Table 3.

Summary measures of SES inequality and the prevalence of anemia, underweight, diabetes and prediabetes among reproductive age group women aged 15 to 49 years

Variable	Concentration indexc	Standard error (SE)	P-value
Underweight women	−.52	.03	<.001
Anemic women	−.42	.01	.002
Pre-diabetic women	−.32	.01	.04
Diabetic women	−.30	.04	.02

^C Obtained by the formula 2σ² _r (h_i/μ) = α + βr_{i +}ε_i;, h is the health variable whose inequality is being measured, μ is its mean, r_i is the ith individual’s fractional rank (for example if a women is underweight and which SES group she is belonging) in the socioeconomic distribution, σ² _r is the variance of the fractional rank, The estimate β is equal to the concentration index, r_{i =} underweight women, anemic women, pre-diabetic women, diabetic women α is constant (underweight women = .65, anemic women = .95, pre-diabetic women = .94, diabetic women = .84) and ε_i is the error term. Concentration index has a negative value when the health indicator is concentrated among the disadvantaged; A positive value when the health indicator is concentrated among the advantaged; When there is no inequality the value is equals 0; the theoretical maximum is ±1