Is breast cancer prognosis inherited?

Breast Cancer Research

Table 1 Characteristics of 2,787 mother-daughter pairs and 831 sister pairs with primary breast cancer in Sweden from 1961 to 2001

	Mother		Daughter		Older sister		Younger sister
	Number	Percentage	Number	Percentage	Number	Percentage	Number	Percentage
Number	2,787		2,787		831		831
Overall deaths	2,010	72.1	511	18.3	182	21.9	148	17.8
Cause-specific deaths	1,009	36.2	395	14.2	133	15.9	120	14.4
Age at diagnosis (years)
<40	56	1.9	417	14.4	63	7.6	117	14.1
40–49	305	10.6	1,148	39.8	264	31.8	346	41.6
50–59	560	19.4	1,033	35.8	354	42.6	313	37.7
60–69	826	28.6	288	10.0	150	18.0	55	6.6
70+	1,139	39.5	0	-	0	-	0	-
Median age at diagnosis (years)	66		49		49		48
Year of diagnosis
1961–1969	443	15.9	9	0.3	2	0.2	0	-
1970–1979	714	25.6	88	3.2	49	5.9	27	3.3
1980–1989	852	30.6	601	21.6	222	26.7	160	19.2
1990-	778	27.9	2,089	74.9	558	67.2	644	77.5
Parity
Nulliparous/missing			421	15.1			107	12.9
1			493	17.7			124	14.9
2			1,221	43.8			381	45.9
3+			652	23.4			219	26.3
Median age at first birth (years)			25				24

ISSN: 1465-542X