Prevalence of and risk factors for non-alcoholic fatty liver disease in a Chinese population: An 8-year follow-up study

Table 2 Age and sex distribution of overall non-alcoholic fatty liver disease prevalence

Age (yr)	Total	NAFLD	Overall	Males	Females	χ2value	P value
< 20	3	0	0.00%	0.00%	0.00%	-	-
20-29	342	69	20.18%	28.07%	4.39%	26.471	< 0.001
30-39	559	183	32.74%	44.14%	10.94%	63.114	< 0.001
40-49	608	245	40.30%	55.01%	14.16%	97.223	< 0.001
50-59	259	134	51.74%	60.00%	28.99%	19.499	< 0.001
60-69	119	47	39.50%	48.00%	25.00%	6.139	0.013
≥ 70	58	13	22.41%	25.00%	19.23%	0.275	0.600
Total	1948	691	35.47%	46.61%	13.98%	203.663	< 0.001

NAFLD: Non-alcoholic fatty liver disease.