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. 2020 Mar 4;17(5):1666. doi: 10.3390/ijerph17051666

Table 1.

Sample subject distribution.

Grade Control Group Experimental Group
Number of Classes Number of Males Number of Females Number of Classes Number of Males Number of Females
Grade 3 18 204 221 26 343 352
Grade 4 16 159 218 23 323 322
Grade 5 15 175 145 22 292 282
Total 49 538 584 71 958 956

Note: Only students who specified their gender are included in this Table.