Cognitive function and discontinuation of adjuvant hormonal therapy in older breast cancer survivors: CALGB 369901 (Alliance).

Published

Journal Article

PURPOSE:To investigate the effects of cognitive function on discontinuation of hormonal therapy in breast cancer survivors ages 65+ ("older"). METHODS:Older breast cancer survivors with invasive, non-metastatic disease, and no reported cognitive difficulties were recruited from 78 Alliance sites between 2004 and 2011. Eligible survivors (n = 1280) completed baseline interviews; follow-up was conducted annually for up to 7 years. Survivors with estrogen-receptor-positive (ER+) cancers who initiated hormonal therapy (n = 990) were included. Self-reported cognitive function was measured using the EORTC-QLQ30 scale; a difference of eight points on the 0-100 scale was considered clinically significant. Based on varying rates of discontinuation over time, discontinuation was evaluated separately for three time periods: early (<1 year); midpoint (1-3 years); and late discontinuation (>3-5 years). Cox models for each time period were used to evaluate the effects of cognition immediately preceding discontinuation, controlling for age, chemotherapy, and other covariates. RESULTS:Survivors were 65-91 years old (mean 72.6 years), and 79% had stages 1 or 2A disease. Overall, 43% discontinued hormonal therapy before 5 years. Survivors who reported lower cognitive function in the period before discontinuation had greater hazards of discontinuing therapy at the treatment midpoint (HR 1.22 per 8-point difference, CI 1.09-1.40, p < 0.001), considering covariates, but cognition was not related to discontinuation in the other periods. CONCLUSIONS:Self-reported cognitive problems were a significant risk factor for discontinuation of hormonal therapy 1-3 years post-initiation. Additional research is needed on the temporality of cognitive effects and hormonal therapy to support survivorship care needs of older survivors.

Full Text

Duke Authors

Cited Authors

  • Bluethmann, SM; Alfano, CM; Clapp, JD; Luta, G; Small, BJ; Hurria, A; Cohen, HJ; Sugarman, S; B Muss, H; Isaacs, C; Mandelblatt, JS

Published Date

  • October 2017

Published In

Volume / Issue

  • 165 / 3

Start / End Page

  • 677 - 686

PubMed ID

  • 28653250

Pubmed Central ID

  • 28653250

Electronic International Standard Serial Number (EISSN)

  • 1573-7217

International Standard Serial Number (ISSN)

  • 0167-6806

Digital Object Identifier (DOI)

  • 10.1007/s10549-017-4353-y

Language

  • eng