Table 2. Number (N) and age-standardised incidence rates of breast cancer per 100 000 women-years for female cancer survivorsa.

	1970s		1990s
Period of first primary cancer diagnosis	N	Incidence (100 000)	N	Incidence (100 000)	Rate ratiob	(95% CI)
Type of first primary cancer c
Breast cancer	77	839	127	999	1.19	0.91–1.60
Non-breast cancer	23	228	55	387	1.41	1.04–2.75
Treatment of first primary cancer c
Surgery	39	451	74	634	1.41	0.95–2.08
Radiotherapy±surgery	48	625	64	851	1.36	0.94–1.98
Systemic therapy±surgery	5	371	15	520	1.40	0.48–3.75
Radiotherapy+systemic therapy±surgery	7	702	25	613	0.87	0.39–2.10
No therapy	1	157	4	531	3.38	0.40–31.69
Incidence rates (only age adjusted)c	100	519	182	676	1.30	1.03–1.68
Incidence rates (age, type of first cancer and treatment of first cancer adjusted)	100	475	182	676	1.42	1.11–1.83

N indicates number of cases.

^aFemale cancer survivors are both breast cancer and non-breast cancer survivors.

^bRate ratio compares incidence rate in 1990s with incidence rate in 1970s.

^cAge adjusted.