Archives - Part 5
Discriminating Measures and Normal Values for Expiratory Obstruction: Conclusion
In evaluating the cigarette-smoking effect in the NHANES III population, both the decreases in FEV1/FVC and increases in 1 — FEV3/FVC for a given age group are striking (Fig 3). Using either measurement, fractions progressively deteriorate with age relative to the never-smoking subjects. Consequently, by middle age current smokers have similar values to those of […]
read more from " Discriminating Measures and Normal Values for Expiratory Obstruction: Conclusion "
Discriminating Measures and Normal Values for Expiratory Obstruction: Discussion
Two prior studies have given reference values for FEV3/FVC. Each study used 200 to 300 nonsmoking white adults of northern European ethnicity. Over a broad age and height range, our mean FEV3/FVC values for white never-smokers are, on average, approximately 1.7% and 1.0% lower than those for men and women reported in the study by […]
read more from " Discriminating Measures and Normal Values for Expiratory Obstruction: Discussion "
Discriminating Measures and Normal Values for Expiratory Obstruction: Results
A total of 1,167 (ie, the sum of values from lines b to n, Table 3) of 3,570 smokers had abnormal patterns. Eight hundred one smokers had expiratory obstruction; 66% of smokers (530 of 801 smokers) [lines d to f, Table 3] had both early and late expiratory obstruction with or without possible restriction; 16% […]
read more from " Discriminating Measures and Normal Values for Expiratory Obstruction: Results "