Table 3.

Variable importance rankings of Lasso and XGB models.

Rank	Variable	Lasso Method	Variable	XGB Method
1	X7	Breast self-examination	X1	Age
2	X8	Mammography within 2 years	X7	Breast self-examination
3	X15	Duration of hormone replacement therapy	X10	Age at first childbirth
4	X6	Major diseases	X11	Parity
5	X10	Age at first childbirth	X8	Mammography within 2 years
6	X16	Age at starting oral contraceptives	X6	Major diseases
7	X14	Age at starting hormone replacement therapy	X5	Education level
8	X17	Duration of oral contraceptive use	X4	Body mass index
9	X9	History of breast surgery	X16	Age at starting oral contraceptives
10	X1	Age	X13	Reproductive lifespan
11	X12	Breastfeeding	X2	Body height
12	X18	Number of relatives with confirmed breast cancer	X14	Age at starting hormone replacement therapy
13	X5	Education level	X12	Breastfeeding
14	X11	Parity	X18	Number of relatives with confirmed breast cancer
15	X13	Reproductive lifespan	X3	Age at menarche
16	X3	Age at menarche	X9	History of breast surgery
17	X4	Body mass index	X17	Duration of oral contraceptive use
18	X2	Body height	X15	Duration of hormone replacement therapy