Table 1

Patient and tumour characteristics by period of diagnosis among patients aged 60–64 years1

Patient and tumour characteristics

1975–1979 1985–1989 N = 218 (%)

1997–2000 2001–2003 N = 389 (%)

P value for X2 of heterogeneity


Social class2

High

8 (6%)

72 (19%)

P < 0.0000

Medium

57 (44%)

203 (52%)

Low

26 (20%)

53 (14%)

Unknown

39 (30%)

61 (16%)

Method of detection

Screening

31 (14%)

199 (51%)

P < 0.0000

Other

187 (86%)

190 (49%)

Stage at diagnosis

I

69 (32%)

186 (48%)

P < 0.0000

II

95 (44%)

149 (38%)

III and more

34 (16%)

42 (11%)

Unknown

20 (09%)

12 (3%)

Oestrogen 3 receptors

Positive

43 (61%)

311 (80%)

P = 0.002

Negative

18 (25%)

53 (14%)

Unknown

10 (14%)

25 (6%)

Histological type

Ductal

173 (79%)

311 (80%)

P < 0.0000

Lobular

4 (2%)

53 (14%)

Other

41 (19%)

25 (6%)


1) the age in which the incidence peak was observed after 1997

2) the first period concerned 1985–1989 as information on the woman's last occupation was available only after 1980;

3) the fist period concerned the years 1995–1996 as information on oestrogen receptor status was available only from 1995.

Bouchardy et al. BMC Cancer 2006 6:78   doi:10.1186/1471-2407-6-78

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