Independent predictors of POST derived from the multivariate regression analysis
| Risk factors | β coefficient | SE | Wald value | OR | 95% CI | P value |
| Age (≤55 years) | 0.51 | 0.24 | 4.62 | 1.66 | 1.05 to 2.63 | 0.032 |
| Surgical site (head and neck surgery) | 0.88 | 0.36 | 5.88 | 2.42 | 1.18 to 4.94 | 0.015 |
| Duration of anaesthesia (≥4 hours) | 1.080 | 0.22 | 24.28 | 2.26 | 1.51 to 3.39 | 0.009 |
| History of chronic pharyngitis | 0.70 | 0.27 | 6.77 | 2.01 | 1.19 to 3.41 | 0.009 |
POST, postoperative sore throat.