Psychiatric diagnoses in relation to severity of intellectual disability and challenging behaviors : a register study among older people
OBJECTIVE: To investigate the possible association between severity of intellectual disability (ID) and presence of challenging behavior, respectively, on diagnoses of psychiatric disorders among older people with ID.METHODS: People with a diagnosis of ID in inpatient or specialist outpatient care in 2002-2012 were identified (n = 2147; 611 with mild ID, 285 with moderate ID, 255 with severe or pr