Skip to main content
Fig. 4 | European Journal of Medical Research

Fig. 4

From: Comparison of the lower limit of normal to the fixed ratio method for the diagnosis of airflow obstruction at high altitudes: a large cross-sectional survey of subjects living between 3000–4700 m above sea level

Fig. 4

Prevalence of small airway obstruction in each group. Values are shown as mean ± 95% confidence interval. SAO, small airway obstruction. It was defined as at least two of maximal mid-expiratory flow, forced expiratory flow (FEF) 50% and FEF 75% having below 65% of the predicted values. Data missing for FR−/LLN− group (n = 31), and FR−/LLN+ group (n = 1)

Back to article page

European Journal of Medical Research

ISSN: 2047-783X

Contact us