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

Authors Dudova I, Markova D, Kasparova M, Zemankova J, Beranova S, Urbanek T, Hrdlicka M

Received 19 August 2014

Accepted for publication 15 September 2014

Published 17 November 2014 Volume 2014:10 Pages 2201—2208

DOI https://doi.org/10.2147/NDT.S72921

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Editor who approved publication: Dr Roger Pinder

Iva Dudova,1 Daniela Markova,2 Martina Kasparova,3 Jana Zemankova,4 Stepanka Beranova,1 Tomas Urbanek,5 Michal Hrdlicka1

1Department of Child Psychiatry, Charles University Second Faculty of Medicine and University Hospital Motol, Prague, Czech Republic; 2Department of Pediatrics and Adolescent Medicine, Charles University First Faculty of Medicine and General University Hospital, Prague, Czech Republic; 3Department of Pediatrics, Charles University Second Faculty of Medicine and University Hospital Motol, Prague, Czech Republic; 4Department of Pediatrics, Charles University Faculty of Medicine and University Hospital, Hradec Kralove, Czech Republic; 5Institute of Psychology, Academy of Sciences, Brno, Czech Republic

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.

Keywords: autism spectrum disorders, preterm children, screening, Modified Checklist for Autism in Toddlers, Communication and Symbolic Behavior Scales Developmental Profile Infant-Toddler Checklist, Infant/Toddler Sensory Profile

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