50
Participants
Start Date
August 1, 2022
Primary Completion Date
September 15, 2022
Study Completion Date
September 30, 2022
light cover
10 wards were randomly selected as the intervention group (opaque black tape covering part of the light source), and another 10 wards were selected as the control group (no intervention).
Weizhuo Yi, Hefei
Weizhuo Yi
OTHER