This document summarizes a literature review of studies examining the use of SMS/text messaging to improve health outcomes. The review identified 24 studies representing 19 randomized controlled or quasi-experimental trials published between 2005-2011 with sample sizes ranging from 17-1859 people. The studies showed that SMS was effective for improving outcomes for various health conditions like smoking cessation, weight loss, medication adherence for chronic diseases like COPD, diabetes and HIV, and sunscreen use. Key factors that influenced effectiveness included message frequency, personalization, and duration of follow up periods of several months.
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