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) | ||||||