Table 1. Prevalence of deficiency in mid-gestation and cord 25OHD samples stratified by ASDa.
| ASD cases (proportion) | Non-ASD controls (proportion) | |
|---|---|---|
| Mid-gestation | ||
| Deficient | 15 (0.24) | 639 (0.16) |
| Insufficient | 13 (0.21) | 1011 (0.26) |
| Sufficient | 34 (0.55) | 2245 (0.58) |
| Total | 62 | 3895 |
| Cord | ||
| Deficient | 14 (0.30) | 1040 (0.36) |
| Insufficient | 21 (0.46) | 1139 (0.40) |
| Sufficient | 11 (0.24) | 691 (0.24) |
| Total | 46 | 2870 |
ASD, autism spectrum disorder; 25OHD, 25-hydroxyvitamin D.
a
Deficient is 25OHD concentrations <25 nmol/L, insufficient is 25OHD concentrations 25 to <50 nmol/L; sufficient is 25OHD concentrations ≥50 nmol/L.