Table 2. Characteristics of the selected studies.

¹⁾SD: standard deviation

²⁾mo: months

³⁾RCT: randomized controlled trial

⁴⁾BMI: body mass index

⁵⁾Con.: control group

⁶⁾Exp.: experimental group

⁷⁾INCENT: internet-based intervention with monetary incentives

⁸⁾PA: physical activity

⁹⁾GEICO: the government employees insurance company