The skill of tracheal intubation with rigid scopes – a randomised controlled trial comparing learning curves in 740 intubations

Table 3 Effects on overall time to successful intubation (in seconds)

	Crude model		Adjusted model
	Geometric mean ratio (95% CI)	p-value	Geometric mean ratio (95% CI)	p-value
Device (SensaScope vs. Bonfils)	1.23 (1.12–1.36)	< 0.001	1.23 (1.12–1.36)	< 0.001
Trial	0.95 (0.94–0.96)	< 0.001	0.95 (0.93–0.96)	< 0.001
Mallampati (III/IV vs I/II)			1.06 (0.90–1.26)	0.47
BMI (per unit increase)			1.00 (0.99–1.01)	0.79
Consultant vs. registrar			0.98 (0.81–1.19)	0.85
Intercept	82.2 (72.9–92.7)	< 0.001	80.1 (60.3–106.4)	< 0.001

Effects expressed as geometric mean ratio and 95% confidence intervals (CI) from a crude model with device and trial number and an adjusted model with Mallampati score, BMI, and physician (consultant vs. registrar)

ISSN: 1471-2253