Table 2: Association between selected breast cancer risk factors and invasive breast cancer ER subtypes, an Uganda study 2012.

Characteristics ER positive
(%)
ER negative
(%)
-value

Age
5037 (70)33 (55)
 >50 16 (30)27 (45)0.106
Setting
 Rural31 (60)31 (52)
 Urban 21 (40)29 (48)0.399
BMI
 1 (normal)19 (36)26 (43)
 2 (underweight)1 (2)1 (2)
 316 (30)13 (22)
 417 (32)20 (33)0.750
Parity
 Nulliparous4 (8) 2 (3.)
 1–322 (42)20 (33)
 4–618 (34)18 (30)
79 (17)20 (33)0.211
AFB
 0 (<20 years) 23 (50)29 (55)
 1 (20–24 years) 12 (26)17 (32)
 2 (25–30 years)7 (15)6 (11)
 3 (>30 years)4 (9)1 (2)0.399
Breastfeeding**
 Yes 39 (75)46 (78)
 No13 (25)13 (22)0.713
Contraceptive use00
 Yes 45 (90)55 (92)
 No5 (10)5 (8)0.762

1 missing value.
** −1 missing values.
003 missing values.
AFB: Age at first birth.