e17559 Background: Patients with advanced head and neck cancer (HNC) are commonly treated with chemoradiation with concomitant cisplatin. Acute kidney injury (AKI) is considered a dose-limiting toxicity of cisplatin. We aim to describe the incidence and risk factors of AKI. Methods: In our tertiary center, we retrospectively identified 261 patients with advanced HNC and adequate renal function who were treated curatively from 2008 to 2015 using radiotherapy and concurrent three-weekly cisplatin. Outcome was the first AKI episode, defined according to the Kidney Disease Improving Global Outcomes (KDIGO) guidelines as a ≥50% rise in serum creatinine compared to baseline. Several potential predictors were investigated by means of logistic regression analyses. Results: In our cohort (mean age 58 ± 8 years, 74.3% male), a total of 102 (39.1%) patients developed AKI. Factors significantly associated with AKI in the univariate analysis were: age, alcohol consumption, excessive smoking, diabetes, hypertension, diuretic use, renin-angiotensin-aldosterone-system blockers, and administration of furosemide when indicated during first cisplatin cycle. In the multivariable model smoking 6-25 and > 25 cigarettes per day (OR 1.85; 95% CI 1.01-3.39 and OR 3.22; 95% CI 1.34-7.70, respectively), diabetes (OR 2.58; 95% CI, 1.01-6.61), furosemide (OR 2.39; 95% CI, 1.36-4.18) , and hypertension (OR 2.79; 95% CI, 1.52-5.12) remained independent risk factors for AKI. Conclusions: The identified risk factors smoking, diabetes, and hypertension may have caused pre-existing kidney damage and therefore have predisposed to AKI. Co-administration of furosemide with cisplatin is a potentially reversible risk factor for AKI.
PO-057 Predicting risk of Acute Kidney Injury in head and neck cancer patients receiving chemoradiotherapy