Skip to main content
. 2019 May 31;7:e6997. doi: 10.7717/peerj.6997

Table 1. The distribution of the studied children.

Province Area County-level city Number of districts Number of districts selected Number of schools selected Boys Girls Total
Liaoning Northern China Beizhen 17 8 23 712 706 1,418
Guangxi Southern China Dahua 16 8 9 466 454 920
Gansu Western China Linxia 10 5 10 522 600 1,122
Hunan Central China Linxiang 13 6 6 844 632 1,476