Table 1.

Descriptive Statistics on Family Constellations.

	2−Child Families	3−Child Families	4+Child Families	Total
1-Child Families	-	-	-	18
Any unaffected non-target child	14	8	6	28
All non-target children with any diagnosis	26	11	4	41
Total Number of Families	40	19	10	87
All non-target children are unaffected	14	1	0	15
Any non-target child with premutation	2	3	4	9
Any non-target child with FXS	14	13	7	34
Any non-target child with other diagnosis*	16	15	9	40

Note. Ns represent number of families in each category. Ns within the shaded area of the table are non-mutually exclusive.

^*The “other diagnoses” (with number of children in parentheses) include learning disability (N = 29), attention deficit disorder or attention deficit/hyperactivity disorder (N = 29), psychiatric disorder (N = 29), intellectual disability (N = 22), medical diagnosis (N = 18), autism spectrum disorder (N = 7), other genetic disorder (N = 6).