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Table 1 Distribution of breast cancer cases in women as a function of age and stage at diagnosis from 2000 to 2015 in São Paulo/Brazil

From: Downstaging in opportunistic breast cancer screening in Brazil: a temporal trend analysis

Group Age
/Stage
<  40
years
40–49 years 50–59 years 60–69 years ≥ 70
years
Total
n (%) n (%) n (%) n (%) n (%) n (%)
Stage 0 477 2095 2183 1559 933 7247
(5.0) (9.2) (8.7) (8.0) (5.6) (7.7)
Stage I 1297 4384 5642 4909 3715 19,947
(13.6) (19.3) (22.5) (25.0) (22.2) (21.3)
Stage IIA 2008 5065 5638 4651 3960 21,322
(21.0) (22.3) (22.5) (23.7) (23.7) (22.8)
Stage IIB 1594 3336 3346 2336 2110 12,722
(16.7) (14.7) (13.3) (11.9) (12.6) (13.6)
Stage IIIA 1757 3241 2998 1935 1332 11,263
(18.4) (14.3) (12.0) (9.9) (8.0) (12.0)
Stage IIIB 1419 2878 3227 2530 2914 12,968
(14.9) (12.7) (12.9) (12.9) (17.4) (13.8)
Stage IV 994 1709 2057 1687 1758 8205
(10.4) (7.5) (8.2) (8.6) (10.5) (8.8)
Total 9546 22,708 25,091 19,607 16,722 93,674
(100.0) (100.0) (100.0) (100.0) (100.0) (100.0)