Prevalence of fatty liver disease and the economy in China: A systematic review

Table 2 Pooled prevalences and correlation analyses

	No. of studies	Weighted mean prevalence (%)	Lower-upper 95%CI (%)	Correlations between prevalence, survey years and GDP per capita
				Adjusted R2	P value		Equations
					GDP per capita	Survey years
Mainland China	27	16.73	13.92-19.53	0.8736	0.00426	0.0000394	Prevalence = 0.0001352 x GDP per capita + 0.005158 x year
Region
Interior areas	8	11.931	5.11-18.74	0.7150	NA	0.0025100	Prevalence = 0.006601 x year
Coastal areas	19	18.531	15.37-21.68	0.9196	0.00241	0.0028100	Prevalence = 0.0001591 x GDP per capita + 0.004391 x year
Gender
Female	23	14.012	11.42-16.61	0.9110	0.000808	0.0000554	Prevalence = 0.0001333 x GDP per capita + 0.004394 x year
Male	23	19.282	15.68-22.88	0.8741	0.066800	0.0000248	Prevalence = 0.0001108 x GDP per capita + 0.007886 x year
Region + Gender
Females in interior areas	7	9.293	3.65-14.94	0.7394	NA	0.0038200	Prevalence = 0.00526 x year
Females in coastal areas	16	17.1034	14.30-19.89	0.9397	0.008230	0.0017300	Prevalence = 0.0001243 x GDP per capita + 0.0047037 x year
Males in interior areas	7	13.92	4.53-23.31	0.7330	NA	0.0041200	Prevalence = 0.008618 x year
Males in coastal areas	16	21.824	17.94-25.71	0.9132	0.096440	0.0015600	Prevalence = 0.0001172 x GDP per capita + 0.007758 x year

¹The P-value is 0.2420, interior vs coastal areas;

²The P-value is 0.0071, female vs male;

³The P-value is 0.0329, female: interior areas vs coastal areas;

⁴The P-value is 0.0157, coastal areas: female vs male. NA: Not applicable.