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. 2021 Aug 25;8:684286. doi: 10.3389/fnut.2021.684286

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Copyright © 2021 Dong, Chen, Chen, Wen, Yang, Wang, Ma, Song, Ma and Lau.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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The population attributable risk and theoretical proportions of low- and high-PFI levels (dependent variables) and its theoretical changes to actual levels if 20 related influencing factors (independent variables) were controlled. (A) Total low PFI level. (B) Boys low PFI level. (C) Girls low PFI level. (D) Total high PFI level. (E) Boys high PFI level. (F) Girls high PFI level.