Optimization of Adaptive Text Messages for Cancer Survivors (OATS II)

PRIMARY OBJECTIVE: I. Determine the intervention's feasibility and acceptability. SECONDARY OBJECTIVES: I. Estimate the effect of the intervention on the percent of grains consumed that are whole. II. Estimate the effect of the intervention on total fiber intake (grams per day \[g/d\]). EXPLORATORY OBJECTIVE: I. Assess convergence of the reinforcement learning (RL) algorithm. OUTLINE: Patients receive nutrition education materials and then receive the adaptive text message intervention for 12 weeks on study. Patients who are food insecure also receive resources for food banks, information about meal delivery programs, and support for applying for Supplemental Nutrition Assistance Program (SNAP) benefits.