Table 1. Frequency of treatment received in the study.

Treatment	N (%)
Chemotherapy
No	1471 (82.3)
Yes	316 (17.7)
Endocrine treatment
No	1112 (62.2)
Yes	675 (37.8)
Endocrine and chemotherapy
No	816 (45.7)
Yes	971 (54.3)

Abbreviations: N=number of cases; No=did not receive the treatment; Yes=received treatment.

According to the protocol used during the time of this study cohort, patients with oestrogen receptor-positive tumours were not offered systemic therapy, if their Nottingham Prognostic Index score was ≤3.4, and therefore received no adjuvant therapy.