Table 1.

The quality control index of breast cancer in China in 2013

Areas	M/I	MV%	DOC%	UB%
All	0.24	87.94	0.41	0.28
Urban areas	0.23	88.88	0.42	0.27
Rural areas	0.26	86.41	0.40	0.30

DOC, death certificate only; M/I, mortality to incidence; MV, morphological verification; UB, unknown basis of diagnosis.