Abstract
Purpose
Proton pump inhibitors (PPIs) are used in cancer patients to manage treatment-related gastrointestinal symptoms and to prevent damage to the gastric mucosal lining during treatment. However, PPI use may contribute to cognitive problems. To compare PPI-users and non-users, breast cancer survivors reported cognitive problems in three studies.
Methods
In Study 1, breast cancer survivors (N = 209; n = 173 non-users, n = 36 PPI-users; stages 0-IIIC) rated their cognitive function on the Kohli scale prior to cancer treatment, as well as one and two years later. In Study 2, women (N = 200; n = 169 non-users, n = 31 PPI-users, stages 0-IIIa, M = 11 months post-treatment) rated their cognitive function on the Kohli scale and BCPT checklist at three visits over a six-month period. In Study 3, participants (N = 142; n = 121 non-users, n = 21 PPI-users; stages I-IIIa, M = 4 years post-treatment) rated their cognitive function on the Kohli scale, BCPT checklist, and Functional Assessment of Cancer Therapy cognitive scale (FACT-cog).
Results
In Study 1, PPI-users reported more severe concentration problems (p = 0.039) but not memory problems (p = 0.17) than non-users. In Study 2, PPI-users reported more severe concentration problems (p = 0.022) than non-users, but not memory problems or symptoms on the BCPT (ps = 0.11). Study 3’s PPI-users reported more severe memory problems (p = 0.002), poorer overall cognitive function (p = 0.006), lower quality of life related to cognitive problems (p = 0.005), greater perceived cognitive impairment (p = 0.013), and poorer cognitive abilities (p = 0.046), but not more severe concentration problems (p = 0.16), compared to non-users.
Conclusions/implications
PPI use may impair breast cancer survivors’ memory, concentration, and quality of life.
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Abbreviations
- PPI:
-
Proton Pump Inhibitor
- BCPT:
-
Breast Cancer Prevention Trial
- FACT-cog:
-
Functional Assessment of Cancer Therapy cognitive scale
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Funding
This study was supported in part by NIH grants: R01 CA186251, R01 CA126857, R01 CA131029, R01 CA186720, K05 CA172296, UL1RR025755, and T32 DE014320.
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Madison, A.A., Woody, A., Bailey, B. et al. Cognitive problems of breast cancer survivors on proton pump inhibitors. J Cancer Surviv 14, 226–234 (2020). https://doi.org/10.1007/s11764-019-00815-4
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DOI: https://doi.org/10.1007/s11764-019-00815-4