Table 2 Personal and clinical characteristics of patients carrying or not BRCA1/2 mutations
Variable | BRCA1/2+ | BRCA1/2− | p value |
|---|---|---|---|
Family history | Â | Â | Â |
 No | 1(9.1 %) | 5 (17.2 %) | 0.66 |
 Yes | 10 (90.9 %) | 24 (82.8 %) |  |
Mean age at diagnosis (years) | 37.90 (SDÂ =Â 6.67) | 44.48 (SDÂ =Â 9.74) | 0.05 |
Mean age at menarche (years) | 13.08 (SDÂ =Â 1.60) | 14.24 (SDÂ =Â 1.62) | 0.05 |
Mean age at first delivery (years) | 25.15 (SDÂ =Â 5.76) | 25.57 (SDÂ =Â 6.60) | 0.88 |
Mean age at menopause (years) | 47.50 (SDÂ =Â 0.70) | 48.66 (SDÂ =Â 5.60) | 0.79 |
Breastfeeding | |||
 No | 4 (36.4 %) | 12 (41.4 %) | 1.00 |
 Yes | 7 (63.6 %) | 17 (58.6 %) |  |
Average duration of breastfeeding (months) | 8.71 (SDÂ =Â 5.40) | 19.35 (SDÂ =Â 12.92) | 0.05 |
Oral contraceptive use | |||
 No | 6 (54.5 %) | 11 (37.9 %) | 0.48 |
 Yes | 5 (45.5 %) | 18 (62.1 %) |  |
Parity | |||
 Nulliparous | 4 (36.4 %) | 10 (34.5 %) | 1.00 |
 Parous | 7 (63.6 %) | 19 (65.5 %) |  |
Tumor localization | |||
 Unilateral | 10 (90.9 %) | 28 (96.6 %) | 1.00 |
 Bilateral | 1 (9.1 %) | 1 (3.4 %) |  |