Table 3. Auxological parameters.

	Total sample	Experimental Groups
		ASD-seizures	ASD-EEG	ASD “simplex”	Effect size	Test	p
Tall Stature (>1.5 SDS) *
Yes	33 (17.4%)	10 (30.3%)	19 (57.6%)	4 (12.1%)	Φc = 0.236	χ2 = 10.590	0.005 *
No	157 (82.6%)	44 (28%)	51 (32.5%)	62 (39.5%)
Macrocephaly
Yes	53 (27.9%)	18 (34%)	21 (39.6%)	14 (26.4%)	Φc = 0.120	χ2 = 2.756	0.252
No	137 (72.1%)	35 (25.5%)	49 (35.8%)	53 (38.7%)
Auxological Category**
AUX1	119 (63.6%)	33 (27.7%)	36 (30.3%)	50 (42%)	Φc = 0.333	χ2 = 20.680	0.002**
AUX2	35 (18.7%)	10 (28.6%)	14 (40%)	11 (31.4%)
AUX3	17 (9.1%)	8 (47.1%)	6 (35.3%)	3 (17.6%)
AUX4	16 (8.6%)	2 (12.5%)	13 (81.2%)	1 (6.2%)

AUX1: Normal head circumference and height; AUX2: Isolated Macrocephaly; AUX3: Macrocephaly and Tall Stature; AUX4: Isolated Tall Stature.

^*Tall Stature is strongly unrelated to the ASD “simplex” group, and is associated with the ASD-EEG group (see CA in Table S5 in Supporting Information S1). **Isolated Tall Stature (AUX4) is associated with EEG abnormalities; concurrence of Tall Stature and Macrocephaly (AUX3) is associated to seizures; Isolated Macrocephaly (AUX 2) is equally distributed among groups (see CA in Table S6 in Supporting Information S1).

Φc =  Cramers’ phi coefficient, χ2 = the Pearson chi-squared test.