A Nation-Wide multicenter 10-year (1999-2008) retrospective clinical epidemiological study of female breast cancer in china

Table 5 Stage distribution of breast cancer cases by region

Clinical Stage	Total		More Developed Regions**								Less Developed Regions***										P*
			North		South		East		Sub-total		Northeast		Central		North-West		South-West		Sub-total
	N	%	N	%	N	%	N	%	N	%	N	%	N	%	N	%	N	%	N	%
Stage I	663	15.7	172	26.8	98	16.2	95	15.7	365	19.9	131	15.8	73	13.4	77	15.9	17	3.4	298	12.7
Stage II	1891	44.9	280	43.7	243	40.2	239	39.4	762	41.6	323	38.8	400	73.3	170	35.2	236	47.3	1129	48.3
Stage III	788	18.7	93	14.5	117	19.4	152	25.1	362	19.8	119	14.3	53	9.7	127	26.3	127	25.5	426	18.2	< 0.001
Stage IV	113	2.7	2	0.3	20	3.3	5	0.8	27	1.5	4	0.5	3	0.6	56	11.6	23	4.6	86	3.7
Unknown	756	18.0	94	14.7	126	20.9	115	19.0	335	18.3	255	30.7	17	3.1	53	11.0	96	19.2	421	18.0

ISSN: 1471-2407