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. 2023 Jan 28;20(3):2355. doi: 10.3390/ijerph20032355

Table 2.

Participant Characteristics.

Educational Institution Sex School Year
Girls Boys
K-12 School (D1) 6 6 Third year of high school
Private K-12 School (D2) 8 6 Second year of high school
Institute (D3) 3 3 Ninth course of basic general education
High School (D4) 5 4 First year of high school
Public K-12 School (D5) 6 3 Second year of high school
K-12 School (D6) 6 1 Ninth course of basic general education
Community K-12 School (D7) 6 5 First year of high school
K-12 School (D8) 5 5 Third year of high school