No Excess Mortality in Patients Aged 50 Years and Older Who Received Treatment for Ductal Carcinoma In Situ of the Breast

Table 3

Mortality (10 years) of the surgically treated patients with DCIS as compared to the general population according to age, stratified by treatment.

Treatment	Mortality	<50 years	50–64 years	65–75 years	>75 years	Overall
BCS+RT	Observed	7	34	52	24	117
	Expected	5.2	47.5	67.4	26.9	147
	Relative mortality	1.4	0.7	0.8	0.9	0.8*
BCS-RT	Observed	6	36	57	71	170
	Expected	3.8	29.4	49.6	74.5	157.3
	Relative mortality	1.6	1.2	1.1	1.0	1.1
MAST	Observed	29	61	100	119	309
	Expected	11.1	63.3	102.2	131.0	307.5
	Relative mortality	2.6***	1.0	1.0	0.9	1.0
Overall	Observed	44	156	233	271	704
	Expected	21.6	154.6	243.7	272.2	692.1
	Relative mortality	2.0***	1.0	1.0	1.0	1.0

^∗𝑃<0.05, ^∗∗𝑃<0.01, ^∗∗∗𝑃<0.001. Median follow-up: 5.9 years (range 1.2–10.9).