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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