| Popis: |
Background: Dietary fatty acids (DFAs) and plasma fatty acids (PFAs) are linked with obesity. However, whether this association exists amongst ethnic minorities remains lacking. The present case-control study was designed to investigate the correlation between DFAs, PFAs and obesity in 4 ethnic minority groups to Southwest China.Method: A total of 166 obese people, and 166 normal-BMI subjects were recruited from 4 different ethnic minority groups. The subjects were also matched based on their age-, sex-, and ethnicity. DFAs were obtained through food frequency questionnaires. PFAs were assayed by GC/MS method. Binary and multiple regression analyses were preformed to evaluate the correlation among DFAs, PFAs and obesity. Canonical correlation analysis (CCA) was conducted to assess the relationship between DFAs and PFAs. Results: FAs were found to be highest in the Naxi people and lowest in the Hani people. Multiple logistic regression analysis revealed that plasma C16:0 (OR = 1.310; 95% CI, 1.028 - 1.669; P < 0.05) in the Hani people, plasma C18:0 (OR = 0.499; 95% CI, 0.343 - 0.727; P < 0.05) in the Naxi people, plasma C20:3 n-6 (OR = 6.250; 95% CI, 1.224 - 31.927; P < 0.05) in the Wa people were seen to be independent predictive factors for obesity. CCA showed that DFAs were positively correlated with PFAs in the Naxi (r: 0.676; P < 0.05) and Bulang people (r: 0.897; P < 0.05), but there was no correlation in the Hani and Wa people. Conclusion: In this study, PFAs but not DFAs were independently associated with obesity, and different among the 4 ethnic minorities. |
