. Author manuscript; available in PMC: 2017 Oct 23.

Published in final edited form as: J Vasc Interv Radiol. 2015 Mar 5;26(7):1052–1058. doi: 10.1016/j.jvir.2015.01.016

Table 3.

Univariate Analysis of Factors Predicting Pneumothorax after Microwave Ablation

	Odds Ratio	Confidence Interval	P Value
Ablation power (W)	1.0	0.97–1.04	.94
Temperature (°C)	1.0	0.95–1.03	.66
Probe geometry (perpendicular vs parallel)	2.8	0.78–9.71	.11
Probe angle (°)	1.0	1.00–1.04	.11
Emitting point to pleural puncture distance (cm)	0.6	0.35–1.16	.14
Emitting point to closest pleura distance (cm)	0.5	0.12–2.38	.42
Ablation zone includes pleural puncture site (yes vs no)	4.1	1.00–16.7	.05
Ablation zone long axis (cm)	0.6	0.23–1.64	.33
Ablation zone short axis (cm)	0.4	0.10–1.65	.21
Ablation zone area (cm²)	0.8	0.55–1.12	.18
Pleural contact with ablation zone (cm)	0.9	0.54–1.55	.74
No. ablations in each lung	1.5	1.03–2.28	.04
Time since intubation (h)	2.8	1.33–5.84	.01