Psychophysiological mechanisms underlying the failure to speak: a comparison between children with selective mutism and social anxiety disorder on autonomic arousal

Table 1 Sample characteristics

	SM	SAD	TD	P	Post-hoc
n	31	32	33
Age	9.07 (1.15)	9.50 (1.19)	9.79 (1.41)	0.075	–
Gender (f/m)	19/12	18/14	18/15	0.889	–
FSSM-DS	7.71 (1.66)	4.44 (2.59)	0.70 (1.21)	< 0.000	SM > SAD > TD
FSSM-SS (z-score)	0.63 (.89)	0.23 (0.70)	− 0.81 (0.28)	< 0.000	SM > SAD > TD
SPAI-C sum score	18.86 (9.42)	18.92 (10.12)	9.24 (5.97)	< 0.000	SM = SAD > TD
RIBI sum score	39.06 (13.59)	41.91 (15.99)	23.84 (12.86)	< 0.000	SM = SAD > TD
Number of words	93.09 (86.43)	155.00 (65.46)	217.76 (81.55)	< 0.000	SM < SAD < TD

FSSM-DS Frankfurt Scale of Selective Mutism-Diagnostic Scale, FSSM-SS Frankfurt Scale of Selective Mutism-Severity Scale, SPAI-C social phobia and anxiety inventory for children, RIBI Retrospective Infant Behavioral Inhibition Scale, SM selective mutism, SAD social anxiety disorder, TD typical development

ISSN: 1753-2000