Table 4.

Adjusted relative risk (95% confidence interval) of dying according to age at diagnosis and treatment in node negative women and women with tumour size ⩽2 cm and >2 cm

Age at diagnosis (years)	Node negative*			Tumour size ⩽2 cm			Tumour size >2 cm
	No adjuvant treatment	Adjuvant cytotoxic treatment		No adjuvant treatment	Adjuvant cytotoxic treatment		No adjuvant treatment	Adjuvant cytotoxic treatment
<35	2.1 (1.6 to 2.8)	0.6 (0.1 to 5.5)		2.8 (1.9 to 4.0)	1.3 (0.9 to 2.1)		1.5 (1.0 to 2.4)	1.2 (0.9 to 1.6)
35-39	1.4 (1.1 to 1.7)	0.9 (0.3 to 3.5)		1.4 (1.0 to 1.9)	1.3 (0.9 to 1.9)		1.4 (1.0 to 2.0)	1.3 (1.0 to 1.6)
40-44	1.1 (0.9 to 1.4)	0.7 (0.2 to 2.3)		1.1 (0.8 to 1.5)	1.1 (0.8 to 1.5)		1.1 (0.8 to 1.5)	1.1 (0.9 to 1.3)
45-49†	1	1		1	1		1	1

^*Only node negative women were considered in the analysis as all node positive women received adjuvant cytotoxic treatment. 

^†Reference group.