Beriat 2013.

Study characteristics
Methods	Non‐blinded, parallel‐group randomised controlled surgical trial with 1‐year duration of follow‐up
Participants	Setting: Bulanik State Hospital, Turkey Sample size: Number randomised: 82 children Number completed: 82 children Participant (baseline) characteristics: Age: 4 to 12 years Gender: 56% boys, 44% girls Inclusion criteria: children who suffer from snoring, evidenced apnoea, sleeping with mouth open. Diagnosis was "obstructed airway" according to tonsil hypertrophy based upon the information given by parents and clinical inspection. Exclusion criteria: children with successive streptococcal tonsillitis attack more than 3 times within 2 years; peritonsillar abscess history; chronic infected tonsillitis during consultation (upon pressure, tonsils generates pus); obese children who possibly have complex obstructive sleep apnoea syndrome; craniofacial abnormalities and coagulopathy
Interventions	Intervention group: tonsillectomy by conventional cold steel dissection (TE) (n = 45) Comparator group: intracapsular tonsillotomy (TT) using microdebrider (n = 37) Use of additional interventions: none stated
Outcomes	Short‐term outcomes (2 weeks): intraoperative blood loss, operation time, postoperative pain, analgesic use, otalgia, sore throat, transition to painless oral nutrition Long‐term outcomes (1 year): throat infections
Notes	Participants lost to short‐term follow‐up total: 0% Participants lost to long‐term follow‐up total: 0%
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Unclear risk	Quote: "Through random selection"; no further information provided
Allocation concealment (selection bias)	Unclear risk	Quote: "Through random selection"; no further information provided
Blinding of participants and personnel (performance bias) All outcomes	High risk	Not blinded
Blinding of outcome assessment (detection bias) All outcomes	High risk	Not blinded
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No loss to follow‐up in short term; not stated for long term
Selective reporting (reporting bias)	Unclear risk	No protocol available; insufficient information to permit a judgement of low or high risk
Other bias	Unclear risk	Baseline characteristics: balanced ITT analysis: performed Formal sample size calculations: not performed Use of co‐interventions: not performed