Characteristics of Hematologic Parameters in Young Patients with Retinal Vein Occlusion

Introduction: The aim of this study was to investigate the characteristics of hematologic parameters in young patients with retinal vein occlusion (RVO). Methods: All participants underwent routine ocular examinations and blood sample tests. Hematologic parameters obtained from a complete blood count, as well as the calculation of specific inflammatory indices, were compared between young patients with RVO and the control subjects. Correlations between hematologic inflammatory biomarkers and aqueous humor inflammatory cytokines were also investigated. Results: A total of 64 patients with RVO and 64 age- and gender-matched control subjects were included in this study. The white blood cell count, neutrophil cell count, mean platelet volume (MPV), neutrophil-to-lymphocyte ratio (NLR), systemic immune-inflammation index (SII), and systemic inflammatory response index (SIRI) in young patients with RVO were significantly higher than in the controls (all p < 0.05). Compared to patients with nonischemic RVO, patients with ischemic RVO had higher NLR, SII, and SIRI values (p = 0.032, p = 0.035, and p = 0.039, respectively). The areas under the receiver operator characteristic curve were 0.725, 0.651, 0.649, and 0.634 for the MPV, NLR, SII, and SIRI, respectively. In addition, a higher NLR was related to higher levels of interleukin 6 (IL-6; p = 0.046, R = 0.463), and a higher SII was related to higher levels of IL-6 (p = 0.034, R = 0.488) and vascular endothelial growth factor (p = 0.020, R = 0.528). Conclusion: The NLR, SII, and SIRI were significantly elevated in young patients with RVO, especially in young patients with ischemic RVO. NLR and SII were positively correlated with IL-6 levels in aqueous humor, which indicated that systemic inflammation plays an important role in the onset of RVO in young patients.