Table 1.

Socio-demographic characteristics and anthropometric measurements among DDM participants by menopausal status

	Post-menopausal (N = 2,754)	Pre-menopausal (N = 820)	P value
Age (mean, SD)	58 (4.5)	49 (2.9)	<0.001
Parity, N (%)			<0.001
Nuliparous	237 (8.6)	85 (10.4)
One	371 (13.5)	174 (21.2)
Two	1298 (47.1)	418 (50.9)
Three	603 (21.9)	114 (13.9)
Four or more	245 (8.9)	29 (3.5)
First-degree relative with breast cancer, N (%)	202 (7.3)	58 (7.1)	0.800
Hormonal replacement therapy, N (%)			<0.001
No	2402 (87.2)	812 (99.0)
Current use	82 (3.0)	7 (0.9)
Past use	270 (9.8)	1 (0.1)
Years since menopause, N (%)
<5 years	748 (27.2)
5–10	867 (31.5)
10–15	663 (24.1)
>15	476 (17.3)
Bra size, N (%)			<0.001
80–85	297 (10.8)	121 (14.8)
90	480 (17.4)	178 (21.7)
95	786 (28.5)	229 (27.9)
100	508 (18.5)	151(18.4)
105	353 (12.8)	75 (9.2)
110	200 (7.3)	44 (5.4)
115–120	115 (4.2)	20 (2.4)
Unknown	15 (0.5)	2 (0.2)
Anthropometric variables
BMI (mean, SD)	28.3 (5.0)	27.0 (4.9)	<0.001
Waist (mean, SD)	88.6 (11.6)	84.8 (11.7)	<0.001
Hip (mean, SD)	105.2 (9.6)	103.6 (9.6)	<0.001
Height (mean, SD)	156.3 (5.9)	158.2 (5.7)	<0.001
Waist-to-hip ratio (mean, SD)	0.84 (0.07)	0.82 (0.07)	<0.001
Waist-to-height ratio (mean, SD)	0.57 (0.08)	0.54 (0.08)	<0.001
Weight at age 18 (mean, SD)	52.7 (7.9)	52.9 (7.2)	0.529
Current Weight (mean, SD)	69.2 (12.3)	67.5 (12.4)	0.001
Weight gain (kg) since age 18 (mean, SD)	16.1 (12.2)	14.1 (11.0)	<0.001
Mammographic density, N (%)			<0.001
A: 0 %	141 (5.1)	10 (1.2)
B: <10 %	626 (22.7)	98 (12.0)
C: 10–25 %	625 (22.7)	108 (13.2)
D: 25–50 %	870 (31.6)	269 (32.8)
E: 50–75 %	375 (13.6)	249 (30.4)
F: >75 %	106 (3.9)	81 (9.9)
Not available	11 (0.4)	5 (0.6)