N (%)
Gender
Female 50 (47.2)
Male 56 (52.8)
Total 106 (100)
PTF morphology-right
Type 1 (widely open) 47 (44.3)
Type 2 (narrow middle) 28 (26.4)
Type 3 (very narrow/closed) 31 (29.2)
PTF morphology-left
Type 1 (widely open) 38 (35.8)
Type 2 (narrow middle) 44 (41.5)
Type 3 (very narrow/closed) 24 (22.6)
Total 212 (200)
Age (years) Mean (SD)
47.4 (15.9)

PTF = petrotympanic fissure; N = number; SD = standard deviation.