associated with burden of care that have not yet been observed in the literature. Burden of care was higher when a caregiver’s housing preference was a private nursing home, a mixed private-public nursing home, or having the cognitively impaired person move into their own home (compared to them moving into a public, nursing home). In Quebec, private nursing homes are certified by the government but managed by private interests. Public nursing homes are managed by the state and free for eligible citizens. Mixed private/public nursing homes are private nursing homes contracted by the state to provide services for eligible residents. This higher burden of care can probably be explained by the apprehension of the high cost of sustaining a family member in a private nursing home for the rest of their life, and perhaps at a great distance from their own home, or the difficulty and upheaval of looking after a cognitively impaired person at home [6, 15]. Also, our results show that the more time that had elapsed after the decision, the less burden the caregiver experienced. Few SDM studies have considered the effects of decision-making over the long-term, beyond the immediate consequences . In the short term, this difficult decision may be an emotional burden , and caregiver burden does not always end after institutionalization. With time, however, the caregiver may experience the institutionalization of their cognitively impaired relative as a relief . The perception that they are receiving better care than before may also be the best reassurance for caregivers that they made the best decision and therefore decreases their burden of care . Also, as reported by previous decision making research, people are generally bad at forecasting, so caregivers’ worst fears may have been unfounded . Our results also showed that the more a caregiver perceived that a joint decision-making process had occurred with the home care team, the higher their burden of care was. This is in contrast with previous work that showed that sharing decisions with healthcare professionals may facilitate the decision-making process and decreases caregiver burden [9, 11, 14]. However, involvement in a housing decision for a loved one may also result in emotional stress due to the need to understand and process complex information . This may undermine a surrogate’s ability to make decisions that protect their loved one’s interests and promote their preferences. In addition, some caregivers may prefer not take the responsibility for a decision that might require they go against the preferences and values of their loved one or indeed their own desires . Some caregivers might also find it stressful and intimidating to partake in a collective decision-making process with a team of professionals . Interestingly, two related variables, caregiver’s assumed role and caregiver’s perception of healthcare professional’s SDM behaviors, were not kept in the final model, suggesting that these three concept, (joint process, assumed role and perception of the health professional’s SDM behaviors) and their respective measures are clearly distinct.
Our study has limitations. First, this is a secondary data analysis of an earlier cRT, which did not collect data on all of the concepts in Pallett’s domains. While Pallett’s framework describes many of the factors associated with burden of care in our context, it included numerous additional factors that were not in our dataset, such as the cognitively impaired older person’s diseases and behavioral problems and the quality of the relationship between the caregiver and the cognitively impaired older person [7, 15, 17, 20]. However, the framework provided important theoretical support which resulted in a final model that successfully explained significant variance in burden of care. Second, a selection bias may have contributed to our underestimating of caregiver burden. Caregivers with too heavy a burden may have been unwilling to participate in the study because they were overwhelmed by their responsibilities. Finally, we did not measure the time elapsed since the older person had actually moved (only the time elapsed since the decision), and so we cannot affirm with certainty that the time elapsed since the decision corresponded exactly to the time elapsed since they moved.
We found that burden of care in caregivers who had made housing decisions on behalf of a cognitively impaired older person was higher if caregivers were female, experienced higher decision regret and decisional conflict, and were caring for a parent. These variables map on to three of Pallet’s proposed four domains. We also found new risk factors for higher burden of care: caregivers preferring that their loved one move into their own home or into a private or mixed public/private nursing home (as opposed to a public nursing home); having experienced a joint decision-making process; and a shorter lapse of time since the decision was made.
We are unaware of any evidence-based interventions that specifically address the risk factors for burden of care identified in this paper. However, our team has developed training for home care teams in interprofessional decision-making with caregivers and their loved ones and this study challenges and informs our intervention . Home care teams may be trained to identify those caregivers at higher risk of burden of care (e.g. older women facing a housing decision for a cognitively impaired parent without decision-making support) and offer adapted support services, such as psychoeducation or cognitive behavioral therapy . Caregivers themselves could also be given strategies for reducing burden of care when making decisions about housing for their relatives. Even if they do not want to participate in the process, if they feel more supported this may reduce their burden [9, 11, 14].
Availability of data and materials
The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.
Cluster randomized trial
Decisional Conflict Scale
Dyadic Observing Patient Involvement in Decision Making instrument
Decision Regret Scale
health and social services center
Intra-class correlation coefficients
Interprofessional shared decision making
Shared decision making
the 9-item Shared Decision Making Questionnaire
Zarit Burden Interview Scale
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We are grateful to all caregivers and the interprofessional home-care teams who participated in our study and to the health professionals for their collaboration. We thank our caregiver partner Henriette Bourassa (HB) for sharing her experience with us and advising us on this manuscript. We also thank Louisa Blair for her editorial support.
This research is funded by CFN (Canadian Frailty Network), which is supported by the Government of Canada through the Networks of Centres of Excellence (NCE) program, by the Ministère de la Santé et des Services sociaux (MSSS) du Québec and by the Agence de la Santé et des Services sociaux de la Capitale Nationale. We also have the support of the following local health networks: the Consortium InterESt Santé, the CSSS du Rocher Percé and the CSSS de la Vieille Capitale. The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; or the decision to submit the manuscript for publication.
Ethics approval and consent to participate
All participants gave written informed consent. Ethics committee review approval was obtained from the CHU de Québec Multicentre Ethics Committee (approval number: MP-CHU-QC-14-001; registration number: NCT02244359; date of registration: September 18, 2014).
Consent for publication
All participants had to sign a consent form allowing the utilization and publication of their data.
The authors declare that they have no competing interests.
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Boucher, A., Haesebaert, J., Freitas, A. et al. Time to move? Factors associated with burden of care among informal caregivers of cognitively impaired older people facing housing decisions: secondary analysis of a cluster randomized trial. BMC Geriatr 19, 249 (2019). https://doi.org/10.1186/s12877-019-1249-1
- Burden of care
- Cognitively impaired older persons
- Housing decisions
- Shared decision making
- Secondary analysis