Development of novel emoji scale to measure patient-reported outcomes in cancer patients.

Abstract

174 Background: Patient-reported outcomes (PROs), including physical function and quality of life (QOL), are important outcomes in cancer patients. Emoji are a near-universal, popular form of communication, understandable by diverse populations, including those with low health literacy. We aimed to explore whether emoji could be a valid, reliable scale for assessing PROs in cancer patients. Methods: To develop the emoji scale, 5 emoji faces were selected from the Apple emoji dictionary by study authors. 20 cancer patients participated in a card-sorting exercise to rank the emoji from negative to positive; 19 out of 20 selected the same order, which exceeded Coomb’s criteria for being a valid ordinal scale. Patients were recruited from Mayo Clinic practices. Eligibility included: adult patients with a diagnosis of lymphoma, multiple myeloma, brain, pancreatic, breast, and ovarian cancer within the past 5 years; life expectancy of > 6 months; and own an iPhone version ≥ 5.0. All patients were provided with an Apple Watch and downloaded the study app. Baseline PRO data was collected on the iPhone, including single-item linear analog self-assessments (LASA) and emoji scales for fatigue, physical function, emotional well-being, and overall QOL. Results: From 2/2017-8/2017, 294 eligible patients were recruited. 25% were male, and median age was 53 years (range 20-79). The median time since diagnosis was 8.4 months (range 0-60); 63% were on active therapy, 27% were in observation post-treatment, and 10% had not been treated. All patients were “extremely” confident filling out forms, 99% had used a computer in the past 12 months, and 27% had ever used a smart watch. Emoji responses were significantly associated with validated measures of PROs; the Spearman correlations between the ordinal emoji scales and LASAs were -0.83 for fatigue, 0.72 for physical well-being, 0.72 for emotional well-being, and 0.77 for overall QOL (all p < 0.0001). Of the 75 patients who have completed the study thus far, 92% reported they would use emoji scales again and 89% would recommend that others use emoji scales. Conclusions: A novel ordinal emoji scale is strongly associated with accepted measures of PROs in cancer patients and should be studied further.