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Table 3 Decomposition of Concentration Index for Outpatient health care utilization in rural and non-rural

From: Assessing horizontal equity in health care utilization in Iran: a decomposition analysis

 RuralNon-rural
CoefElastCICont to CC%CoefElastCICont to CC%
Age
 < 30          
 30–59−0.014***− 0.029− 0.0320.0002.45−0.000− 0.001− 0.0390.0000.63
 ≥ 60−0.015***− 0.0090.012−0.000− 0.30− 0.004− 0.0030.016− 0.000− 0.70
Sex
 Female          
 Male−0.007*−0.022−0.0070.0000.450.0010.003−0.008−0.000− 0.46
Health statue
 Good          
 Poor0.320***0.215−0.008−0.001−4.860.328***0.219−0.005−0.001−15.77
Subtotal need   −0.000−2.26   −0.001−16.30
Education
 College and above          
 Middle & High school−0.006− 0.006− 0.0280.0000.450.0020.004−0.025−0.000−1.45
 Uneducated & Elementary0.0070.0320.2030.00617.050.0040.0130.1880.00235.15
Basic insurance
 Yes          
 No−0.039***−0.0120.007−0.000−0.250.0000.0000.0290.0000.25
Supplementary insurance
 Yes          
 No0.015**0.0850.3330.02874.050.009***0.0400.2580.010147.63
Being employed
 Yes          
 No0.016***0.035−0.012− 0.000−1.14− 0.003− 0.007−0.0110.0001.28
Martial statue
 Single          
 Married−0.005**−0.0190.011−0.000− 0.60− 0.008**− 0.0290.024− 0.000−9.89
Economic statue
 Poorest SES0.0010.001−0.227− 0.000− 0.960.0050.019− 0.540− 0.010− 149.42
 2th SES− 0.001− 0.002− 0.0830.0000.510.0090.0090.0570.0007.93
 Middle SES−0.013**−0.0160.024−0.000−1.020.0040.0020.0680.0002.61
 4th SES0.018***0.0180.0980.0014.870.021***0.0120.7650.00012.90
 5th SES          
Subtotal non-need   0.03592.96   0.00346.99
Total   0.0358    0.002 
Residual   0.002    0.005 
C   0.038*    0.007 
HI   0.039***    0.008*** 
  1. Coeff Marginal effects, Elast elasticity, CI Concentration index of the social determinants, Cont to C Contribution to the overall concentration index, C% unadjusted percentage calculated on the overall explained portion of the C, HI Horizontal Index
  2. * 0.01 ≤ p < 0.05; ** 0.001 ≤ p < 0.01; *** p < 0.001