Table 1.

Results from the group classification and brain age prediction, including correlation analyses and logistic regression

	Pearson’s r			Logistic regression
	r	p	95% CI	β	SE	z	p
Classifier probability score and no. of childbirths	−0.02*	0.45*	−0.05, 0.02*	2.19	0.73	3.01	$2.61\times 10^{-3}$
Brain age gap and no. of childbirths	−0.07	$5.00\times 10^{-16}$	−0.09, −0.06	−0.06	0.01	−8.22	$2.07\times 10^{-16}$

SE, standard error. Number of women with >1 birth = 9,568, nulliparous women = 2,453.

^*within parous group