In logistic regression analysis adjusting for confounding, parental atopy alone increased the risk of bronchial obstruction [odds ratio 1.62; 95% confidence interval (CI) 1.10-2.40] asthmathma (1.66; 95% CI, 1.08-2.54).
Moreover, total obstruction episode ratios were as follows: CC, 1 in 107.21 episodes/patient-month; CT, 1 in 74.08 episodes/patient-month; and TT, 1 in 50.33 episodes/patient-month.
It should be stressed, however, that the typical marker for airway obstruction (the FEV0.1 FVC ratio) was not affected in our model.
A range of Reynolds numbers (channel Re = 100 − 200) and obstruction opening area ratios (β = 0.2 − 0.5) were investigated through Particle-Image Velocimetry and infrared thermography of a Joule-heated foil.
Since the spirometric definition of airway obstruction relies on the ratio, the fact that the GLI predicted ratios are higher means that the prevalence of obstruction may be overestimated in Sweden.
3 5 6 17 A participant was identified as having 'airflow/lung/spirometric obstruction' if the FEV1/FVC ratio was
25, 26 A recent multicenter, cross-sectional study by Yawn et al determined the percentage of patients with airway obstruction (post-bronchodilator FEV1/FVC ratio ≤ 0.70) compared with those without airway obstruction (post-bronchodilator FEV1/FVC ratio > 0.70) and confirmed 26% patients with airflow obstruction consistent with COPD.
The calculated global and local sensitivity indices on the cooling energy prove that the window solar heat gain coefficient, window to ground ratio, external obstruction and overhang projection fraction are the four most influential passive design factors.
Participants with persistent airways obstruction (post-bronchodilator FEV1/FVC ratio less than 0.70) [ 28] were identified.
Despite the frequency of cough (42.8%), wheeze (15.1%), and chest tightness (15.4%) and the common diagnoses of asthma/reactive airways dysfunction, only 7.6% of all responders showed airway obstruction, defined as a ratio of forced expiratory volume in 1 sec (FEV1) to forced vital capacity (FVC) less than the 5th percentile of the reference population.
