Longitudinal race/ethnicity (R/E) specific trends in patient-reported outcomes (PRO) in elderly women with breast cancer (BC) in the SEER-MHOS database.

Abstract

e23189 Background: PRO can be used to characterize health-related quality of life in cancer survivors; however, few studies have reported on longitudinal trends. Hence, we examined R/E specific (White/Black/Hispanic) longitudinal trends in physical and mental PRO for elderly women with BC. Methods: Data is from the Surveillance, Epidemiology, and End Results- Medicare Health Outcomes Survey (SEER-MHOS). The analytic sample (n = 33,386) included 25,267 White, 4,553 Black, and 3,566 Hispanic women newly diagnosed between 2010-2017 with 10 years of follow-up survey data. Generalized linear models with age/time-stratified predictive margins [means with 95% confidence intervals (CI)] were used to examine age/body mass index-adjusted physical and mental health PRO by R/E as physical and mental component summary t-scores [PCS/MCS: are linear transformation of the 0-100 possible range scoring for 8 Veterans RAND 12 Item Health Survey (VR-12) sub-scales, with mean of 50 and standard deviation (SD) of 10, normed to the US population]. Results: Overall PRO trends for all R/E groups were observed to decrease (i.e., worsen) over the 10 year period, however, trends remained highest for Whites and lowest for Hispanics [average Black/White Risk Difference (RD) (PCS: -3.2; -3.7, -2.8), (MCS: -3.4; -3.8, -2.9); average Hispanic/White RD: (PCS -3.3; -3.8, -2.8), (MCS: -5.4; -5.8, -4.9)]. Compared with White, Black and Hispanic women aged 45 years at diagnosis had significantly worse PRO at 10 years of follow-up [PCS: (White: 39.7; 38.2, 41.2), (Black: 33.7; 29.6, 37.9), (Hispanic: 31.4; 26.7, 36.1); MCS: (White: 47.1; 45.6, 48.5), (Black: 41.2; 37.2, 45.2), (Hispanic: 35.4; 30.8, 38.9)]. Similar disparity in R/E trends was also observed at older age strata (i.e., 55, 65, 75 and 85). For PCS the R/E disparity was no longer significant after 8 years follow-up for age strata 55, 65, and 75, and after 4 years for age strata 85. But for MCS the R/E disparity remained significant up to 8 years follow-up for age strata 55, 65, 75, and 85. With regards to VR-12 sub-scale examination, most of the PCS R/E disparity was likely due to differences in the general-health score; whereas for MCS disparity, it was likely due to differences in social-functioning, role-limitation, and emotional-well-being. Conclusions: Our findings show durable R/E specific disparities in longitudinal physical and mental PRO trends in elderly women with BC; this should inform strategies to optimize healthy aging for BC survivors.