Black and Chinese pupils were 26% and 38% more likely to be autistic respectively and autistic children were much more likely to face significant social disadvantage. The results are published today in JAMA Pediatrics.
The team drew on data from the School Census from the National Pupil Database, collected by the Department for Education from individuals aged 2-21 years old in state-funded schools in England. Of more than 7 million pupils studied, 119,821 pupils had a diagnosis of autism in their record in the English state educational system, of whom 21,660 also had learning difficulties (18.1%). Boys showed a prevalence of autism of 2.8% and girls showed a prevalence of 0.65%, with a boy-to-girl ratio of 4.3:1.
Prevalence was highest in pupils of black ethnicity (2.1%) and lowest in Roma/Irish Travellers (0.85%), with these estimates being the first to be published for these populations. Pupils with a record of autism in schools were 60% more likely to also be socially disadvantaged, and 36% less likely to speak English. The findings reveal significant differences in autism prevalence, as recorded in formal school systems, across ethnic groups and geographical location.
The lead researcher of the study, Dr Andres Roman-Urrestarazu from the Autism Research Centre (ARC) and Cambridge Public Health at the University of Cambridge, said: “We can now see that autism is much more common than previously thought. We also found significant variations in autism diagnosis in different ethnic minorities, though the reason why this should be the case isn’t clear and warrants further research.”
Previous estimates of the prevalence of autism in the UK by the same research group in Cambridge, and based on a school-based survey, suggested that one in 64 children (1.57%) were autistic. The new study, based on school records that usually underestimate the actual proportion of children who meet diagnostic criteria, shows a considerable increase in the autism prevalence in England. The researchers say the increase is likely to be because autism has become better recognised by both parents and schools in recent years.
Image: Boy at sunset
Credit: Artsy Solomon
Reproduced courtesy of the University of Cambridge