TABLE 2.

Parametric coefficients and approximate complexity and significance of smooth terms for the fitted GAM model to SCQ total score.

Sample A ‐ SCQ Lifetime
Fixed factor	β	SE	p
Intercept	16.529	1.778	<2e‐16***
Diagnosis	−15.114	0.995	<2e‐16***
Neurotypical	−1.204	0.963	0.213
Gender girl verbal	5.895	1.929	0.003**
Smooth term		Estimated degrees of freedom	p
s(AGE)		1.000	0.239
s(AGE):Diagnosis ASD		1.000	0.259
s(AGE):Diagnosis neurotypical		7.373e‐05	0.995
s(AGE):Gender boy		1.000	0.539
s(AGE):Gender girl		2.728e‐06	1.000
s(AGE):Non‐verbal		1.628e‐04	0.998
s(AGE):Verbal		1.000	0.109

Sample B ‐ SCQ Current
Fixed factor	β	SE	p
Intercept	17.083	1.604	<2e‐16***
Diagnosis neurotypical	−10.796	0.738	<2e‐16***
Gender girl	−0.120	0.685	0.861
Verbal	−1.216	1.720	0.481
Smooth term		Estimated degrees of freedom	p
s(AGE)		1.000	0.0041*
s(AGE):Diagnosis ASD		1.533	0.181
s(AGE):Diagnosis neurotypical		1.000	0.420
s(AGE):GENDER BOY		1.2243–04	0.997
s(AGE):Gender girl		2.825	0.256
s(AGE):Non‐verbal		1.000	0.999
s(AGE):Verbal		2.145e‐05	0.999