Understanding health outcome preferences of older adults diagnosed with multiple myeloma.

INTRODUCTION

Health outcome preferences of older adults with cancer vary based on burden/intensity of treatment and its impact on health outcomes such as survival, quality of life, and functional and cognitive well-being. We studied the association between age and health outcome preferences of adults with multiple myeloma (MM).

MATERIALS AND METHODS

Using a single center prospective cohort study, we identified adults ≥50y with MM who underwent geriatric assessment (GA) within 30 days of initiating a new line of therapy. We assessed health outcome preferences using a nine-item health outcome preference scale where patients were asked to prioritize varying treatment outcomes in a Likert scale. We compared the response patterns for each item by age group (50-69y vs ≥70y) using Mantel-Haenszel chi-squared test. For items significant in bi-variable analysis, we built proportional odds models to study the association between age and health outcome preferences adjusting for sex, race, frailty, and high risk cytogenetics.

RESULTS

We included 119 patients with a median age of 65y. Of these, 58% were male, 56% were non-Hispanic White, and 28% were frail. Older adults (≥70y) versus younger adults (50-69y) were more likely to prioritize health outcomes such as quality of life (53% vs. 34%), functional independence (74% vs. 33%), maintaining cognitive ability (79% vs. 54%), and living free from pain (50% vs 18%) over longer survival (all p values <0.05). In multivariable models, each one interquartile range (IQR) increase in age was associated with increased odds of prioritization of functional independence [adjusted odds ratio (aOR) 2.55, 95% confidence interval (CI) (1.44-4.53)], maintaining cognitive ability [aOR 1.75, 95% CI (1.01-3.02)], and willingness to take milder/ fewer treatments [aOR 2.40, 95% CI (1.36-4.26)] over longer survival. Similarly, each IQR increase in age was associated with decreased odds of prioritization of survival over quality of life [aOR 0.45, 95% CI (0.26-0.78)] and survival over being free from pain [aOR 0.39, 95% CI (0.22-0.69)].

DISCUSSION

Three out of four older adults (age ≥ 70y) with MM rated other outcomes, particularly functional and cognitive well-being, above survival. Determining the most significant treatment outcomes for older adults with MM can aid in establishing treatment goals and enhance shared decision-making.