分组 | 3个月 | 6个月 | 1岁 | 2岁 | 3岁 |
A | −1.82 ± 1.39 | −0.94 ± 2.65 | −0.86 ± 0.67 | −0.97 ± 0.69 | −0.86 ± 0.73 |
B | −1.49 ± 1.14 | −1.50 ± 0.78 | −1.06 ± 0.56 | −0.60 ± 0.44 | −1.75 ± 0.71 |
C | −1.97 ± 1.82 | −2.13 ± 2.36 | −1.18 ± 0.70 | −0.69 ± 0.55 | −1.50 ± 0.71 |
D | −1.95 ± 1.73 | −1.60 ± 1.80 | −1.11 ± 1.34 | −0.85 ± 1.40 | −0.63 ± 1.00 |