Table 1.

Distribution of nasal-paranasal sinus abnormalities by age and gender

	Age (mean±SD)	Gender, female/male	Number of abnormalities
RCMs	36.64±0.36	705/724	1880 (18.2%)
OMCO	36.84±0.50	333/389	1061 (10.3%)
Accessory ostium	36.84±0.5	1015/1076	3097 (30%)
AMT	35.01±0.26	1321/1159	3830 (37.1%)
NSD	36.60±0.25	1508/1524	6064 (58.7%)*

RCMs: Retention cysts of the maxillary sinuses; OMCO: Osteomeatal complex obstruction; AMT: Abnormalities of the middle turbinate; NSD: Nasal septal deviation; SD: Standard deviation

^*NSD counted twice