Study Characteristics		Eligibility criteria	Yes/No/Unclear	Location in text
Type of study		Randomized Controlled Trial
		Controlled Clinical Trial (quasi‐randomized trial & cluster‐randomised)
		Cross‐over trial (both interventions in patients‐ order randomised)
Participants		Adults > 16 years with BMI > 25 kg/m2 undergoing GA
Types of intervention and comparison		Comparison of
		fibreoptic tracheal intubation (using either a flexible bronchoscope or flexible laryngoscope alone)
		With one of
		Direct laryngoscopy
		Non‐standard laryngoscopy (including indirect laryngoscopy using a videolaryngoscope or use of rigid/semi‐rigid stylet)
		Intubating supraglottic airway devices
Types of outcome measures				Details of outcomes & location in text
		Failed intubation or change of intubation method required.
		Hypoxia between induction and full recovery.
		Serious respiratory complications (including lower respiratory tract infection) within 30 days of anaesthetic.
		Mortality within 30 days of anaesthetic
		Patient –reported sore throat/ hoarseness
		Patient satisfaction
		Laryngeal / airway Trauma
		Number of attempts at intubation
		Time to secure airway
Outcomes are not part of the eligibility criteria – so a study which meets design, participant and intervention criteria is included.
INCLUDE/ EXCLUDE/ UNCLEAR
Reason for exclusion