Staining score of fluorescein in each anatomical area
In the nasal irrigation group, the staining score of fluorescein was statistically significantly higher at the maxillary sinus (mean difference=1.38, 95%CI:0.83-1.93, p -value <0.001) and anterior ethmoid sinus (mean difference=0.53, 95%CI:0.13-0.93, p -value 0.009). The rest of the sinuses had no significant difference in fluorescein staining.(Table 2)