Employed the Diagnostic Interview Schedule for Children to show that c
hildren diagnosed with an anxiety disorder score significantly higher
on the Childhood Anxiety Sensitivity Index (CASI) than nondiagnosed ch
ildren. Interviews and self-report measures regarding the child were c
ompleted by 201 children and their parents from a metropolitan area mi
litary community who were participating in a National Institute of Men
tal Health epidemiological survey. An analysis of variance was used to
compare CASI scoring across three groups: children receiving anxiety
diagnoses, children receiving externalizing diagnoses but no anxiety d
iagnosis, and children receiving no diagnoses. Although scoring on the
CASI differentiated anxious children from the no-diagnosis control gr
oup, it did not differentiate anxious children from those receiving ex
ternalizing diagnoses. Implications of the findings for the validity o
f the CASI, the issue of anxiety sensitivity as a component of some ex
ternalizing disorders, and suggestions for further investigation are d
iscussed.