Ideal Diagnostic Tool and Proper Statistical Analysis Improve the Credibility of the Study.

We read with great interest the recently published article by Haidari et al. in which the authors aimed to compare the dietary intakes of essential fatty acids (EFAs) and serum levels of inflammatory factors in asthmatic and healthy adults, and to examine the potential relationship between inflammatory markers and dietary fatty acids (FAs). They concluded that higher intake of omega-3 and lower levels of inflammatory factors in the healthy control group compared to asthmatic group may explain the protective role of EFAs in asthma. 1 However; we think that there are some points that should be emphasized about this study. First, in the original study, it was indicated that dietary intakes were assessed by semiquantitative food frequency questionnaire (FFQ) which had previously been validated and adapted by Mirmiran et al. to assess intakes of the main nutrients and food groups. 2