Table 2.

Relationship of risk events to pneumothorax.

Risk events	Cases (n = 10)		Controls (n = 20)		OR	95% CI	P value
	n	%	n	%
Endotracheal suctioning	6	60	6	30	3.5	0.7–17.1	0.05
Mean airway pressure change	4	40	2	10	6.0	0.8–41.4	0.052
Reintubation	6	60	2	10	13.5	1.9–93.2	0.003
Bagging	5	50	2	10	9.0	1.3–61.1	0.015

OR: odds ratio; CI: confidence interval.