Table 1.

Demographic and clinical characteristics of patients (n = 229) that were enrolled in a study to investigate whether the presence of aldehyde dehydrogenase 1 in axillary lymph node metastases in patients with breast cancer was associated with clinical prognosis.

Characteristic	Study cohort n = 229
Age
≤50 years	118
>50 years	111
Pathology
Size of tumour ≤2 cm	48
Size of tumour >2 cm and ≤5 cm	147
Size of tumour >5 cm	34
Histology
ER positive	159
ER negative	67
PR positive	158
PR negative	68
HER-2 positive	53
HER-2 negative	173
Lack of ER, PR and HER-2 data	3
Outcome
Distant metastasis	80
Death	60

Data presented as n of patients.

ER, oestrogen receptor; PR, progesterone receptor; HER-2, human epidermal growth factor receptor 2.