Abstract
We sought to characterize the incidence of chronic opioid dependence among head and neck cancer survivors treated by radiation, as well as to identify patient and treatment factors associated with persistent use. The medical records of patients with head and neck cancer who received radiation therapy from January 2012 to July 2016 were reviewed. All patients received 60 to 70 Gy with curative intent. Patients who progressed or died within 1 year were intentionally excluded. Opioid doses were calculated in morphine equivalent daily doses in milligrams (mg). Univariate and multivariate regression models were used to identify associations between demographic, medical, disease, and persistent opioid use. Two hundred and sixty-one patients were included. The median follow-up was 39 months (range: 12 to 83 mo). Two hundred and eleven patients (80%) received opioids for pain control during radiation. The median morphine equivalent daily dose during treatment was 73.8 mg (range: 5 to 561 mg). Rates of persistent opioid use at 6 months, 1 year, and 2 years from completion of radiation were 41.8%, 30.1%, and 26.0%, respectively. On multivariate analysis, only preradiation opioid use correlated with persistent opioid use at all 3 time points (P<0.05). Smoking history and a Charlson comorbidity index ≥2 predicted for persistent opioid use at some time points, but not all. High rates of persistent opioid use exist in patients with head and neck cancer after radiation therapy. Early interventions to appropriately wean patients should be further investigated.
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