In a six-month period all patients undergoing tonsillectomy or tonsillotomy with or without adenoidectomy were assessed for enrolment. Demographic and clinical data were recorded prospectively in a database which included 57 variables, such as age, gender, co-morbidities, body mass index, American Society of Anesthesiologists Physical Status Classification, indication for surgery, educational level of surgeon (consultant vs. resident), surgical technique, duration of operation and length of hospital stay.