Table 5.

Sensitivity, Specificity and Positive Predictive Value of Census Data on Ethnicity

Ethnic group	Sensitivity	Specificity	Positive predictive value
White	99.3%	21.4%	96.8%
South Asian	7.4%	99.8%	44.9%
Black	2.3%	99.9%	34.4%
Chinese/Other	0.0%	100.0%
Mixed	0.0%	100.0%

Includes 85352 cases where a single ethnic group was recorded in the HES dataset. Census data used to predict ethnic group were: percentage of local population in South Asian, Black, Chinese/Other and Mixed ethnic group at last national census. Individual logistic models (positive outcome threshold: p > = 0.5).