Table 1. Demographics of the study group

Characteristic	Value
Sex
Male: Female	138 (59.2): 95 (40.8)
Age: years	46.7±14.6: 48.2±15.3
FOG
Positive	386 (82.8)
Neutral	61 (13.1)
Negative	19 (4.1)
FOD (mean)	9.43±2.80
FOD (median)	9.14

Data are presented as n (%) or mean±SD (mm).
FOG: frontal ostium grade, FOD: frontal ostium diameter.