Fig. 2.

Severity of postoperative adverse outcomes based on endoscopic examinations: comparison between the treatment and control groups. The Lund-Kennedy score at 2–3 weeks (A), and 2–3 months (B), perioperative sinus endoscopy score at 2–3 weeks (C) and 2–3 months (D). Crusting at 2–3 weeks (E), and 2–3 months (F), nasal discharge at 2–3 weeks (G) and 2–3 months (H), edema at 2–3 weeks (I). And 2–3 months (J), ethmoid inflammation at 1 month (K), polyposis at 2–3 weeks (L) and 2–3 months (M). Polypoid changes at 1 month (N) and 2–3 months (O), and the need for oral steroid use (P). SD, standard deviation; SMD, standardized mean difference; CI, confidence interval.