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

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)