4.2 Variables
Data on sex and age were collected by the medical records.
The extension of tumour was defined by preoperative Krouse staging ,12 see table 1.
Comorbidity of the patients was defined by the American Society of Anaesthesiologists (ASA) classification, ranging from ASA 1 toASA 6 .13 Smoking was added as separate variable.
To assess whether the preoperative EES-Q score could be a predictor for postoperative HRQoL, three equal groups were made based on the preoperative EES-Q score. These were obtained by the 33⅓ and 66⅔ percentile of the preoperative scores. These groups were defined aslow preoperative EES-Q score , middle preoperative EES-Q score and high preoperative EES-Q score .
Surgical procedures (as mentioned above) were defined as medial maxillectomy type 2 , medial maxillectomy type 3 andother .
If patients had postobstructive sinusitis, they were given oral antibiotics following surgery. We examined the effect ofpostoperative antibiotics on the postoperative HRQoL.