Table 4.

Comparison of the three autistic severity groups based on the Catatonia Spectrum (CS) total score within each diagnostic subgroups.

Diagnostic subgroups	Non-AT (a) (mean ± SD)	AT (b) (mean ± SD)	ASD (c) (mean ± SD)	F	p	Post-hoc comparisons (p < 0.05)
HC	15.66 ± 9.45	24.81 ± 7.19	50.14 ± 15.14	52.33	<0.001	a < b < c
MDD	17.32 ± 11.66	30.23 ± 11.64	46.43 ± 14.66	59.88	<0.001	a < b < c
BPD	17.00 ± 10.15	32.59 ± 12.12	47.71 ± 11.49	34.75	<0.001	a < b < c
CTN	22.03 ± 13.77	36.89 ± 13.48	47.97 ± 11.85	30.45	<0.001	a < b < c

Abbreviations: ASD, autism spectrum disorder; AT, autistic traits; Non-AT, non autistic traits; BPD, borderline personality disorder; HC, healthy control; MDD, major depressive disorder; CTN, catatonia.