BMC Health Services Research

Table 6 Concentration index of samples

From: Prevalence and income-related equity in hypertension in rural China from 1991 to 2011: differences between self-reported and tested measures

Year	Self-reported hypertension		Tested hypertension
Year	Altered sample	Original sample	Altered sample	Original sample
1991	0.122	0.118	0.085	0.088
1993	0.156	0.144	0.000	−0.003
1997	0.041	0.064	−0.006	−0.008
2000	0.048	0.052	0.012	0.010
2004	0.111	0.110	0.023	0.031
2006	0.119	0.119	−0.033	−0.030
2009	0.070	0.065	0.008	0.006
2011	0.030	0.032	−0.025	−0.024

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ISSN: 1472-6963

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