Egeli 2004.

Methods	Design: double‐blind, prospective randomized controlled trial Country: Turkey Multisite: no International: no Treatment duration: postoperative period Follow‐up: 1 week postoperatively Operative procedure(s): adenotonsillectomy Randomization unit: participants Analysis unit: individual
Participants	40 participants enrolled Children aged 4 to 18 years undergoing adenotonsillectomy under general anaesthesia with endotracheal intubation for chronic infection, obstructive hypertrophy, or both Exclusion criteria included: the presence of systemic or neurologic diseases; bleeding disorders. Randomized to: group A (n = 20, 50%); group B (n = 20, 50%). Main characteristics of participants: age (mean, standard deviation): Group A 8.25 years, 2.75; Group B 8.20 years, 3.90; number of females/males: 11/29.
Interventions	Group A (intervention): postoperative infusion of 60 to 120 mL/hour 5% dextrose in Ringer's lactate Group B (control): no postoperative hydration Co‐interventions: none stated
Outcomes	Nausea and vomiting assessed as dichotomous outcomes using a questionnaire completed by the participant's parent on postoperative day 0, 1, 2, 3, 4, 5, and 6. Also assessed on the questionnaire were halitosis, bleeding, otalgia, trismus, fever, and 'other'. Intensity and progression of pain were assessed using the McGrath's face scale at postoperative hours 1, 5, 13, 17, and 21, as well as on postoperative days 1, 2, 3, 4, 5, and 6.
Notes	Trial registration: not stated Funder: not stated A priori sample size estimation: not stated Conducted: dates not stated Declared conflicts of interest: not stated
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	No information on the randomization protocol was provided.
Allocation concealment (selection bias)	Unclear risk	No information on the randomization protocol was provided.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Participants and their parents were aware of group allocation as the intervention was postoperative IV fluid administration.
Blinding of outcome assessment (detection bias) All outcomes	High risk	The (unblinded) parent completed the questionnaire and used the McGrath Face Scale to assess pain.
Incomplete outcome data (attrition bias) All outcomes	Low risk	No withdrawals were stated.
Selective reporting (reporting bias)	Low risk	All outcomes were reported.
Other bias	Low risk	There were no other sources of bias.