Fig. 1.

Estimated incidence of learning disability (LD) and autism spectrum disorders (ASD) in children aged 10 years old in 2000–2011 in England, overall and by group of ICD-10 codes. ASD = autistic spectrum disorders; ICD-10 = International Classification of Diseases version 10; LD = learning disability. Solid lines represent incidence of LD (cohort 1) and ASD without LD (cohort 2). Dashed lines represent incidence for 3 groups of conditions contributing to cohort 1: specific LD codes, “high risk” conditions and “associated” conditions (young people can have more than one condition). Dotted line represents incidence of ASD in all children (with or without LD) for comparison with nationally reported figures.