Significantly increased ARG2 values were identified in non-allergic patients with chronic rhinosinusitis compared to the control group (FR 2.55 ± 0.52 vs. 1.31 ± 0.21, p = 0.005), while in the case of allergic patients with chronic rhinosinusitis, ARG2 values (FR 1.08 ± 0.26) were lower than in the control group, but without reaching the statistical significance threshold (Figure 4). Here, ARG2 is linked to chronic rhinosinusitis.