TABLE 5.

RESULT OF UNIVARIATE ANALYSIS INVESTIGATING THE ASSOCIATION BETWEEN TOTAL CYST VOLUME, DIAMETER, AND VOLUME OF LARGEST CYST, AND PRESENCE AND NUMBER OF PNEUMOTHORACES

	n*	Mean	SEM	Min.	Med.	Max.	p Value
Total cyst volume, cm3
Pneumothorax
No	150	8.1	2.0	0	0.8	195
Yes	48	29.2	8.0	0	7.6	270.2	< 0.0001 (W)
No. of pneumothoraces
0	150	8.1	2.0	0	0.8	195
1	17	9.1	3.9	0	5.1	68.1	< 0.0001
2	19	24.5	7.3	0.2	8.5	125.4	(J-T)
3+	12	65.0	27.4	1.2	10.3	270.2
Volume of largest cyst, cm3
Pneumothorax
No	129†	5.2	1.7	0	0.5	182.2
Yes	48	12.0	3.5	0	3.0	117.6	< 0.0001 (W)
No. of pneumothoraces
0	129	5.2	1.7	0	0.5	182.2
1	17	5.8	3.5	0	1.5	61.0	< 0.0001
2	19	12.7	5.5	0.1	2.7	98.5	(J-T)
3+	12	19.9	9.5	0.7	5.9	117.6
Diameter of largest cyst, cm
Pneumothorax
No	129	1.8	0.1	0.3	1.3	9.5
Yes	48	2.7	0.2	0.3	2.4	7.7	< 0.0001 (W)
No. of pneumothoraces
0	129	1.8	0.1	0.3	1.3	9.5
1	17	2.1	0.3	0.3	1.8	6.6	< 0.0001
2	19	2.7	0.4	0.8	2.3	6.0	(J-T)
3+	12	3.6	0.5	1.3	3.6	7.7

Definition of abbreviations: J-T = exact Jonckheere-Terpstra test; n = number of patients; W = Wilcoxon rank sum test;

^*Based on 177 patients with lung cysts.