Table 2.

Sensitivity, Specificity and Positive Predictive Value of NBSS-derived Ethnicity for Breast Cancer Cases

Ethnic group recorded in HES	Number of cases recorded in HES	NBSS
		Sensitivity	Specificity	Positive predictive value
White	5093	99.7%	77.3%	99.3%
South Asian	82	90.0%	99.8%	87.1%
Black	44	61.4%	99.9%	79.4%
Chinese/Other	14	0.0%	100.0%
Mixed	10	0.0%	100.0%

Includes 5243 cases where ethnic group was recorded in both HES and NBSS datasets. Individual logistic models (positive outcome threshold: p > = 0.5).