Effect of Mobile Health on Obese Adults: A Systematic Review and Meta-Analysis
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Objectives: This study was conducted to examine the effects of mobile health (mHealth), using mobile phones as an intervention for weight loss in obese adults. Methods: An electronic search was carried out using multiple databases. A metaanalysis of selected studies was performed. The effects of mHealth were analyzed using changes in body weight and body mass index (BMI). Results: We identified 20 randomized controlled trials (RCTs) involving 2,318 participants who fit our inclusion criteria. The meta-analysis showed that body weight was reduced with a weighted mean difference (WMD) of –2.35 kg (95% confidence interval [CI], –2.84 to –1.87). An examination of the impact of duration of intervention showed that weight loss was greater after 6 months of mHealth (WMD = –2.66 kg) than between three and four months (WMD = –2.25 kg); it was maintained for up to 9 months (WMD = –2.62 kg). At 12 months, weight loss was reduced to a WMD of –1.23 kg. BMI decreased with a WMD of –0.77 kg/m2 (95% CI, –1.01 to –0.52). BMI changes were not statistically significant at 3 months (WMD = –1.10 kg/m2), but they were statistically significant at 6 months (WMD = –0.67 kg/m2). Conclusions: The use of mHealth for obese adults showed a modest short-term effect on body weight and BMI. Although the weight loss associated with mHealth did not meet the recommendation of the Scottish Intercollegiate Guideline Network, which considers a reduction of approximately 5 to 10 kg of the initial body weight as a successful intervention. Well-designed RCTs are needed to reveal the effects of mHealth interventions.
Abstract
Objectives: This study was conducted to examine the effects of mobile health (mHealth), using mobile phones as an intervention for weight loss in obese adults. Methods: An electronic search was carried out using multiple databases. A metaanalysis of selected studies was performed. The effects of mHealth were analyzed using changes in body weight and body mass index (BMI). Results: We identified 20 randomized controlled trials (RCTs) involving 2,318 participants who fit our inclusion criteria. The meta-analysis showed that body weight was reduced with a weighted mean difference (WMD) of –2.35 kg (95% confidence interval [CI], –2.84 to –1.87). An examination of the impact of duration of intervention showed that weight loss was greater after 6 months of mHealth (WMD = –2.66 kg) than between three and four months (WMD = –2.25 kg); it was maintained for up to 9 months (WMD = –2.62 kg). At 12 months, weight loss was reduced to a WMD of –1.23 kg. BMI decreased with a WMD of –0.77 kg/m2 (95% CI, –1.01 to –0.52). BMI changes were not statistically significant at 3 months (WMD = –1.10 kg/m2), but they were statistically significant at 6 months (WMD = –0.67 kg/m2). Conclusions: The use of mHealth for obese adults showed a modest short-term effect on body weight and BMI. Although the weight loss associated with mHealth did not meet the recommendation of the Scottish Intercollegiate Guideline Network, which considers a reduction of approximately 5 to 10 kg of the initial body weight as a successful intervention. Well-designed RCTs are needed to reveal the effects of mHealth interventions.
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