Table 1. Patient characteristics at the time of diagnosis according to histopathological types.

IDC: invasive ductal carcinoma; ILC: invasive lobular carcinoma; DCIS: ductal carcinoma in situ; IMC: invasive mixt carcinoma; OCS: oral contraceptives; HRT: hormone replacement therapy.

	Mean (standard deviation)
	IDC	ILC	DCIS	IMC	Others	Total
Diagnosis age (years)	54.8 (13.1)	59.6 (14.8)	54.8 (14.3)	54.2 (16.1)	55.9 (14.3)	55.1 (13.5)
Menarche age (years)	13.1 (1.2)	13.1 (1.3)	13.1 (1.4)	13.2 (1.3)	13.0 (1.3)	13.1 (1.3)
Menopause (years)	47.8 (4.8)	48.3 (4.8)	48.5 (4.0)	47.2 (6.1)	47.7 (5.9)	47.9 (4.9)
Gravida	2.3 (1.7)	2.4 (1.4)	2.0 (1.3)	2.3 (1.9)	2.15 (1.6)	2.27 (1.7)
Parity	1.9 (1.4)	1.8 (0.9)	1.8 (1.2)	1.8 (1.4)	1.9 (1.5)	1.9 (1.3)
Abortion	0.2 (0.6)	0.2 (0.6)	0.1 (0.3)	0.1 (0.4)	0.1 (0.4)	0.2 (0.5)
Age at first birth (years)	24.6 (5.6)	27.0 (5.5)	25.0 (3.5)	23.5 (4.1)	25.3 (5.7)	24.8 (5.4)
Lactation length (months)	20.2 (23.7)	18.0 (13.4)	16.6 (21.5)	14.1 (17.7)	20.4 (24.1)	19.6 (22.9)
	n (%)
Age groups (years)
<40	112 (14.0)	5 (8.3)	13 (16.7)	12 (28.6)	16 (14.7)	158 (14.5)
40-49	201 (25.1)	13 (21.7)	17 (21.8)	4 (9.5)	27 (24.8)	262 (24.0)
50-59	210 (26.2)	15 (25.0)	22 (28.2)	10 (23.8)	26 (23.9)	283 (25.9)
60-69	163 (20.3)	13 (21.7)	13 (16.7)	9 (21.4)	21 (19.3)	219 (20.1)
70-79	82 (10.2)	7 (11.7)	10 (12.8)	5 (11.9)	10 (8.7)	114 (10.4)
≥80	34 (4.2)	7 (11.7)	3 (3.8)	2 (4.8)	9 (8.3)	55 (5.0)
Total	802 (73.5)	60 (5.5)	78 (7.1)	42 (3.8)	109 (10.0)	1.091 (100)
OCS/HRT	88 (11.0)	5 (8.3)	6 (7.7)	2 (4.8)	9 (8.3)	110 (10.1)
Benign breast diseases	71 (8.9)	3 (5.0)	15 (19.2)	5 (11.9)	8 (7.3)	102 (9.3)
Breast cancer history	4 (0.5)	0 (0.0)	1 (1.3)	0 (0.0)	3 (1.8)	7 (0.6)
Family history of breast cancer	187 (23.3)	18 (30.0)	21 (26.9)	4 (9.5)	19 (17.4)	249 (22.8)
Stages
0			78 (100)		1 (0.9)	79 (7.2)
1	222 (27.7)	15 (25.0)		11 (26.2)	51 (46.8)	299 (27.5)
2	366 (45.6)	30 (50.0)		19 (45.2)	31 (28.4)	446 (40.9)
3	158 (19.7)	11 (18.3)		10 (23.8)	10 (9.2)	189 (17.3)
4	56 (7.0)	4 (6.7)		2 (4.8)	16 (14.7)	78 (7.1)