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Table 2 Results from decomposition analysis for participation of colorectal 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

Colorectal cancer screening Cycle 1 (1998) Cycle 3 (2005) Cycle 5 (2010–2012)
Elasticity Ck Contribution Elasticity Ck Contribution Elasticity Ck Contribution
Sex- female 0.039 -0.016 -0.001 -0.198 -0.024 0.005 -0.009 -0.024 0.000
Age -0.636 -0.017 0.011 -0.083 -0.029 0.002 -0.264 -0.039 0.010
Self-rated health - fair -0.076 0.102 -0.008 -0.088 0.088 -0.008 0.037 0.040 0.001
Self-rated - poor -0.097 0.033 -0.003 -0.094 0.176 -0.017 0.009 0.127 0.001
Sub-total - need factors    -0.001    -0.017    0.013
Marital status- married 0.030 0.041 0.001 -0.056 0.082 -0.005 0.113 0.090 0.010
Education - completion of middle school 0.024 0.142 0.003 0.060 0.120 0.007 0.026 0.090 0.002
Education - completion of high school 0.138 0.263 0.036 0.012 0.232 0.003 0.033 0.222 0.007
Education - completion of university or above 0.045 0.501 0.023 0.010 0.397 0.004 0.019 0.400 0.008
Employment - non-manual job 0.014 0.760 0.011 -0.003 0.657 -0.002 0.003 0.493 0.001
Employment-othersa 0.039 -0.177 -0.007 -0.054 -0.240 0.013 0.010 -0.160 -0.002
Income quintile 2 (low) 0.118 -0.349 -0.041 0.062 -0.319 -0.020 0.027 -0.447 -0.012
Income quintile 3 0.032 0.031 0.001 0.045 0.060 0.003 0.039 -0.057 -0.002
Income quintile 4 0.037 0.508 0.019 0.103 0.401 0.041 0.028 0.366 0.010
Income quintile 5(high) 0.099 0.910 0.090 0.112 0.830 0.093 0.039 0.799 0.031
Health insurance - National Health Insurance -0.294 0.030 -0.009 0.239 0.042 0.010 0.106 0.025 0.003
Region - Metro Seoul areas 0.061 0.159 0.010 0.020 0.156 0.003 0.013 0.076 0.001
Place of residence - rural areas -0.247 -0.052 0.013 0.143 -0.044 -0.006 -0.151 -0.033 0.005
Sub-total - non-need factors    0.150    0.144    0.063
Residual    0.008    0.012    0.055
Normalized concentration index (CI) (95 % confidence interval)   0.157 (0.067–0.247)   0.139 (0.077–0.202)   0.131 (0.102–0.162)
  1. a“Others” included unemployment and out of labour market