Difference in Risk Factors for Breast Cancer by ER Status in an Indigenous African Population

Table 1

Tumor characteristics for the ER+/− cancer subtypes among women with invasive breast cancer, an Ugandan 2012 study.

Characteristics	ER positive; 𝑛 (%) 53 (47%)	ER negative; 𝑛 (%) 60 (53%)	𝑃-value
Age
≤50	37 (70)	33 (55)
>50	16 (30)	27 (45)	0.106
Setting^†
Rural	31 (60)	31 (52)
Urban	21 (40)	29 (48)	0.399
Stage*
I & II	11 (21)	11 (19)
III & IV	41 (79)	46 (81)	0.809
Tumor Grade**
I	8 (15)	1 (2)
II	22 (42)	8 (13)
III	22 (42)	51 (85)	0.001
Histological types
Ductal	47 (89)	59 (98)
Others	6 (11)	1 (2)	0.034

†1 missing value.
*4 missing values.
**1 missing value.