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. Author manuscript; available in PMC: 2011 Jun 1.
Published in final edited form as: Respir Med. 2010 Jan 4;104(6):858–864. doi: 10.1016/j.rmed.2009.12.006

Table 4.

Comparison of Participants with All Exhalation Times < 6 Seconds at Both Years 0 and 5 versus All < 6 Seconds only at Year 0

Short
Exhalations		 Year 0 and Year 5 Year 0 Only
Number (%
of total)		 446 (10.5%) 1198 (28.0%)
Age – years
(at Year 0)		 24.0 ± 3.7 24.4 ± 3.7
White (%) 227 (50.9%) 585 (48.8%)
Female (%) 309 (69.7%)* 726 (60.6%)*
BMI Y0: 22.5 ± 4.1
Y5: 23.6 ± 4.8# 		Y0: 23.3±4.1
Y5: 25.2±5.1 t
FEV1 - %
predicted		 Y0: 99.3 ± 11.2
Y5: 101.4 ± 14.4** 		Y0: 98.6 ± 11.5
Y5: 99.4 ± 12.4
FVC - %
predicted		 Y0: 91.8 ± 12.8
Y5: 93.9 ± 14.1** 		Y0: 94.7 ± 12.8
Y5: 96.9 ± 13.7t

Mean ± SD unless otherwise noted

*

p < 0.0001 compared to males

**

p < 0.05,

#

p < 0.0003,

t

p < 0.0001 compared to year 0