ArticleJournal of autism and developmental disorders2001
Birth order effects on nonverbal IQ scores in autism multiplex families.
Article in Journal of autism and developmental disorders, 2001. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers, 1 of them a synthesis that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
13 citing papers in PubMed, 1 synthesis or guideline pooled it.
- Gender and age differences in the core triad of impairments in autism spectrum disorders: a systematic review and meta-analysis.Journal of autism and developmental disorders · 2014Pooled it
- The Impact of Birth Order on Language Development in Autistic Children from Simplex Families.Journal of autism and developmental disorders · 2022Article
- Exposure to General Anesthesia May Contribute to the Association between Cesarean Delivery and Autism Spectrum Disorder.Journal of autism and developmental disorders · 2019Article
- Uptake and Diagnostic Yield of Chromosomal Microarray in an Australian Child Development Clinic.Children (Basel, Switzerland) · 2014Article
- Immune dysregulation in autism spectrum disorder.European journal of pediatrics · 2014Review
- Does epilepsy in multiplex autism pedigrees define a different subgroup in terms of clinical characteristics and genetic risk?Molecular autism · 2013Article
- Brief report: Asperger's syndrome and sibling birth order.Journal of autism and developmental disorders · 2013Article
- Sex differences in children with autism spectrum disorder identified within a high-risk infant cohort.Journal of autism and developmental disorders · 2012Article
- The effects of birth order and birth interval on the phenotypic expression of autism spectrum disorder.PloS one · 2012Article
- Quantifying and modeling birth order effects in autism.PloS one · 2011Article
- Brief Report: Relationship between non-verbal IQ and gender in autism.Journal of autism and developmental disorders · 2009Article
- Brief report: effect of maternal age on severity of autism.Journal of autism and developmental disorders · 2007Article
- Neuropsychological functioning of siblings of children with autism, siblings of children with developmental language delay, and siblings of children with mental retardation of unknown genetic etiology.Journal of autism and developmental disorders · 2007Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
6 authors.
Funding
Abstract
Lord (1992) published a brief report showing a trend for decreasing nonverbal IQ scores with increasing birth order in a sample of 16 autism multiplex families, and urged replication in a larger sample. In this report, analyses of nonverbal IQ scores for a sample of 144 autism multiplex families indicated that nonverbal IQ scores were significantly lower in secondborn compared with firstborn siblings with autism. This birth order effect was independent of gender as well as the age differences within sib pairs. No such birth order effects were found for social or communicative deficits as measured by the Autism Diagnostic Interview-Revised (ADI-R), but there was a modest tendency for increased scores for ritualistic behaviors for the firstborn sibs. Further, there were no gender differences on nonverbal IQ scores in this sample. Results are discussed in terms of implications for genetic studies of autism.
Indexed as
Identifiers
11794410What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.