Table 2: Group differences on measures of child psychiatric illness.

Child symptomatology measuresSelective mutism group
M (SD)
Community comparison group
M (SD)
d

ADIS-IV- P a CS R b
(i) Selective mutism5.50 (.90).00 (.00)8.72*
(ii) Separation anxiety disorder1.40 (2.21).07 (.37).85
(iii) Social phobia3.57 (2.03).10 (.56)2.35*
(iv) Generalized anxiety disorder.80 (1.56)0 (0).73
(v) Oppositional defiant disorder.27 (.91)0 (0).38

SM Q c subscales
(i) School10.30 (3.79)21.20 (2.71)3.32*
(ii) Home/family17.70 (2.69)22.16 (2.15)1.81*
(iii) Public/social7.63 (2.70)16.08 (2.36)3.37*

SCARE D d subscales
(i) Somatic/panic17.10 (3.60)13.56 (1.00)1.32*
(ii) General anxiety15.52 (4.27)10.84 (2.87) 1.29*
(iii) Separation anxiety13.03 (3.87)10.44 (2.87).77
(iv) Social phobia18.83 (2.44)9.72 (3.88) 2.92*
(v) School phobia5.72 (1.67)4.32 (.75) 1.07*

DBDR S e subscales
(i) Oppositional/defiant13.34 (4.43)10.32 (2.72).82
(ii) Inattention15.28 (6.23)10.84 (1.99).95*

DBDR S d subscales
(i) Impulsivity/overactivity15.69 (5.93)12.36 (2.51).73

a ADIS-IV-P  =  Anxiety Disorders Interview Schedule for the DSM-IV-Child Version, Parent Report. b CSR  =  Clinical Severity Rating. c SMQ  =  Selective Mutism Questionnaire. e DBDRS  =  Disruptive Behavior Disorder Rating Scales.
* 𝑃 < . 0 0 1 4 .