Effects of smartphone interventions on cancer knowledge and coping among Latina breast cancer survivors: Secondary analysis of a pilot randomized controlled trial.

OBJECTIVE The My Guide smartphone application was developed to improve quality of life and symptom burden (primary outcomes) for Latina breast cancer survivors (BCS) and tested in a pilot randomized controlled trial compared to an attention-control condition (My Health smartphone application). This secondary analysis examined effects on breast cancer knowledge, coping, and cancer-related self-efficacy (intervention targets).Method: Latina BCS (N = 78) were randomized to My Guide or My Health for six weeks. Linear mixed-effects modeling evaluated the effects of time and study condition on the intervention targets. Effects by engagement were explored. Results: Both conditions showed improved breast cancer knowledge (p   0.05). Conclusion: Culturally-informed smartphone applications may enhance breast cancer knowledge and promote adaptive coping among Latina BCS.