Autism associated with preterm and low birth weight (both associated with low vitamin D) – Nov 2014

Comparison of three screening tests for autism in preterm children with birth weights less than 1,500 grams.

Neuropsychiatr Dis Treat. 2014 Nov 17;10:2201-8. doi: 10.2147/NDT.S72921. eCollection 2014.
Dudova I1, Markova D2, Kasparova M3, Zemankova J4, Beranova S1, Urbanek T5, Hrdlicka M1.

BACKGROUND:
Preterm children seem to be at increased risk for autism spectrum disorders (ASD).

METHODS:
Parents of 157 children with birth weights less than 1,500 g (age 2 years, corrected for prematurity; 88 boys, 69 girls) completed screening questionnaires. The screening battery included the Modified Checklist for Autism in Toddlers (M-CHAT), Communication and Symbolic Behavior Scales Developmental Profile Infant-Toddler Checklist (CSBS-DP-ITC), and the Infant/Toddler Sensory Profile (ITSP). Children with disabilities were excluded. All children who screened positive on any of the screening tools were subsequently assessed by clinical examination including the Autism Diagnostic Observation Schedule.

RESULTS:
Fifty-six children (35.7%) screened positive on at least one of the parental screening questionnaires. Of the 56 children who tested positive, 33 participated in the detailed clinical follow-up assessment. A diagnosis of ASD was confirmed in 13 of the 33 children. The ASD prevalence was 9.7% of the sample. Analysis of children with and without an ASD diagnosis found significant differences relative to gestational age (26.9 weeks vs 28.3 weeks, P=0.033) and length of the stay in hospital (89.5 days vs 75.4 days, P=0.042). The screening tool with the most positive results was CSBS-DP-ITC (42 positive screens PS), followed by M-CHAT (28 PS), and ITSP (22 PS). Differences in the frequency of PS among the tests were significant (P=0.008). CSBS-DP-ITC had the highest sensitivity (0.846), followed by M-CHAT (0.692) and ITSP (0.462).

CONCLUSION:
Our results indicate a higher prevalence of autism in children with birth weights <1,500 g at 2 years of age compared to the general population prevalence. The ASD diagnosis was associated with shorter gestation times and longer hospital stays. Our findings support the simultaneous use of more than one screening tests in order to increase screening sensitivity.

PMID: 25484588
 Download the PDF from Vitamin D Life.

---

See also Vitamin D Life

• Autism treated by Vitamin D: Dr. Cannell - video June 2013 includes many reasons why he believes Autism is related to Vitamin D

1. Both have strong inheritance features – Vitamin D about 60%
2. Both have gotten substantially worse in last 30 years
3. Vitamin D is known to be involved in brain development
4. All autistic children are VitD deficient, but not all children who are deficient are autistic: genes are involved
5. When giving vitamin D to cure children of rickets “mental dullness” decreases as well
6. Children with genes which give them too much (Williams Syndrome) have to reverse of autism – too sociable
7. Mothers having lots of fish (and thus more vitamin D) give birth to kids with less autistic symptoms
8. Both associated with weak bones
9. Both worse around the age of weaning
10. Autism is more common in rich families – more likely to apply sun screen and stay indoors
11. Autism increases with drugs which lower levels of vitamin D
12. Seizures are common with Autism - Vitamin D has been shown to reduce seizures
13. Fewer autistic symptoms (such as sleep problems) during summer: when child gets more vitamin D from the sun
14. Both worse with latitude
15. Both vary with Ultraviolet light
16. Both vary with time of year (more birth of autistics in March in Northern hemisphere)
17. 2X more urban autism – less UVB in urban environments
18. Both worse with pollution
19. Both worse with increased clouds and rain
20. Both worse with closely spaced pregnancies
21. Autistics have abnormal immune response – similar to that of vitamin D deficiency
22. Low levels of vitamin D in mother animals reduces brain function in offspring
23. Vitamin deficient rat pups have similar brain abnormalities to that of human autistic children
24. Autistic children get less vitamin D in their blood for the same amount of sun exposure
25. The 4 males/1 female ratio - Note estrogen increases vitamin D in the brain (testosterone does not)
26. Both worse in African Americans (A-A 2-3 increased autism rate)
27. Both worse in Dark-skinned immigrants in Europe

•    Note: All articles in Autism category 133 items