Table 3. 10-year survival for women aged 50–64 years with symptomatic and screen-detected invasive breast tumours by a combination of tumour size and nodal status.

			Screen detected
	Symptomatic			10-year survival (%)
Size (mm) and node status	N (%)	10-year survival (%)	N (%)	Unadjusted for lead time	Difference from symptomatic	Adjusted for lead time	Difference from symptomatic
<11, Negative	564 (7.2)	93.2	1505 (25.3)	95.1	1.9	91.5	−1.7
11–20, Negative	2008 (25.7)	84.1	2178 (36.6)	91.9	7.8	84.5	0.4
21–30, Negative	1073 (13.7)	74.8	521 (8.8)	85.0	10.2	76.3	1.5
31–50, Negative	433 (5.5)	59.8	135 (2.3)	77.7	17.9	68.8	9.0
51+, Negative	116 (1.5)	46.3	28 (0.5)	56.2	9.9	54.1	7.8
<11, Positive	167 (2.1)	62.4	162 (2.7)	85.7	23.3	80.4	18.0
11<21, Positive	1089 (13.9)	62.7	769 (12.9)	73.9	11.2	62.9	0.2
21<31, Positive	1135 (14.5)	47.6	403 (6.8)	64.4	16.8	56.3	8.7
31<51, Positive	835 (10.7)	36.5	196 (3.3)	51.4	14.9	38.8	2.3
51+, Positive	393 (5.0)	26.1	55 (0.9)	32.7	6.6	29.6	3.5
Overall	7813 (100.0)	64.9	5952 (100.0)	85.0	20.1	77.4	12.5