Development of a functional assessment of side-effects to therapy (FAST) questionnaire to assess dermatology-related quality of life in patients treated with EGFR inhibitors (EGFRI): The FAST-EGFRI

Abstract

19532 Background: Despite their beneficial antitumor effects, 75–87% patients who undergo EGFRI therapy develop dermatological toxicities (derm tox), including rash, paronychia, hair alterations, and pruritus. The purpose of this study was to develop a patient (pts) self-report questionnaire based on pts and expert (exp) input and to identify the most significant skin tox health-related quality of life (HRQL) factors. Methods: To generate the questionnaire, 20 pts with derm tox to EGFRIs and 12 expert clinicians (>50 treated pts) were asked interview questions and rated 62 items to assess the most bothersome aspects of derm tox and the impact on pts’ skin-specific HRQL. The questionnaire included items from the Skindex-29, a validated skin disease-specific HRQL questionnaire. Items were rated from 0 (not at all important) to 3 (extremely important) (range = 0–3) based on the items’ significance to patients’ HRQL. Both groups were also asked to circle 20 of the most concerning HRQL factors. Results: Eighteen pts and 11 exp completed the questionnaire. Symptoms reported frequently by both pts and exp that affected patients’ HRQL included painful (mean score 2.29 (pts), 2.70, (exp), burning (2.41 (pts), 2.70 (exp)), itchy (2.00 (pts), 2.20 (exp) skin, pain in fingers/toes (2.00 (pts), 2.40 (exp)) increased facial hair (1.93(pts), 1.70 (exp)). Both pts and exp also frequently reported that the patient’s skin condition makes them feel depressed (1.88 (pts), 2.60 (exp)) and makes work or hobbies difficult (2.00 (pts), 2.20 (exp)). The top three most concerning HRQL factors for pts were skin pain, burning and stinging, and irritation, while exp reported depression, skin pain, and derm tox affecting pts’ social life. Conclusions: These results document the trajectory of symptom burden and derm tox HRQL in EGFRI treated pts. These findings underscore that in addition to the psychosocial discomfort, physical symptoms impact HRQL. Further studies to validate the FAST-EGFRI, so that effects on HRQL of interventions against derm tox and differences between agents can be assessed are underway. No significant financial relationships to disclose.