Table 1.

Distribution of the characteristics included in the profile 1: overall population of women and focus on the families of community combinations statistically associated with BC. See Section 3.4 for the description of the communities and the families.

	Women Belonging to Other Families	Fuchsia Family	Yellow Family	Green Family	Chi-Square Test	All Women
Number of women	3247	1299	889	166		5601
BC prevalence [95% CI]	1.6% [1.2–2.1%]	2.5% [1.7–3.5%] (b)	0.9% [0.5–1.8%] (a)	4.2% [2.0–8.4%] (b)	p = 0.004	1.8% [1.5–2.2%]
Years of age (avg ± SD) focus on age classes	58.7 (±7.4); > 65 * (b)	64.5 (±6.9); 60–64 ** (a); >65 ** (b)	56.2 (±5.2); 50–54 **; 55–59 **; 60–64 * (b)	61.3 (±9.4); 45–49 **; 55–59 *; >65 **	p < 0.001	59.7 (±7.6)
Breast density:					p < 0.001
BI-RADS A (less dense)	14.6% *	28.6% **	7.3% *	21.7%		16.9%
BI-RADS B	37.1%	45.7% **	27.7% *	45.8% **		37.9%
BI-RADS C	36.8% **	23.9% *	46.5% **	25.9% *		35.0%
BI-RADS D	11.5% **	1.7% *	18.6% **	6.6%		10.2%
Family history of BC:					p < 0.001
no first line relatives	72.5% *	78.6% **	69.4% *	76.5%		73.5%
first line female relatives	25.5%	21.4% *	29.7% **	23.5%		25.2%
first line male relatives	0.5%	0.0% *	0.9% ** (b)	0.0%		0.4%
first line male and female rel.	1.5%	0.0%	0.0%	0.0%		0.9%
Menarche age (avg. years ± SD)	12.6 (±1.4)	12.4 (±1.4)	12.7 (±1.4)	12.8 (±1.5)		12.6 (±1.4)
Reproductive period length	37.4 (±4.2)	38.8 (±3.9)	37.7 (±3.3)	32.1 (±3.4)		37.6 (±4.1)
Menopause (avg. years ± SD). Focus on length classes	8.6 (±7.3) ≤5 **; >5 *	13.3 (±7.7) ≤5 *; >5 **	5.9 (±5.7); ≤5 ** (a); >5 * (b)	16.5 (±10.2) ≤5 *; >5 **	p < 0.001	9.5 (±7.7)

Association between each risk factor and family (chi-square test p < 0.05): * negative (adj. residual < −2); ** positive (adj. residual > 2); Association between BC cases and each risk factor by family (chi-square test p < 0.05): (a) negative (adj. residual < −2); (b) positive (adj. residual > 2).