Analysis of platelet-to-lymphocyte ratio requires methodological consideration

I read the article by Kundi et al. (1) entitled “Relationship between platelet-to-lymphocyte ratio and the presence and severity of coronary artery ectasia” published in Anatolian J Cardiol 2016;16: 857-62. The authors aimed to investigate the relationship between the platelet-to-lymphocyte ratio (PLR) and coronary artery ectasia in the adult population. They found that PLR values in patients with isolated coronary artery ectasia were significantly higher than those in patients with obstructive coronary artery disease and the control group with normal coronary artery angiograms. I have a few comments: PLR is calculated as the ratio of the platelet to lymphocyte count from the same complete blood count, which is a widely available, automated, inexpensive, and easy-to-do test