ALB and viral encephalitis: Notably, the interaction analysis showed that there were no statistically significant interactions between RDW and age (P for interaction = 0.758), sex (P for interaction = 0.087), ethnicity (P for interaction = 0.538), white blood cell count (P for interaction = 0.164), hemoglobin level (P for interaction = 0.557), and albumin level (P for interaction = 0.663) with respect to the presence of encephalitis.