3.3. Comparison of the paranasal sinus volumes of related-ears grouped based on their mastoid aeration
There were no statistically significant differences in frontal (p=0.287) and maxillary (p=0.073) sinus volumes between the ears with fully-pneumatized, diploic, and sclerotic mastoid cells observed. However, the sphenoid sinus volumes significantly lower at the side of the ear with sclerotic mastoid than others. (p<0.001) We also observed smaller sphenoid sinus volumes at the diploic mastoid side in group 1 (p=0.003) and at the sclerotic mastoid side in group 2 (p<0.001), separately. The median (IQR) values of the parameters and posthoc analysis were given in Table 4 .