TABLE 1.

Summary of participant characteristics in the three groups.

Characteristics	ASD (n = 143)	TDC (n = 113)	TDA (n = 43)	P-value
Male gender, no. (%)	126 (88)	91 (81)	20 (47)	0.12
Age (SD) [range], y	5.37 (0.74) [4.0–6.8]	5.54 (0.75) [4.0–6.8]	25.44 (2.62) [19.2–31.4]	0.12
SRS T-score (SD) [range]	76.44 (12.50) [43–108]	48.73 (5.67) [36–59]	−	<0.001***
ADI-R score (SD) [range]
Reciprocal social interaction	19 (5.0) [8–29]	−	−	−
Communication				−
Non-verbal	10.9 (2.7) [5–14]
Verbal	16.1 (3.4) [7–23]
Repetitive behaviors	5.0 (2.5) [0–11]			−
Diagnosis at or before 36 months	4.1 (1.1) [1–5]
AQ score (SD) [range]	−	−	19.23 (6.10) [9–31]

***Indicates significant difference (p < 0.001).