Prevalence of neurodevelopment delay of offspring
| Age | Number of maternal comorbidity | Communication | Gross motor | Fine motor | Problem-solving | Personal–social |
| n (%) | n (%) | n (%) | n (%) | n (%) | ||
| 6 months | 0 | 318 (0.4) | 5540 (6.7) | 2788 (3.4) | 5675 (6.8) | 1898 (2.3) |
| 1 | 123 (0.1) | 2603 (3.1) | 1237 (1.5) | 2596 (3.1) | 891 (1.1) | |
| ≥2 | 19 (0.02) | 316 (0.4) | 137 (0.2) | 294 (0.4) | 101 (0.1) | |
| 1 year | 0 | 54 (0.1) | 2711 (3.3) | 2743 (3.3) | 2478 (3.0) | 566 (0.7) |
| 1 | 31 (0.04) | 1324 (1.6) | 1383 (1.7) | 1226 (1.5) | 282 (0.3) | |
| ≥2 | 6 (0.01 | 148 (0.2) | 154 (0.2) | 172 (0.2) | 57 (0.1) | |
| 1 half years | 0 | 1091 (1.3) | 2138 (2.6) | 2000 (2.4) | 1831 (2.2) | 1209 (1.5) |
| 1 | 528 (0.6) | 1100 (1.3) | 984 (1.2) | 949 (1.1) | 564 (0.7) | |
| ≥2 | 76 (0.1) | 148 (0.2) | 156 (0.2) | 128 (0.2) | 78 (0.1) | |
| 2 years | 0 | 1851 (2.2) | 2816 (3.4) | 1060 (1.3) | 2106 (2.5) | 1400 (1.7) |
| 1 | 1048 (1.3) | 1474 (1.8) | 590 (0.7) | 1004 (1.2) | 706 (0.9) | |
| ≥2 | 147 (0.2) | 176 (0.2) | 84 (0.1) | 122 (0.1) | 99 (0.1) | |
| 2 half years | 0 | 2445 (3.0) | 2042 (2.5) | 2696 (3.3) | 2708 (3.3) | 1634 (2.0) |
| 1 | 1376 (1.7) | 1086 (1.3) | 1389 (1.7) | 1445 (1.7) | 860 (1.0) | |
| ≥2 | 199 (0.2) | 132 (0.2) | 186 (0.2) | 187 (0.2) | 112 (0.1) | |
| 3 years | 0 | 1901 (2.3) | 2037 (2.5) | 3492 (4.2) | 3406 (4.1) | 1603 (1.9) |
| 1 | 1030 (1.2) | 1102 (1.3) | 1843 (2.2) | 1783 (2.2) | 861 (1.0) | |
| ≥2 | 164 (0.2) | 144 (0.2) | 245 (0.3) | 260 (0.3) | 122 (0.1) | |
| 3 half years | 0 | 2873 (3.5) | 2020 (2.4) | 2522 (3.0) | 2689 (3.2) | 2130 (2.6) |
| 1 | 1467 (1.8) | 1098 (1.3) | 1341 (1.6) | 1508 (1.8) | 1171 (1.4) | |
| ≥2 | 219 (0.3) | 155 (0.2) | 182 (0.2) | 218 (0.3) | 154 (0.2) | |
| 4 years | 0 | 2157 (2.6) | 2597 (3.1) | 3038 (3.7) | 1733 (2.1) | 2629 (3.2) |
| 1 | 1118 (1.3) | 1347 (1.6) | 1651 (2.0) | 977 (1.2) | 1362 (1.6) | |
| ≥2 | 166 (0.2) | 177 (0.2) | 239 (0.3) | 145 (0.2) | 194 (0.2) |