Psychiatric disorders in adolescents and young adults with Down syndrome and other intellectual disabilities

Table 2 Number and percentages of primary psychiatric diagnoses in Down syndrome versus other ID groups

	Down syndrome ( N = 49)		Intellectual disabilities ( N = 70)
	N	%	N	%	X ² (1), p
Psychosis NOS	17	35%	9	13%	6.46^**
Depression with psychosis	4	8%	0		5.33^*
Depressive disorders	7	15%	7	10%	.12
Bipolar disorder	2	4%	20	29%	14.34^***
Anxiety disorders^a	9	18%	7	10%	.20
Impulse control disorder^b	10	20%	27	38%	4.59^*

^* p < .05; ^** p < .01, ^*** p < .001.
^aAnxiety disorders included obsessive-compulsive disorder (DS = 4; ID = 2) with remaining diagnoses reflecting generalized anxiety disorder and one case of separation anxiety.
^bImpulse control disorder included five participants with both ADHD and impulse control disorders (DS = 2, ID = 3). Depressive disorders consisted of major depressive episodes, with one case of dysthymic disorder in the ID group.

ISSN: 1866-1955