Table 3.

GAMM regression table for age, sex, and interactions

Region	Term	Statistic	p
Globus pallidus	Sex	t = −1.3	0.207
	s(Age)	F = 76.7	< 0.0001*
	s(Age):Sex	F = 4.6	0.003*
Nucleus accumbens	Sex	t = 2.3	0.024
	s(Age)	F = 41.8	< 0.0001*
Putamen	Sex	t = −0.9	0.349
	s(Age)	F = 85.8	< 0.0001*
Caudate	Sex	t = 1.8	0.068
	s(Age)	F = 9.8	< 0.0001*

Interaction effects are reported only when the interaction is significant after Bonferroni multiple-comparisons correction. Statistics are reported as t statistics for parametric terms and F statistics for smooth terms.

*p-value is significant at the Bonferroni-adjusted α of 0.0125.