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Study groups by sex and educational stage.
| Boys | Primary Education | Secondary Education |
| n (%) | n (%) | |
| Experimental group | 16 (59.26) | 11 (40.74) |
| Control group | 12 (48) | 13 (52) |
| Subtotal | 28 (53.85) | 24 (46.15) |
| Girls | Primary Education | Secondary Education |
| Experimental group | 14 (43.75) | 18 (56.25) |
| Control group | 18 (51.43) | 17 (48.57) |
| Subtotal | 32 (47.76) | 35 (52.24) |
Source: own elaboration.
