SMS coaching for weight loss

Daily tailored text/MMS coaching produced about 2 kg more weight loss than print materials over 4 months in overweight adults.

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What was the study question?

Whether text messaging helps adults self-monitor weight and improve weight outcomes.

How large was the analyzed sample?

65 participants with mean BMI 33.2 kg/m²; 80% women.

What did the intervention deliver?

Daily tailored SMS/MMS messages plus brief monthly counselor calls for 4 months.

What did the comparison group receive?

Monthly mailed print materials for 4 months after the same baseline assessment.

What was the primary weight finding at 4 months?

Intervention lost 1.97 kg more than comparison (P = .02).

What was adjusted mean loss in the intervention arm?

2.88 kg.

What was adjusted mean loss in the comparison arm?

0.91 kg.

Who was eligible by BMI?

Adults 25–55 years with BMI 25–39.9 who used (or would learn) SMS.

Besides messages, what weekly tasks were assigned?

Self-weigh, set food/exercise goals, and aim for ~500 kcal/day reduction using weekly topics.

What analysis compared groups over time?

Mixed-model repeated-measures analysis of weight status.