Variable | Luminal A (n = 158) | Triple-negative (n = 65) | p value^ | ||
---|---|---|---|---|---|
n | % | n | % | ||
Age at diagnosis | |||||
mean (range) | 53.9 | 29–82 | 52.7 | 35–76 | 0.34# |
29–55 | 86 | 54.4 | 46 | 70.8 | 0.04 |
56–82 | 72 | 45.6 | 19 | 29.2 | |
Smoking | |||||
Never | 90 | 57.3 | 39 | 60.9 | 0.77 |
Former | 50 | 31.8 | 20 | 31.3 | |
Current | 17 | 10.8 | 5 | 7.8 | |
Missing* | 1 | 1 | |||
BMI (kg/m2) | |||||
18.7–< 25 | 34 | 21.7 | 15 | 23.1 | 0.05 |
25–29 | 42 | 26.8 | 27 | 41.5 | |
≥ 30–57.1 | 81 | 51.6 | 23 | 35.4 | |
Missing | 1 | 1 | |||
Age at menarche | |||||
< 12 | 51 | 32.3 | 25 | 38.5 | 0.57 |
12–13 | 90 | 57 | 32 | 49.2 | |
≥ 14 | 17 | 10.8 | 8 | 12.3 | |
Parity | |||||
Nulliparous | 30 | 19 | 9 | 13.8 | 0.47 |
Parous | 128 | 81 | 56 | 86.2 | |
Live births | |||||
Nulliparous | 30 | 19 | 9 | 13.8 | 0.17 |
1 | 43 | 27.2 | 15 | 23.1 | |
2 | 46 | 29.1 | 29 | 44.6 | |
3+ | 39 | 24.7 | 12 | 18.5 | |
Age at first birth (among parous) | |||||
< 20 years | 38 | 30.2 | 14 | 25 | 0.65 |
20–24 years | 35 | 27.8 | 19 | 33.9 | |
≥ 25 years | 53 | 42.1 | 23 | 41.1 | |
Missing | 2 | 0 | |||
Years since last birth (among parous) | |||||
< 5 years | 3 | 2.4 | 0 | 0 | 0.27** |
5–9 years | 10 | 8 | 3 | 5.4 | |
10–14 years | 9 | 7.2 | 8 | 14.3 | |
15–19 years | 17 | 13.6 | 4 | 7.1 | |
20+ years | 86 | 68.8 | 41 | 73.2 | |
Missing | 3 | 0 | |||
Breastfeeding (among parous) | |||||
Never | 64 | 50.8 | 24 | 43.6 | 0.3 |
Ever | 62 | 49.2 | 31 | 56.4 | |
Missing | 2 | 1 | |||
Menopausal status | |||||
Pre-menopausal | 60 | 38 | 26 | 40 | 1 |
Post-menopausal | 81 | 51.3 | 27 | 41.5 | |
Unknown | 17 | 10.8 | 12 | 18.5 | |
Age at menopause (among post-menopausal) | |||||
< 50 | 47 | 48 | 14 | 35.9 | 0.83 |
≥ 50 | 33 | 33.7 | 12 | 30.8 | |
Unknown | 18 | 18.4 | 13 | 33.3 | |
History of benign breast disease | |||||
No | 101 | 63.9 | 39 | 60 | 0.69 |
Yes | 57 | 36.1 | 26 | 40 | |
First degree family history of breast cancer | |||||
No | 134 | 84.8 | 57 | 87.7 | 0.73 |
Yes | 24 | 15.2 | 8 | 12.3 | |
Tumor size | |||||
≤ 2 cm | 119 | 77.3 | 34 | 54 | 0.001 |
> 2 cm | 35 | 22.7 | 29 | 46 | |
Missing | 4 | 2 | |||
Tumor grade | |||||
Well/moderately differentiated | 122 | 79.7 | 9 | 14.5 | < 0.001** |
Poorly differentiated | 31 | 20.3 | 53 | 85.5 | |
Missing | 5 | 3 | |||
Lymph node invasion | |||||
Negative | 98 | 65.3 | 37 | 63.8 | 0.96 |
Positive | 52 | 34.7 | 21 | 36.2 | |
missing | 8 | 7 |