Support roles, carer burden, and decision-making preferences of carers of older adults with cancer.

Introduction: Older adults with cancer value the perspectives of significant others and their carers regarding decision-making about treatment. Understanding the support provided by carers, and their perspectives on involvement in treatment decision-making, can help us improve our communication with patients and their supports. We aimed to describe the roles, burden, and decision-making preferences of carers of older adults with cancer.
Materials and Methods: We performed a cross-sectional survey of carers of older adults (≥65y) with cancer at three centres in Sydney, Australia. Type, frequency, and perspectives on providing care were evaluated using Likert scales. Preferred and perceived role in treatment decision-making by modified Control Preferences Scale, and carer burden by Zarit Burden Index (ZBI-12), were evaluated. Preferred role in decision-making and carer burden were compared between groups (culturally and linguistically diverse backgrounds [CALD], sex, and carer age ≥ 65) by chi-squared or t-tests.
Results: One-hundred and fourteen returned surveys were included (23 partially completed). Carer characteristics: median age 55y (range 24-90), female (74 %), child (49 %) and spouse (35 %) of the care-recipient. Care-recipient characteristics: median age 75y (range 65-96), receiving anti-cancer treatment (85 %), and CALD background (44 %). Carers were frequently involved in communication and information gathering (45 % -80 %) and supported instrumental activities of daily living (IADLs) (43 % - 81 %) more frequently than basic activities of daily living (ADLs) (2-13 %). Most (91 %) preferred to be present when treatment options were discussed. Their preferred role in treatment decision-making was passive in 66 %, collaborative in 30 %, and active in 4 %, with most (72 %) playing their preferred role. The preferred role was associated with carer age (p = 0.01) and CALD background (p = 0.04), with younger (<65y) carers and those caring for CALD older adults preferring a more passive role. Carer burden was 'low' in 29 %, 'moderate' in 31 %, and 'high' in 39 %, and providing psychological support was rated most challenging.
Discussion: Carers of older adults with cancer play varied support roles, particularly in communication and information gathering. Carers prefer to be present for discussions about treatment options, though favour a passive role in treatment decision-making, upholding patient autonomy. Understanding the communication preferences of carers is an important consideration when supporting the patient in deciding treatment options and direction of care.
Competing Interests: Declaration of Competing Interest The authors have no conflicts of interest to declare.
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