Evaluation of primary markers of inflammation and the systemic inflammation index in specific learning disabilities

<b>Aim:</b> Specific learning disorder (SLD) is a term that refers to reading, writing and arithmetic difficulties. The neutrophil/lymphocyte ratio (NLR), platelet/lymphocyte ratio (PLR) and systemic inflammation index (SII) are affordable and accessible inflammatory biomarkers. This research aims to evaluate the relationship between NLR, PLR, SII and SLD to determine whether inflammation contributes to pathogenesis.<b>Methods:</b> This study included 90 SLD-diagnosed patients and 90 age-, sex- and ethnicity-matched healthy controls. Blood cell counts and NLR, PLR and SII values were obtained from medical records and compared between the two groups.<b>Results:</b> The NLR, PLR and SII were significantly higher (<i>p</i> = 0.029, <i>p</i> = 0.033 and <i>p</i> = 0.018 respectively) and lymphocyte counts were significantly lower (<i>p</i> = 0.041) in the SLD group. WISC-R total scores decreased with age in the SLD group (-1.988 coefficient, Beta = -0.247 ß, <i>p</i> = 0.041). Multivariate logistic regression analysis revealed that the SII was the only parameter independently associated with the diagnosis of SLD (Beta = 0.003, <i>p</i> = 0.023).<b>Conclusion:</b> Inflammation might play a role in SLD etiopathogenesis. NLR, PLR and SII may be potential biomarkers for SLD in children. Further research may lead to early diagnosis and additional anti-inflammatory pharmacological therapies for SLDs.