Reproducibility study also presented good correlation between 2 administrations of FFQ, with Pearson correlation coefficient was 0.93 (p<0.001) and weight kappa value was 0.67.
Kết quả cho thấy tính lặp lại tốt, hệ số tương quan Pearson là 0,93 (p < 0,001), hệ số weight kappa là 0,67.