[Case-control study of the relationship between dietary fatty acids intake and non-alcoholic fatty liver disease in Nanping City, 2015-2017].

OBJECTIVE: To explore the relationship between different kinds of dietary fatty acids intake and non-alcoholic fatty liver disease(NAFLD). METHODS: A 1↿ frequency matched case-control study was conducted among 546 NAFLD patients diagnosed by ultrasound as case group, 546 people without NAFLD randomly selected and matched by sex and age(±5) as control group from April 2015 to August 2017 in Nanping first hospital. The data was obtained from participants using structured questionnaires during face-to-face interviews. Information on dietary intake was collected using semi-quantitative food frequency questionnaires. Residual method was used to derive energy-adjusted variable, unconditional Logistic regression was used to estimate odds ratios(OR) and their 95% CI. RESULTS: The NAFLD group consumed a significantly higher amount of fatty acid(FAs), saturated fatty acid(SFAs), mono-unsaturatedfattyacids(MUFAs), poly-unsaturated fatty acids(PUFAs), n-3 PUFAs, n-6 PUFAs, C16↿, C18↿, C16↿, C18↿, C18↿ and C18↿. Multivariate unconditional Logistic regression analysis indicated that daily intake of total fatty acids, MUFAs, n-6 PUFAs, C18↿, C18↿ more than 98. 96 g/d, 38. 83 g/d, 26. 23 g/d, 33. 55 g/d and 24. 91 g/d respectively, were the risk factors for NAFLD. The adjusted ORs and 95% CI were 2. 26(1. 49-3. 44), 1. 93(1. 29-2. 88), 5. 13(3. 40-7. 76), 1. 82(1. 22-2. 79) and 5. 24(3. 40-7. 76). Daily intake of C20↿, C22↿ in 0. 07-0. 09 g/d, 0. 01-0. 02 g/d were the protective factors for NAFLD. The adjusted ORs and 95% CI were 0. 58(0. 39-0. 85) and 0. 64(0. 43-0. 94). CONCLUSION: Daily intake of total fatty acids, MUFAs, n-6 PUFAs, C18↿, C18↿ more than 98. 96, 38. 83, 26. 23, 33. 55 and 24. 91 g/d respectively, were the risk factors for NAFLD. Daily intake of C20↿, C22↿ in 0. 07-0. 09 g/d, 0. 01-0. 02 g/d respectively, were the protective factors for NAFLD.