Participant flow and baseline characteristics
Forty patients were enrolled in the study. However, two patients were excluded due to a
history of previous sinus surgery. Thirty-eight patients were randomized to receive nasal irrigation (n=19, 38 sides) or nasal spray (n=19, 38 sides). Five sides of the nasal cavity were excluded for data analysis due to significant perioperative bleeding. Finally, there were 19 subjects with 36 sides in the nasal irrigation group and 19 subjects with 35 sides in the nasal spray group for the intention-to-treat analysis.(Figure 2)  Of these 38 participants, the baseline characteristics were balanced between two groups, as shown in Table 1 .