Dear Editor-in-Chief of Iranian Journal of Emergency Medicine
In volume 5 of the journal (2018), a paper was published titled "Comparison of Liquid Tissue Adhesive and Suture in Pediatric Wound Repair; a Case Control Study", about which some points and questions should be raised:1. In the title and methods section of this paper, the authors stated that this study is a "case control study", while case-control studies are a type of observational study, which start with the outcome and end with exposure; as patients (as case group) and non-patients (as control group) will be questioned or examined regarding previous exposure. In addition, since they are observational, no interventions are performed in this type of study.
Sanji-Rafsanjani M, Dinpanah H, Esmaeili-Ranjbar A, Rostami-Shahrebabaki M. Comparison of Liquid Tissue Adhesive and Suture in Pediatric Wound Repair; a Case Control study. Iranian Journal of Emergency Medicine. 2018;5:e7.
Mann C. Observational research methods. Research design II: cohort, cross sectional, and case-control studies. Emergency medicine journal. 2003;20(1):54-60.
Maciejewski ML. Quasi-experimental design. Biostatistics & Epidemiology. 2018:1-10.