Table 1.
Demographic data of children divided according to sex and genotype.
| Sex | Total n(%) |
Val/Val n(%) |
Val/Met n(%) |
Met/Met n(%) |
|
|---|---|---|---|---|---|
| Sample distribution | Girls | 215(55) | 79 (37) | 103 (48) | 33 (15) |
| Boys | 174 (45) | 62 (36) | 83 (48) | 29 (17) | |
| Mean (sd) | Mean (sd) | Mean (sd) | Mean (sd) | ||
| Grade | – | 4.0 (1.0) | 4.0 (0.9) | 4.0 (1.0) | 4.1 (1.1) |
| Age (months) | Girls | 116 (12) | 116 (13) | 117 (12) | 117 (13) |
| Boys | 115 (14) | 116 (13) | 114 (15) | 114 (16) | |
| Coefficient of variation in magnitude estimation (z-score) | Girls | 0.19 (0.07) | 0.18 (0.07) | 0.19 (0.07) | 0.20 (0.07) |
| Boys | 0.20 (0.07) | 0.19 (0.06) | 0.19 (0.07) | 0.21 (0.06) | |
| Intelligence (z-score) | Girls | 0.71 (0.8) | 0.61 (0.8) | 0.60 (0.8) | 0.93 (0.7) |
| Boys | 0.80 (0.7) | 0.89 (0.7) | 0.82 (0.7) | 0.53 (0.9) | |
| Arithmetic achievement (z-score) | Girls | 0.29 (1.1) | 0.23 (1.1) | 0.19 (1.1) | 0.45 (1.1) |
| Boys | 0.20 (1) | 0.31 (1) | 0.14 (1) | 0.14 (1) | |
| MAQ A – Self-perceived Performance (z-score) | Girls | 0.06 (0.94) | 0.11 (0.92) | 0.06 (0.96) | -0.04 (0.94) |
| Boys | -0.08 (1) | -0.24 (1.09) | 0.04 (0.97) | -0.09 (0.79) | |
| MAQ B – Attitudes Toward Mathematics (z-score) | Girls | 0.00 (0.9) | 0.05 (0.94) | -0.05 (0.91) | 0.01 (0.81) |
| Boys | 0.01 (1.03) | -0.07 (1.01) | 0.13 (1.03) | -0.13 (1.06) | |
| MAQ C – Unhappiness About Mathematics (z-score) | Girls | .01 (0.99) | 0.00 (1.11) | -0.06 (0.98) | 0.27 (0.91) |
| Boys | -0.02 (0.92) | 0.04 (0.85) | -0.02 (0.9) | -0.11 (0.99) | |
| MAQ D – Anxiety Toward Mathematics (z-score) | Girls | 0.09 (0.99) | 0.24 (1.05) | -0.04 (0.95) | 0.17 (0.95) |
| Boys | -0.11 (0.92) | -0.31 (0.91) | 0.01 (0.83) | -0.05 (1.14) | |