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Table 4 Decomposition of Concentration Index of the EQ-5D Scores between respondents with and without contracted family physician

From: The effects of family physician-contracted service on health-related quality of life and equity in health in China

  Before matching After matching
With contracted family physician Without contracted family physician With contracted family physician Without contracted family physician
Variables   dy/dx con. %con. dy/dx con. %con. dy/dx con. %con. dy/dx con. %con.
Sex Female 0.009 <  0.001 0.150 − 0.034* <  0.001 − 0.453 0.017 <  0.001 − 0.486 − 0.048 <  0.001 0.633
Age group 45–59 years − 0.118*** − 0.002 − 26.518 − 0.077*** − 0.001 −4.627 − 0.133*** − 0.002 −29.125 − 0.068 − 0.001 − 5.577
  60 years and above − 0.160*** 0.003 40.722 − 0.131*** 0.002 17.125 −0.195*** 0.008 90.490 −0.130* 0.005 20.808
Chronic conditions Yes −0.211*** −0.001 −14.140 − 0.184*** 0.001 6.144 −0.195*** − 0.001 −9.299 −0.169*** <  0.001 − 1.833
Economic status Poorer 0.026 −0.002 −26.701 0.031 −0.003 − 18.485 0.007 −0.001 −6.252 0.041 −0.003 −13.158
Middle 0.062** 0.001 14.007 0.044 −0.001 −6.334 0.042 0.001 12.373 0.066 0.002 6.493
Richer 0.056* 0.006 76.268 0.100*** 0.009 64.278 0.001 <  0.001 1.964 0.091* 0.011 40.612
Richest 0.062* 0.008 95.330 0.102*** 0.018 132.104 0.045 0.006 68.097 0.115** 0.015 58.622
Educational level Junior middle school 0.119*** 0.001 12.989 0.105*** −0.005 −34.065 0.136*** 0.001 10.376 0.092** 0.001 2.664
  Senior middle school 0.096*** 0.003 40.052 0.157*** 0.006 45.973 0.121*** 0.005 63.600 0.148*** 0.007 25.668
  College or above 0.182 *** 0.007 85.576 0.164*** 0.012 87.094 0.125* 0.007 79.435 0.126** 0.007 27.006
Marital status Married −0.036 −0.001 −10.310 −0.039 −0.001 −5.762 − 0.159* − 0.003 −41.147 − 0.025 −0.001 −2.211
Other −0.093 * 0.001 8.458 −0.150*** 0.002 15.067 −0.217** 0.003 39.375 −0.167* 0.003 11.104
Employment status Employed 0.071*** <  0.001 2.135 0.043* −0.001 −5.354 0.056** <  0.001 −0.691 0.040 <  0.001 −0.191
Basic Medical Insurance URRBMI −0.020 0.002 22.316 0.026 −0.004 −25.883 −0.028 0.003 41.146 −0.006 0.001 2.907
Commercial insurance Yes 0.069** 0.002 19.545 −0.009 <  0.001 −1.125 0.064 0.001 16.933 0.012 <  0.001 1.077
Minimum travel time to the nearest health-care facility Within 15 min 0.066* 0.001 17.622 0.065 0.001 5.239 0.049 0.001 11.538 0.173*** 0.003 13.210
Residential areas Urban −0.019 −0.001 −14.754 0.075*** 0.003 24.738 −0.019 −0.002 −20.454 0.071** 0.007 26.298
C    0.008    0.014    0.008    0.026  
Age-sex C    0.007    0.012    0.003    0.022  
  1. Note: dy/dx: Partial effect in Tobit regression model; Con.: The absolute contribution of each determinant (\( {Q}_k={\beta}_k\frac{{\overline{x}}_k}{\mu }{C}_k \)); %con.: The percentage contribution of each determinant to the total concentration index (100Qk/C)
  2. *p < 0.05, **p < 0.01, ***p < 0.001