Table 1.

Gender, age, and diagnoses of SPD and ASD groups: percentage, valid N, and T-tests between groups.

Demographic	SPD % (N = 998)	ASD % (N = 465)	t (p)
GENDER
Male	73.2	82.6	−4.147 (<0.001)
Female	26.8	17.4	4.147 (<0.001)
AGE
0–3	1.1	26.8	−12.367 (<0.001)
4–12	97.8	67.7	13.541 (<0.001)
13–17	1.1	5.4	−4.951 (<0.001)
PARENT REPORTED DIAGNOSES
ADD/ADHD	17	12	2.314 (0.015)
Tourettes	0	0.9	−2.939 (0.045)
Anxiety	3	8	−4.642 (<0.001)
Cognitive delay	0.3	4	−5.393 (<0.001)
Emotional problems	0.2	1	−1.842 (0.066)
Learning disability	2	3	−1.187 (0.235)
Non-verbal learning disability	3	5	−1.657 (0.098)
Other diagnoses	15	16	−0.718 (0.473)