Table 1.

Collected variables.

Independent Variables		Intraoperative Variables
Gender	Male/female	CUFF pressure 1	cm H2O
Age	Years	CUFF pressure 2	cm H2O
Length	Cm	Cough during intubation	Yes/no
Weight	Kg	Use of stilet	Yes/no
Smoker	Yes/no	Use of ventricular probe	Yes/no
ASA Score	Grade 1–2	Visible blood trail at the tube at extubation	Yes/no
SARI Score	Grade 0–4	Experience of the anaesthetic staff	Years
		Duration of the anaesthesia	Minutes
		PONV prophylaxes with dexamethasone 4 mg iv	Yes/no
		PONV prophylaxes with ondansetron 4 mg iv	Yes/no