Chest · 2007
Body mass index and response to emergency department treatment in adults with severe asthma exacerbations: a prospective cohort study.
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Rodrigo Gustavo J, Plaza Vicente
Аннотация
BACKGROUND: In acute asthma (AA), overweight/obesity (body mass index [BMI]>or=25 kg/m2) have been related to poorer outcomes and higher risk of complications.
METHODS: We designed a prospective cohort study to determine if overweight/obese adults with severe episodes of AA require longer duration of emergency department (ED) treatment and have higher hospitalization rates compared with underweight/normal asthmatics (BMI<25 kg/m2). All patients received inhaled albuterol (maximum 6 h). Patients were discharged or admitted according to standard accepted criteria. The weight and height of each patient were measured during the ED stay.
RESULTS: Four hundred twenty-six patients (mean, 33.4+/-11.5 years [+/-SD]; 63% women) with severe exacerbations (FEV1, 28.2+/-11.9% of predicted) were enrolled. One hundred sixty-three patients (38.3%) were classified as overweight/obese. Patients with BMI>or=25 kg/m2 showed significant increases in length of ED stay (2.3 h vs 1.9 h, p=0.01) and rate of hospitalization (13.7% vs 6.8%, p=0.02), despite adjustments for other confounding variables. They also presented a higher rate of use of inhaled steroids and theophylline within the past 7 days. At the end of treatment, overweight/obese patients displayed more wheezing. Multivariate analysis demonstrated that BMI>or=25 kg/m2 resulted unrelated to final change in peak expiratory flow from baseline. By contrast, BMI>or=25 kg/m2 was related with duration of ED treatment (p=0.002).
CONCLUSIONS: Overweight/obese patients were admitted to the hospital more frequently than underweight/normal patients. This may reflect a difference in the perception of dyspnea, or it may reflect an underlying difference in asthma severity between the two groups.
METHODS: We designed a prospective cohort study to determine if overweight/obese adults with severe episodes of AA require longer duration of emergency department (ED) treatment and have higher hospitalization rates compared with underweight/normal asthmatics (BMI<25 kg/m2). All patients received inhaled albuterol (maximum 6 h). Patients were discharged or admitted according to standard accepted criteria. The weight and height of each patient were measured during the ED stay.
RESULTS: Four hundred twenty-six patients (mean, 33.4+/-11.5 years [+/-SD]; 63% women) with severe exacerbations (FEV1, 28.2+/-11.9% of predicted) were enrolled. One hundred sixty-three patients (38.3%) were classified as overweight/obese. Patients with BMI>or=25 kg/m2 showed significant increases in length of ED stay (2.3 h vs 1.9 h, p=0.01) and rate of hospitalization (13.7% vs 6.8%, p=0.02), despite adjustments for other confounding variables. They also presented a higher rate of use of inhaled steroids and theophylline within the past 7 days. At the end of treatment, overweight/obese patients displayed more wheezing. Multivariate analysis demonstrated that BMI>or=25 kg/m2 resulted unrelated to final change in peak expiratory flow from baseline. By contrast, BMI>or=25 kg/m2 was related with duration of ED treatment (p=0.002).
CONCLUSIONS: Overweight/obese patients were admitted to the hospital more frequently than underweight/normal patients. This may reflect a difference in the perception of dyspnea, or it may reflect an underlying difference in asthma severity between the two groups.