We read with great interest the article by Vanhala et al. [1], in which the authors aimed to investigate the incidence of severe anemia among patients with moderate-to-severe traumatic brain injury. They also evaluated patient-related and trauma-related factors that might be associated with the development of anemia. The authors of the present study mentioned that severe anemia was diagnosed in 66 patients (45.5%), of whom seven (10.6%) had anemia at admission [1]. Although they enlisted the possible exclusion factors, they did not mention the history of hemoglobinopathies. Hemoglobinopathies are a group of inherited blood disorders and diseases that primarily affect red blood cells, which can cause hemolytic anemia [2]. The authors demonstrated the decline in mean hemoglobin (Hb) values during the hospital stay, however, they did not mention the duration of hospital stay. It would be interesting to see whether this fall in Hb values correlated with the hospital stay in their patients. In a previous study, it has been observed that the decline in Hb levels correlates with prolonged intensive care unit stay [3]. It would also be interesting to know how many patients with severe anemia received blood transfusion. The authors should have also commented on how their results were different in terms of hospital stay between the patients who received transfusion and those who did not receive transfusion. Boutin et al. [4], in their multicentric cohort study, have observed that the length of intensive care unit stay and hospital stay were longer in patients with traumatic brain injury who received blood transfusion. We believe that the basic information about blood transfusion in these patients would have provided more useful insights.