Figure 1. Study Flow Diagram.

^aThe control group used the accelerometer only for 9 months with no intervention.

^bThe regular group completed the 3-month physical activity intervention and 6-month accelerometer maintenance intervention.

^cThe plus group completed the 3-month physical activity intervention and 6-month mobile phone diary maintenance intervention with accelerometer.

^dParticipants were counted as “withdrew but followed” on the day they withdrew. Each follow-up visit after the date of withdrawal, they are included as “completed.”