Table 1. Prevalence of various anatomical variations with 95% Confidence Interval.
| Anatomical variations | Number Total=360 | % | 95% Confidence Interval |
|---|---|---|---|
| Pneumatized Agger nasi cells | 175 | 49% | (44-54) |
| Concha bullosa | 177 | 49 | (44-54) |
| Paradoxical bending of middle turbinate | 45 | 13 | (10-17) |
| Infrabullar Cells | 35 | 10 | (7-13) |
| Suprabullar Cells | 47 | 13 | (44-54) |
| Asymmetry ethmoidal roof | 115 | 32 | (29-37) |
| Asymmetry of ethmoid fovea | 69 | 19 | (5-23) |
| Anterior ethmoidal artery canal (identified) | 51 | 14.2 | (11-18) |
| Onodi Cells. | 27 | 7.5 | (5-10) |
| Haller cells | 86 | 24% | (95%CI 18-31%) |
| Olfactory Fossa (Skull base) | |||
| Type I | 107 | 30% | (95% CI 25-35%) |
| Type II | 123 | 34% | (95% CI 29- 39) |
| Type III | 130 | 36% | (95% CI 31-41%) |
| Deviated nasal septum | 287 | 80 | (76-84) |