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Subgroup analyses of BMI.
| Subgroups | Study included number | Heterogeneity | Effect model | Meta analysis | ||
|---|---|---|---|---|---|---|
| P value | I2(%) | Relative effect (95%CI) | P value | |||
| Mobile health applications | 2 | 0.62 | 0 | Fixed | -2.73 (-3.71, -1.76) | <0.00001 |
| Encouragement courses and supervision training | 4 | 0.94 | 0 | Fixed | -0.45 (-0.84, -2.29) | 0.02 |
