Reference values for pulmonary function in Asian Indians living in the United States.
OBJECTIVE
To establish reference values for pulmonary function in the Asian-Indian population living in the United States.


METHODS
Five-year cross-sectional study of pulmonary function in healthy adult Asian Indians living in the United States, using American Thoracic Society guidelines for measuring pulmonary function.


METHODS
Measurement of pulmonary function in healthy nonsmoking Asian Indians in a pulmonary function laboratory or at festivals, picnics, and ceremonies where subjects could be conveniently recruited.


METHODS
Four hundred sixty subjects from a population of Asian Indians residing in the Chicago metropolitan area.


METHODS
Spirometry was performed in all subjects with measurements of FEV(1), FVC, and forced expiratory flow between 25% and 75% of vital capacity (FEF(25-75)). Lung volumes were measured in eighty subjects. Prediction equations for FEV(1), FVC, and FEF(25-75) were derived using multiple regression analysis.


RESULTS
Three hundred sixty-three subjects (226 men and 137 women) met the inclusion criteria. Spirometric values derived from our prediction equations, when compared to the values for whites from the selected studies in the literature, showed FVC to be 20 to 24% lower in men and 25 to 28% lower in women. FEV(1) was 16 to 23% lower in men and 20 to 26% lower in women. Differences were not quite as large when compared to values from African Americans and other studies on Asians.


CONCLUSIONS
We provide reference values for pulmonary function in nonsmoking Asian Indians living in the United States. These reference values should be used for evaluation of pulmonary function in this population.
Pulmonary Division, VA Medical Center, VA Great Lakes Health Care System 111-P, 3001 Green Bay Road, Chicago, IL 60064, USA.
Ashok
A
Fulambarker
Ahmet Sinan
AS
Copur
Asavari
A
Javeri
Sujata
S
Jere
Mark E
ME
Cohen
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D005260:Female; D006801:Humans; D007194:India / Q000208:ethnology; D008297:Male; D008875:Middle Aged; D012016:Reference Values; D012129:Respiratory Function Tests; D013147:Spirometry; D014481:United States / Q000453:epidemiology; D014797:Vital Capacity