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. 2022 Jan 19;22:46. doi: 10.1186/s12909-021-03020-z

Table 1.

Participant demographics

Characteristic Response Group 1
N=31
Group 2
N=27
Group 3
N=36
Group 4
N=35
Age, mean (SD) Years 15 (1.0) 14.7 (1.0) 14.8 (0.9) 14.8 (1.0)
Sex, No. (%) Male 15 (48%) 13 (48%) 17 (47%) 9 (26%)
Grade in schoola 9 15/30 (50%) 18/27 (67%) 24/36 (67%) 18/32 (56%)
10 11/30 (37%) 4/27 (15%) 5 (14%) 9/32 (28%)
11 2/30 (7%) 2/27 (7%) 4 (11%) 2/32 (6%)
12 2/30 (7%) 3/27 (11%) 3 (8%) 3/32 (9%)
Dominant hand Right 27 (87%) 26 (96%) 35 (97%) 33 (94%)

asome students did not provide an answer