Introduction:
Adherence to web-based symptom reporting interventions is known to be low. Yet, few studies have determined factors associated with patient adherence. The purpose of this study is to determine the clinical and demographic factors associated with adherence to web-based remote symptom reporting.

Methods:
We assessed adherence to daily symptom reporting on the Advanced Symptom Monitoring and Management System (ASyMS). Patients were given a mobile phone with an android app interface pre-installed and were instructed to report symptoms at least once daily. Adherence is calculated as the proportion of days a patient completed at least one report while enrolled in the study. We conducted linear regression to determine factors strongly associated with adherence.

Results:
There were 2838 symptom reports collected from 38 patients (Female=27). The mean age of participants was 54 years (23-80). The median rate of adherence was 70% (interquartile range, 44%-91%). Patients were more likely to be adherent to ASyMS-Can Intervention if they were older in age (β = 0.011, p<0.01). After controlling for age, those who did own a smartphone at baseline were more adherent than those did not (p <0.01).These still held after controlling for sex, ethnicity and educational attainment. Patient sex, cancer type, employment status and having young children were not strong predictors of adherence.

Conclusions:
Older patients were more likely to adhere to web-based symptom reporting. This may be the effect of younger patients undergoing high dose chemotherapy treatments. Future studies should investigate the effect of increased adherence on improving patient outcomes.

MASCC/ISOO Annual Meeting on Supportive Care in Cancer