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Figure 1 Box plots showing median levels of B-type natriuretic peptide (BNP) after logarithmic transformation. (A) Control groups (patients with chronic stable heart failure (HF); and patients with no HF or lung disease) and patients with acute dyspnea, according to the final diagnosis. *p < 0.001 between decompensated congestive left-heart failure (CHF) group and others groups. **p < 0.05 between non–HF group and "non–HF, non–lung disease" group. (B) Various subgroups of CHF and non–CHF patients, according to normal or abnormal left ventricular ejection fraction (LVEF). **p < 0.05.