Follow-up of the Participants
Among the recruited 750 participants who met the inclusion criteria, 746 (99.5%) participants completed the baseline test at time 1, including 100% (250/250) in group DPI, 99% (248/250) in group PI, and 99% (248/250) in group C. At time 2, a total of 89.9% (674/750) of participants completed the follow-up test, including 94.8% (237/250) in group DPI, 86% (215/250) in group PI, and 88.8% (222/250) in group C. At time 3, a total of 85.6% (642/750) of participants completed the follow-up, including 94.8% (237/250) in group DPI, 81.2% (203/250) in group PI, and 80.8% (202/250) in group C. Details are illustrated in Follow-up flowchart of the participants from the beginning to the end of the study.