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

Published in final edited form as: J Allergy Clin Immunol. 2009 Jun;123(6):1328–34.e1. doi: 10.1016/j.jaci.2009.04.005

Table 4.

BMI category and physiologic and clinical characteristics of asthma.

Variable	BMI < 25^*	BMI ≥ 30^*	Crude p	Adjusted p^*
FEV₁ (L, prebronchodilator) (n=593/279)	3.05 [2.98, 3.11]	2.78 [2.69, 2.86]	<0.0001	<0.0001
FEV₁ (%, prebronchodilator) (n=593/279)	83.5 [82.4, 84.5]	81.4 [80.0, 82.8]	0.0003	0.01
FEV₁/FVC (%)(n=593/279)	72.7 [71.8, 73.5]	72.2 [71.0, 73.4]	0.3	0.5
Morning peak expiratory flow (L/min) (n=592/278)	436.6 [426.6, 446.5]	432.0 [418.4, 445.6]	0.2	0.6
Daily rescue albuterol use (puffs) (n=590/277)	1.08 [0.98, 1.19]	1.27 [1.13, 1.43]	0.06	0.01
PC₂₀ methacholine (mg/mL) (n=531/251)	0.98 [0.83, 1.15]	1.23 [1.01, 1.5]	0.01	0.03
Exhaled nitric oxide (ppb) (n=300/163)	16.3 [14.7, 18.2]	13.8 [12.2, 15.7]	0.02	0.02
Total number of positive skin tests (n=523/258)	5.23 [4.94, 5.52]	5.48 [5.09, 5.86]	0.2	0.3
Asthma-related quality of life (n=492/234)	5.75 [5.67, 5.84]	5.46 [5.35, 5.57]	<0.0001	<0.0001
Mini-ACQ score (n=206/125)	1.11 [1.01, 1.22]	1.12 [0.99, 1.25]	0.5	0.9

n reported for BMI<25/BMI≥30.

Means and p values after adjustment for study, age, gender and race.

ACQ = Asthma Control Questionnaire.