Table 1.

The Concentration Index (CI) for obesity in Korean adults, 1998−2015.

KNHANES Wave	Wave 1 (1998)	Wave 4 (2007–2009)	Wave 6 (2013–2015)
Concentration Index	0.018	−0.041	−0.076
Erreygers correction	0.014	−0.035	−0.067
SE	0.011	0.007	0.007
95% CI	−0.010–0.047	−0.060–−0.022	−0.096–−0.056