Table 3.
Overview of studies of vitamin D levels in individuals with autism
| Author (year) | Country: study participants (n) | ASD group | Comparison group | p | ||
|---|---|---|---|---|---|---|
| nmol/L | ng/mL | nmol/L | ng/mL | |||
| Humble et al. (2010)* | Sweden: adults (121) | 31.5 | 12.6 | – | – | |
| Molloy et al. (2010) | USA: boys 4–8 years (89) | 49.4 | 19.8 | 44.0 | 17.6 | 0.4 |
| Meguid et al. (2010) | Egypt: children 2–8 years (112) | 71.3 | 28.5 | 100.3 | 40.1 | <0.001 |
| Mostafa and AL-Ayadhi (2012) | Saudi Arabia: children 5–12 years (80) | 46.3 | 18.5 | 82.5 | 33.0 | <0.001 |
| De SouzaTostes et al. (2012) | Brazil: children ±7 years (48) | 66.2 | 26.5 | 101.3 | 40.5 | <0.001 |
| Gong et al. (2014) | China: children ±4 years (96) | 49.8 | 19.9 | 56.5 | 22.6 | 0.002 |
| Kočovská et al. (present study) | Faroe Islands: young adults 15–24 years (219) | 24.8 | 9.9 | 37.6 | 15.0 | 0.002 |