HDCN Abstract:  ASN Annual Meeting 2020 -- Digital Meeting  

Hamroun A, Antoine D, Blum D, et al.

Daily Caffeine Consumption and Risk of AKI Related to Platinum-Salt Chemotherapy: A Prospective Cohort Study

ASN Annual Meeting 2020 -- Digital Meeting
J Am Soc Nephrol (Oct) 31:10A 2020

BACKGROUND

Although their efficacy has been well-established in Oncology, the use of platinum salts remains limited due to the occurrence of acute kidney injury (AKI). Caffeine has been suggested as a potential pathophysiological actor of platinum salt-induced AKI, through its hemodynamic effects. This work aims to study the association between caffeine consumption and the risk of platinum salt-induced AKI.

METHODS

We conducted a single-center prospective cohort study that has included 108 consecutive thoracic cancer patients receiving a first-line platinum-salt chemotherapy between January 2017 and December 2018. Before the first course of chemotherapy, they were all invited to fill in a previously validated auto-questionnaire, designed for a detailed evaluation of their daily caffeine consumption (mg/day). The association of daily caffeine consumption with the risk of platinum-salt induced AKI was estimated by cause-specific Cox proportional hazard model adjusted for several known confounders (baseline renal function and serum albumin level, nature and dose of platinum-salt, tobacco exposure, and Performans status).

RESULTS

Overall, 34 patients (31.5%) (mean age 61.7 years, 65% men, 80% tobacco users) experienced a platinum salt-induced AKI (67% grade 1) and 47 (43.5%) died during follow-up (6.2 months [3.4; 8.4]). The group of high-caffeine consumption (≥ 386mg/day) had a twice higher risk of AKI (HR=2.12 [1.01; 4.45]) in the fully adjusted model. The cumulative incidence of AKI (considering the competing risk of death) was also significantly increased in the high-caffeine consumption group (p=0.03, see figure 1).

CONCLUSION

In a population of thoracic cancer patients, the group of high-caffeine consumption was exposed to a significantly higher risk of platinum salt-induced AKI.

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