Table 2. Association Between Preoperative Cephalometric Characteristics and Postoperative Olfactory Dysfunction.
| Variable | Definition | Median (range) | RR (95% CI)a | |
|---|---|---|---|---|
| Normosmia (n = 105) | Postoperative olfactory dysfunction (n = 42) | |||
| Maximal tumor diameter, cm | NA | 2.24 (0.25-4.72) | 2.37 (0.24-4.72) | 1.02 (0.76-1.38) |
| Skull base height No.1, cm | Vertical distance between the sphenoid sinus floor and planum sphenoidale | 2.21 (0.00-3.55) | 2.21 (0.00-3.01) | 0.82 (0.48-1.38) |
| Skull base height No.2, cm | Vertical distance between the sphenoid sinus floor and base of the sella turcica | 0.96 (0.00-2.10) | 1.00 (0.00-1.85) | 0.96 (0.62-1.48) |
| Skull base angle No.1, ° | Angle between the line along the planum sphenoidale and line along the anterior face of the sella turcica | 96.44 (64.91-130.64) | 85.76 (60.34-126.02) | 0.98 (0.96-1.00) |
| Skull base angle No.2, ° | Angle between the line along the planum sphenoidale and line along the clivus | 106.97 (85.36-130.89) | 106.79 (92.26-142.16) | 1.00 (0.97-1.03) |
| Working angle, ° | Angle between the line from the anterior nasal spine to the most superior aspect of the anterior wall of the sphenoid sinus and line from the anterior nasal spine to anteroinferior portion of sphenoid sinus face | 24.45 (14.75-33.73) | 25.42 (16.98-33.31) | 1.02 (0.96-1.09) |
| Right superior nasal cavity width, cm | Horizontal distance between the right lamina papyracea and midline of the cribriform plate | 1.16 (0.78-1.74) | 1.17 (0.89-1.71) | 1.29 (0.36-4.65) |
| Right middle nasal cavity width, cm | Horizontal distance between the right orbital strut and nasal septum | 1.32 (0.76-1.99) | 1.36 (0.92-1.89) | 1.69 (0.56-5.11) |
| Right middle turbinate width, cm | NA | 0.67 (0.27-1.45) | 0.70 (0.40-1.10) | 1.08 (0.33-3.56) |
| Left superior nasal cavity width, cm | Horizontal distance between the left lamina papyracea and midline of the cribriform plate | 1.19 (0.82-2.01) | 1.22 (0.84-1.62) | 0.99 (0.26-3.71) |
| Left middle nasal cavity width, cm | Horizontal distance between the left orbital strut and nasal septum | 1.37 (0.95-2.20) | 1.39 (1.01-2.00) | 1.44 (0.50-4.12) |
| Left middle turbinate width, cm | NA | 0.67 (0.24-1.28) | 0.63 (0.22-1.20) | 0.58 (0.12-2.83) |
| Right olfactory fossa depth, cm | NA | 0.61 (0.21-1.11) | 0.55 (0.25-1.16) | 0.40 (0.08-1.98) |
| Left olfactory fossa depth, cm | NA | 0.61 (0.18-1.13) | 0.57 (0.20-1.10) | 0.47 (0.13-1.77) |
| Pyriform aperture width, cm | NA | 2.41 (1.86-2.94) | 2.36 (2.10-2.81) | 0.64 (0.24-1.71) |
Abbreviations: NA, not applicable; RR, relative risk.
a
RR with 95% CI calculated using univariate robust logistic binomial regression.