Table 2.
Behaviour | Rate estimate | |
---|---|---|
Lower | Higher | |
Depressed mood | 19% (adults, able to self-report) (Lewis, Thomas, Murphy, & Sampson, 2004) | 43 % (adults, able to self-report) (Pulsifer, Winterkorn, & Thiele, 2007) |
Anxiety | 41% (adults, able to self-report) (Pulsifer et al., 2007) | 56% (adults, able to self-report) (Lewis et al., 2004) |
Self-injury | 17% (children and adolescents, no ID) (de Vries, Hunt, & Bolton, 2007) | 69% (children and adolescents, severe-profound ID) (de Vries, Hunt, & Bolton, 2007) |
Aggressive outbursts | 37% (adults, ID)(Wilde et al., 2017) | 66% (children and adolescents, mild-moderate ID) (de Vries, Hunt, & Bolton, 2007) |
Temper tantrums | 47% (children and adolescents, no ID) (de Vries, Hunt, & Bolton, 2007) | 70% (children and adolescents, mild-moderate ID) (de Vries, Hunt, & Bolton, 2007) |
Poor eye contact | 23% (children and adolescents, no ID) (de Vries, Hunt, & Bolton, 2007) | 71% (children and adolescents, severe-profound ID) (de Vries, Hunt, & Bolton, 2007) |
Repetitive and ritualistic behaviours | 20% (children and adolescents, no ID) (de Vries, Hunt, & Bolton, 2007) | 83% (children and adolescents, severe-profound ID) (de Vries, Hunt, & Bolton, 2007) |
Speech and language delay | 32% (children and adolescents, no ID)(de Vries, Hunt, & Bolton, 2007) | 86% (children and adolescents, severe-profound ID) (de Vries, Hunt, & Bolton, 2007) |
Overactivity/hyperactivity | 22% (adults, ID) (Hunt, 1998) | 73% (children and adolescents, severe-profound ID) (de Vries, Hunt, & Bolton, 2007) |
Impulsivity | 36% (children and adolescents, no ID) (de Vries, Hunt, & Bolton, 2007) | 62% (children and adolescents, severe-profound ID) (de Vries, Hunt, & Bolton, 2007) |
Sleep difficulties | 15% (children and adolescents, ID and no ID) (Trickett, Heald, Oliver, & Richards, 2018) | 74% (children and adolescents, severe-profound ID) (de Vries, Hunt, & Bolton, 2007) |
ID = Intellectual Disability