Erratum to: PREDICT: a new UK prognostic model that predicts survival following surgery for invasive breast cancer

Table 1 Patient characteristics for model development (ECRIC) and validation (WMCIU) cohorts

	ECRIC		WMCIU
Total Number of Subjects	5,694		5,468
Total time at risk (years)	31,904		25,917
Median follow-up (years)*	5.65	(0.04-8.00)^†	4.85	(0.07-8.00)^†
Number of breast cancer deaths	737		668
Number of other deaths	338		287
Annual breast cancer mortality rate	0.023	(0.021-0.025)^‡	0.026	(0.024-0.028)^‡
5-year breast cancer survival rate	0.89	(0.88-0.90)^‡	0.88	(0.87-0.89)^‡
Median age at diagnosis, years	58	(23-95)^†	58	(22-93)^†
	Number	%	Number	%
Age, years
<35	111	2	108	2
35-49	1,172	21	1,195	22
50-64	2,630	46	2,393	44
65-74	1,124	20	1,101	20
75+	657	12	671	12
Nodal status
0	3,532	62	3,184	58
1	741	13	746	14
2-4	806	14	792	14
5-9	380	7	451	8
10+	235	4	295	5
Tumour size, mm
<10	625	11	485	9
10-19	2,310	41	2,136	39
20-29	1,627	29	1,566	29
30-49	845	15	923	17
50+	287	5	358	7
Grade
I	1,005	18	1,017	19
II	2,927	51	2,442	45
III	1,762	31	2,009	37
ER Status
ER negative	991	17	1,116	20
ER positive	4,703	83	4,352	80
Adjuvant therapy
None	643	11	1,520	28
Chemotherapy only	783	14	1,542	28
Endocrine therapy	3,146	55	1,827	33
Combined chemoendocrine	1,122	20	579	11
Screen detected
Yes	1,621	28	1,256	23
No	4,073	72	4,212	77

ISSN: 1465-542X