Table 1.

The proportion of fatty liver disease in Korean general population between 2009 and 2017 by age groups

Year	Age 20–39 years				Age 40–64 years				Age ≥65 years
	Number	Proportion of fatty liver disease by FLI, %			Number	Proportion of fatty liver disease by FLI, %			Number	Proportion of fatty liver disease by FLI, %
		≥30	≥30–<60	≥60		≥30	≥30–<60	≥60		≥30	≥30–<60	≥60
2009	61,925	31.1	18.3	12.8	115,515	39.5	25.3	14.2	27,366	40.6	29.6	10.9
2010	66,803	29.5	17.6	11.9	130,654	38.7	25.1	13.7	29,700	40.4	29.7	10.8
2011	66,317	30.7	18.0	12.8	136,197	38.4	24.7	13.7	30,685	38.9	29.0	9.9
2012	65,405	30.3	17.3	13.0	142,791	38.4	24.7	13.7	32,939	38.4	28.4	10.0
2013	65,115	31.5	17.5	14.0	141,682	38.3	24.3	14.0	34,771	38.6	28.5	10.1
2014	68,042	31.3	17.4	13.8	153,868	38.5	24.3	14.2	37,892	38.1	28.1	10.0
2015	66,767	32.3	17.6	14.7	158,253	39.8	24.7	15.1	39,583	39.0	28.5	10.5
2016	70,153	33.0	17.4	15.6	174,200	40.1	24.6	15.5	43,767	39.3	28.3	11.0
2017	69,865	34.3	17.9	16.4	177,226	41.0	24.7	16.3	45,681	40.4	29.3	11.1
P for trend		<0.001	0.021	<0.001		<0.001	0.002	<0.001		0.636	0.019	0.006

P for interaction between age and fatty liver disease (FLI ≥30) <0.001; P for interaction between age and fatty liver disease (FLI ≥30 to <60)=0.072; P for interaction between age and fatty liver disease (FLI ≥60) <0.001.

FLI, fatty liver index.