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Fig. 1 | BMC Pulmonary Medicine

Fig. 1

From: Chronic airflow obstruction in Tanzania – a cross-sectional study

Fig. 1

Chronic airflow obstruction in relation to severity of symptoms: post-bronchodilator median FEF25–75 (l/s.) and FEV1 in patients without restriction by symptom severity (0 no symptoms, 3 severe symptoms). Boxplot shows median & interquartile ranges and whiskers denote the furthest point within 1.5× interquartile range. Number of subjects in severity groups (from 0 to 3): shortness of breath n = 331, 140, 67, 13; coughing n = 447, 75, 20, 9; limitation of daily activities or at work n = 409, 84, 43, 15; limitation of activities at home n = 418, 81, 38, 14, respectively. Note: the symptom “coughing” was assessed in 4 severity grades. Only one participant graded coughing with severity 4; this participant and was removed from the figure, as no boxplot could be drawn from a single value. The patient had a FEF25–75 of 1.99 l/s and a FEV1/PRED of 76.39%

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