Table 2 Clinical and surgical characteristics of patient cohort
|  | Total cohort (n = 85) | IP recurrence (15.3%, n = 13) | No IP recurrence (85.7%, n = 72) | HR | 95% CI | p value |
|---|---|---|---|---|---|---|
Type of surgery performed*, n (%) | ||||||
Standard Endoscopic resection** | 29 (34.1) | 26 (36) | 3 (23) | 1.04 | 0.28–3.86 | 0.95 |
Extended resection†| 56 (65.8) | 46 (64) | 10 (77) | 0.96 | 0.26–3.57 | 0.95 |
IP attachment site, n (%) | ||||||
Maxillary | 43 (50.6) | 6 (46.2) | 37 (51.4) | 0.79 | 0.25–2.47 | 0.69 |
Ethmoid | 22 (25.9) | 3 (23.1) | 19 (26.4) | 0.50 | 0.11–2.28 | 0.37 |
Frontal sinus | 9 (10.6) | 1 (7.7) | 8 (11.1) | 0.94 | 0.11–7.31 | 0.95 |
Sphenoid | 6 (7.1) | 1 (7.7) | 5 (6.9) | 0.91 | 0.12–7.07 | 0.93 |
Skull base | 16 (18.8) | 3 (23.1) | 13 (18.1) | 0.66 | 0.15–3.04 | 0.60 |
Extra-sinus§ | 44 (51.8) | 6 (46.2) | 38 (52.8) | 1.28 | 0.41–4.02 | 0.67 |
Maxillary sinus involvement, n (%) | ||||||
Posterior wall | 16 (18.8) | 2 (15.4) | 14 (19.4) | 0.70 | 0.15–3.20 | 0.65 |
Inferior wall | 14 (16.5) | 2 (15.4) | 12 (16.7) | 1.04 | 0.23–4.75 | 0.96 |
Lateral wall | 21 (24.7) | 5 (38.5) | 16 (22.2) | 1.73 | 0.55–5.44 | 0.35 |
Anterior wall | 17 (20.2) | 4 (30.8) | 13 (18.3) | 1.70 | 0.51–5.68 | 0.39 |
Medial wall | 23 (27.1) | 3 (23.1) | 20 (27.8) | 0.89 | 0.24–3.29 | 0.86 |
Superior wall | 11 (12.9) | 2 (15.4) | 9 (12.5) | 1.07 | 0.23–4.90 | 0.94 |
Single attachment site, n (%) | 30 (35.3) | 4 (30.8) | 26 (36.1) | 0.70 | 0.19–2.60 | 0.60 |
Multiple attachment sites, n (%) | 54 (64.3) | 9 (69.2) | 45 (62.5) | 1.43 | 0.39–5.27 | 0.60 |
Krouse, median (IQR) | 3 (2–3) | 3 (2–3) | 3 (2–3) | 1.23 | 0.52–2.92 | 0.63 |