3.1 Patient Population and Demographic Data
The mean age was 36 years (range: 7-82) and 71 (56%) patients were male. Fifty patients (31.8%) underwent TEES whereas 107 (68.2%) underwent microsurgery (80) or a combined endoscopic approach (27).
The mean (SD in brackets) pre-operative hearing for the whole group, microscopic group, and TEES group were as follows. AC 43.4dB (17.7), 42.7dB (18.1), 44.8dB (16.8). BC 20.3dB (12.3), 19.8dB (12.7), and 21.2dB (11.4) and the ABG 21.8dB (11.8), 21dB (12.3) 23.6dB (10.4), respectively. There was no significant difference between groups (p >0.05).