Table 3.

Mean difference in brain age delta [years] and effect sizes (d) for nulliparous (N = 2453) versus parous (N = 9568) women without any correction (M0), and after applying correction method 1/2 and 3.

M	Mean diff	t	p	Effect size (d)	Error
0	2.28	17.54	< 0.001	0.40	0.02
1/2	1.80	8.45	< 0.001	0.19	0.02
3	0.57	8.45	< 0.001	0.19	0.02