End-Tidal Carbon Dioxide Monitoring for Spontaneous Pneumothorax

Table 3

Multivariate analysis of respiratory gases associated with SSP.

Respiratory gases	Odds ratio	95% CI	value
Room-air SpO2 (%)	0.837	0.638–1.098	0.200
Initial PaCO2 (mmHg)	1.094	0.945–1.267	0.227
Initial ETCO2 (mmHg)	0.824	0.697–0.974	0.023

SSP, secondary spontaneous pneumothorax; CI, confidence interval.