. Author manuscript; available in PMC: 2010 Jan 1.

Published in final edited form as: Acad Radiol. 2009 Jan;16(1):46–53. doi: 10.1016/j.acra.2008.05.020

Table 1.

Summary of the measurements; significant differences were found between the male and female subjects. The mean ± SD are shown for measurements.

	All (n=1071)^*	Male (n=267)	Female (n=164)	P-value^**
Age (years)	-	64 ± 7	62 ± 8	P < 0.005
Measurement
LA_TLC (mm²)	268 ± 64	296 ± 60	221 ± 38	P < 0.001
LA_RV (mm²)	224 ± 74	253 ± 70	179 ± 54	P < 0.001
ΔLA_avg (%)	16 ± 19	14 ± 17	19 ± 20	P < 0.03
ΔLA_max (%)	25 ± 20	22 ± 19	28 ± 21	P < 0.003
Number of Subjects with Maximal Trachea Collapse
≥28%	27.7% (n=297)	21.3% (n=57)	35.4% (n=58)
≥50%	13.4% (n=143)	10.5% (n=28)	17.1% (n=28)
≥70%	5.1% (n=55)	4.9% (n=13)	6.7% (n=11)

Age and gender information was available for only 431 of the 1071 subjects in the emphysema cohort.

^**

Two-sample Wilcoxon rank-sum (Mann-Whitney) test between male and female