Table 1 Demographic data of the participated children among the 4 age groups
Test groups | Group 1 (2–< 2.6 y) (n = 30) | Group 2 (2.6–< 3 y) (n = 30) | Group 3 (3–< 3.6 y) (n = 30) | Group 4 (3.6–< 4 y) (n = 30) | |
|---|---|---|---|---|---|
Age, in years (mean ± SD) | 2.3 (±0.2) | 2.9 (±0.1) | 3.3 (±0.2) | 3.8 (±0.1) | |
Gender (no. %) | Males | 13 (43.3%) | 16 (53.3%) | 11 (36.7%) | 14 (46.7%) |
Females | 17 (56.7%) | 14 (46.7%) | 19 (63.3%) | 16 (53.3%) | |