Dataset Information

Month of birth and risk of autism spectrum disorder: a retrospective cohort of male children born in Israel.

ABSTRACT:

Background

Increased incidence and prevalence of autism spectrum disorder (ASD) over the last two decades have prompted considerable efforts to investigate its aetiological factors. We examined an association between month of birth and ASD incidence.

Methods

In a retrospective cohort of male children born from January 1999 to December 2008 in a large health organisation in Israel (Maccabi Healthcare Services), ASD was followed from birth through December 2015.

Results

Of 108?548 boys, 975 cases of ASD were identified. The highest rates (10.3 and 10.2 per 1000 male live births) were recorded for children born in May and August, respectively, and the lowest rates for February (7.6 per 1000 male live births). Among lower socioeconomic status households, boys born in August were more likely (OR=1.71; 95% CI 1.06 to 2.74) of being diagnosed with ASD than children born in January. Significantly higher rates were not observed for other months.

Conclusions

In line with several previous studies, we found a modestly higher likelihood of autism occurrence among male children of lower socioeconomic levels born in August.

SUBMITTER: Shalev H

PROVIDER: S-EPMC5702026 | biostudies-literature | 2017 Nov

REPOSITORIES: biostudies-literature

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Publications

Month of birth and risk of autism spectrum disorder: a retrospective cohort of male children born in Israel.

Shalev Hila H Solt Ido I Chodick Gabriel G

BMJ open 20171116 11

<h4>Background</h4>Increased incidence and prevalence of autism spectrum disorder (ASD) over the last two decades have prompted considerable efforts to investigate its aetiological factors. We examined an association between month of birth and ASD incidence.<h4>Methods</h4>In a retrospective cohort of male children born from January 1999 to December 2008 in a large health organisation in Israel (Maccabi Healthcare Services), ASD was followed from birth through December 2015.<h4>Results</h4>Of 10 ...[more]

PMID: 29150463

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Project description:Background:Lower gestational age may increase autism spectrum disorder (ASD) vulnerability; however, the incidence of ASD diagnosis through a direct assessment on every very preterm birth child on the population base remains unclear. Moreover, the behavioral characteristics of preterm birth ASD are unknown. Methods:Every very preterm birth child (gestational age <?32?weeks; birth weight <?1500?g) who was discharged from neonatal intensive care units in Southern Taiwan and prospectively followed to 5?years of age was evaluated using the Autism Diagnostic Observation Schedule (ADOS) and the Autism Diagnostic Interview-Revised (ADI-R). The term birth (gestational age >?37?weeks) ASD children characterized by ADOS and ADI-R were group matched to the preterm birth ASD by age at examination for comparison. ADOS severity scores were calculated by the Mann-Whitney U test and ADI-R by multivariate analysis of variance and canonical discriminant analysis. Results:Two hundred forty-six (87%) of the 283 very preterm survivors were followed prospectively to 5?years of age. Nineteen (7.7%) of the 246 children fulfilled the diagnostic criteria of ASD. After excluding 1 patient with cerebral palsy and profound mental disability, 18 preterm ASD children were compared with 44 term birth ASD children. The two ASD groups were comparable for age at examination, gender, and intelligence quotient. The two groups showed comparable ADOS severity scores in social affect deficits, restricted repetitive behaviors, and total score, but had differences in qualitative abnormalities in reciprocal social interaction (Wilks lambda F value?=?6.2, P?<?0.001) of ADI-R. Compared to term birth ASD children, preterm birth ASD children exhibited worse nonverbal behaviors that regulate social interaction (OR 2.59, 95% CI 1.41-4.73, P?=?0.002) but more favorable peer relationships (OR 0.58, 95% CI 0.38-0.90, P?=?0.01) and socioemotional reciprocity (OR 0.55, 95% CI 0.33-0.92, P?=?0.02). In contrast to the heterogeneous severity of social reciprocity in the term ASD group, the behavioral characteristics of the preterm ASD group showed a homogeneous reciprocal social interaction pattern. Conclusions:The 5-year incidence rate of ASD was high in very preterm birth children. Preterm birth ASD exhibited a specific behavioral phenotype of reciprocal social interaction.

Dataset Information

Month of birth and risk of autism spectrum disorder: a retrospective cohort of male children born in Israel.

Background

Methods

Results

Conclusions

Publications

Month of birth and risk of autism spectrum disorder: a retrospective cohort of male children born in Israel.

Similar Datasets

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