From: A short food frequency questionnaire to assess intake of seafood and n-3 supplements: validation with biomarkers
Quartile
Same quartile
Adjacent quartile
Misclassified
1 (n = 12)
5
5 (above)
2 (above)
2 (n = 17)
8
9 (4 above, 5 below)
0
3 (n = 12)
7
5 (below)
4 (n = 12)
4 (below)
Total number (n = 53)
28
23
2
%
53
43
4