Cati G Brown-Johnson, Anna Sophia Lessios, Samuel Thomas, Mirini Kim, Eri Fukaya, Siqi Wu, Samantha M R Kling, Gretchen Brown, Marcy Winget
A Nurse-Led Care Delivery App and Telehealth System for Patients Requiring Wound Care: Mixed Methods Implementation and Evaluation Study
JMIR formative research
textbased programs shown effectively address wide variety health issues although little research examines short message service sms text messaging program characteristics predict participant retention attrition features sms text message programs program duration intensity message content participants context may impact impact stop messagesmessages instructions drop sms text message programmay particularly important investigate aim study describe attrition text2bhealthy textbased nutrition physical activity promotion program parents lowincome elementary school children determine impact message content number stop messages received attrition using data 972 parents enrolled text2bhealthy created kaplanmeier curves estimate differences program duration different sms text message types including nutrition physical activity stop messages covariates including rurality number stop messages received included retention rates school ranged 74 6081 950 132139 average retention rate 857 833972 across schools program duration ranged 7 282 days median program duration 233 days average program duration 2117 days among dropped program duration ranged 7 247 days median program duration 1025 days receiving stop message increased probability attrition compared receiving messages nutrition physical activity topics hazard ratio515 95 ci 3246817 p001 furthermore additional stop message received increased probability attrition hazard ratio1036 95 ci 6141746 p001 degree rurality also significant effect probability attrition metropolitan county participants likely drop program rural county participants interaction sms text message type total number stop messages received significant effect attrition effect number stop messages received dependent sms text message type study demonstrates potential sms text message programs retain participants time furthermore study suggests probability attrition increases substantially participants receive messages instructions dropping program program planners carefully consider impact stop messages program content characteristics program retention additional research needed identify participant programmatic contextual predictors program duration explicate relationship program duration program efficacy