Table 4.

Modification of the effect of avoiding NMBA in the analysis excluding patients who underwent intubation during CPR

	Using NMBA			Avoiding NMBA			OR (95% CI); within strata of risk status	p value
	n with/without outcome	OR (95% CI)	p value	n with/without outcome	OR (95% CI)	p value
Low risk	16/233	Reference		3/16	1.69 (0.37–7.72)	0.50	1.69 (0.37–7.72)	0.50
High risk	29/87	3.99 (1.94–8.18)	< 0.001	8/9	11.45 (3.56–36.82)	< 0.001	3.24 (1.04–10.07)	0.04

ORs are adjusted for age, sex, neck mobility limitation, abnormal facial shape, airway obstruction

High-risk status: post cardiac arrest, cerebral bleeding, infection of the central nervous system, epilepsy, convulsion, altered mental status (e.g. metabolic encephalopathy), spinal cord injury, traumatic brain injury, and respiratory disease

CPR cardiopulmonary resuscitation, NMBA neuromuscular blocking agent, OR odds ratio, CI confidence interval