. Author manuscript; available in PMC: 2010 Apr 6.

Published in final edited form as: Chest. 2008 Aug 8;135(1):48–56. doi: 10.1378/chest.08-0049

Table 3.

Univariate Odds Ratios-Among Asthmatics for Air Trapping

Variable	Odds Ratio (95% Confidence Interval)	Unit increase
FEV₁/FVC	1.64 (1.31–2.05)	5% decrease
Asthma Duration	1.36 (1.13–1.64)	5 year increase
Neutrophils above the median	2.21 (0.75.055)
History of Pneumonia	3.54 (1.45–8.60)
Atopy	5.09 (1.52–17.09)
Sex	0.43 (0.19–0.996)
FEV₁ % predicted	1.32 (1.16–1.50)	5% decrease
FVC % predicted	1.20 (1.05–1.36)	5% decrease
FeNO	0.85 (0.72–0.995)	10 unit increase
Smoking	1.29 (0.44–3.73)
Eosinophils above the median	0.80 (0.24–2.68)
Paternal history of allergies	0.58 (0.21–1.59)
Paternal history of asthma	1.07 (0.43–2.63)
GERD	2.07 (0.85–5.08)
Age	1.68 (1.17–2.40)	10 year increase
Oral Steroid Use	1.88 (0.74–4.82)