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Table 3 Results from decomposition analysis for participation of gastric cancer screening services among Korean adults, Korea National Health and Nutrition Examination Survey (KNHANES) cycle 1 (1998), cycle 3 (2005), and cycle 5 (2010–2012)

From: Assessment of trends in socioeconomic inequalities in cancer screening services in Korea, 1998–2012

Gastric cancer screening 1998 2005 2010–2012
Elasticity Ck Contribution Elasticity Ck Contribution Elasticity Ck Contribution
Sex- female -0.072 -0.015 0.001 0.031 -0.020 -0.001 0.097 -0.018 -0.002
Age -0.250 -0.037 0.009 -0.169 -0.050 0.008 0.295 -0.052 -0.015
Self-rated health - fair -0.079 0.090 -0.007 -0.045 0.069 -0.003 0.026 0.026 0.001
Self-rated - poor -0.132 0.041 -0.005 -0.069 0.172 -0.012 0.015 0.119 0.002
Sub-total - need factors    -0.002    -0.007    -0.014
Marital status- married 0.086 0.060 0.005 0.101 0.097 0.010 0.145 0.084 0.012
Education - completion of middle school 0.026 0.034 0.001 0.013 -0.013 0.000 0.017 -0.049 -0.001
Education - completion of high school 0.084 0.185 0.016 -0.032 0.144 -0.005 0.025 0.133 0.003
Education - completion of university or above 0.077 0.463 0.036 -0.002 0.431 -0.001 0.018 0.347 0.006
Employment - non-manual job 0.051 0.564 0.029 0.031 0.568 0.017 0.013 0.382 0.005
Employment - othersa 0.073 -0.120 -0.009 0.003 -0.313 -0.001 -0.012 -0.185 0.002
Income quintile 2 (low) 0.079 -0.424 -0.033 0.063 -0.366 -0.023 0.019 -0.468 -0.009
Income quintile 3 0.053 -0.063 -0.003 0.033 0.040 0.001 0.022 -0.053 -0.001
Income quintile 4 0.142 0.420 0.060 0.037 0.404 0.015 0.039 0.384 0.015
Income quintile 5(high) 0.066 0.869 0.058 0.106 0.821 0.087 0.044 0.810 0.036
Health insurance - National Health Insurance -0.034 0.025 -0.001 -0.181 0.036 -0.007 0.031 0.024 0.001
Health insurance - neither -0.008 -0.327 0.003 -0.002 -0.565 0.001 0.000 -0.184 0.000
Region - Metro Seoul areas 0.031 0.122 0.004 0.016 0.113 0.002 -0.009 0.044 0.000
Place of residence - rural areas -0.116 -0.063 0.007 0.095 -0.038 -0.004 -0.005 -0.033 0.000
Sub-total - non-need factors    0.170    0.094    0.060
Residual    0.011    0.047    0.077
Normalized concentration index (CI) (95 % confidence interval)   0.179 (0.128-0.230)   0.134 (0.096-0.172)   0.132 (0.107-0.158)
  1. a“Others” included unemployment and out of labour market