Table 2.

Results from Multiple Adaptive Regression Splines analyses: Age-dependent effects on redox states.

Redox variable	MARS hinge function(s)	Coefficient	p-value	GCV*	R2
GSSG	h(Age-8)	0.398	7.36E-04	0.931	0.183
	h(Age-11)	−0.513
EhGSSG	h(Age-4)	0.108	8.69E-04	0.915	0.147
EhCySS	h(Age-4)	−0.389	2.18E-02	0.95	0.215
	h(Age-10)	−1.259	5.30E-04
	h(Age-11)	1.726	1.20E-03

^⁎GCV=Generalized cross validation.