| Level I | Good quality evidence |
Systematic review of RCTs with consistent findings High quality individual RCT |
| Level II |
Limited quality patient orientated evidence |
Systematic review of lower quality studies or studies with inconsistent findings Low quality clinical trial Cohort studies Case-control studies |
| Level III | Other |
Consensus guidelines, extrapolations from bench research, usual practice, opinion, disease-oriented evidence (intermediate or physiologic outcomes only), or case series |
[9] Sevoflurane: Johannesson GP, Floren M, Lindahl SG. Sevoflurane for ENT-surgery in children. A comparison with halothane. Acta Anaesthesiol Scand 1995; 39: 546-50. AND Meretoja OA, Taivainen T, Raiha L, Korpela R, Wirtavuori K. Sevoflurane-nitrous oxide or halothane nitrous-oxide for paediatric bronchoscopy and gastroscopy. Br J Anaesth 1996; 76: 767-771.AND Kataria B et al. A comparison of sevoflurane to halothane in paediatric surgical patients: results of a multicenter international study. Paediatric Anaesthesia 1996; 6: 283-293. AND Paris ST, Cafferkey M et al. Comparison of sevoflurane and halothane for outpatient dental anaesthesia in children. Br J Anaesth 1997; 79: 280-284. AND Agnor RC, Sikich N, Lerman J. Single-breath vital capacity rapid inhalation induction in children: 8% sevoflurane versus 5% halothane. Anesthesiology 1998; 89: 379-38 AND Blayney MR, Malins AF, Cooper GM. Cardiac arrhythmias in children during outpatient general anaesthesia for dentistry: a prospective, randomised trial. Lancet 1999; 354: 1864-66 AND Viitanen H, Baer G, Koivu H, Annila P. The haemodynamic and holter-electrocardiogram changes during halothane and sevoflurane anesthesia for adenoidectomy in children aged one to three years. Anesth Analg 1999; 87: 1423-5.