Unrecognized Prevalence of Macrocytosis among the Patients with First Episode of Psychosis and Depression.

Background: Mood disorders and psychosis has been reported among the patients with macrocytosis; however, its prevalence among the first episode of psychosis and depression is unknown. The purpose of the study was to establish the prevalence of macrocytosis among the patients with the first episode of depression and psychosis.

Materials and Methods: In this cross-sectional study, three groups comprising patients with first episode of depression ( n = 100), patients with the first episode of psychosis ( n = 100), and healthy controls ( n = 100) were included. Blood samples were collected from each participant and analyzed using the automated coulter counter. The hematological variables (e.g., macrocytosis, anemia) in the three groups were compared using the Chi-square and analysis of variance tests.

Results: The prevalence of macrocytosis among patients with depression and psychosis was 2.6 (8%) and 3.3 times (11%) higher, respectively than that among the healthy controls (3%). In addition, the hemoglobin concentration, mean corpuscular volume and mean platelet volume in patients with first episodes of psychosis and depression significantly differed from those in healthy controls P < 0.001.

Conclusion: This study showed that the prevalence of macrocytosis among the first episode of depression and psychosis was higher than healthy controls. Macrocytosis may have etiological and prognostic significance among these patients. Prospective studies are needed to explore the clinical significance of macrocytosis among the patients with depression and psychosis in the clinical practice.