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Table 1 Clinical characteristics of study population (n = 663)

From: Amino acids predict prognosis in patients with acute dyspnea

Age years mean ± SD

71.54 ± 17.3

Sex Female (%)

354 (53.4)

METTS-Aa (%)

45 (6.8) / 305 (46.0) / 238 (35.9) / 75 (11.3)

Oxygen saturation % mean ± SD

93.4 ± 6.4

Respiratory Rate mean ± SD

24.3 ± 6.9

CRP mg/l median (IQR)

10 (3.6–36)

Lactate mmol/l median (IQR)

1.5 (1.2–2.1)

eGFR ml/min median (IQR)

62.1 (43–78.8) 4 unknown

CHF (%)

231 (34.8) 3 unknown

COPD (%)

203 (30.6) 4 unknown

Smokingb (%)

193 (29.1) / 338 (51.0) / 115 (17.3) 15 unknown

  1. a4 categories of METTS-A priority 4/3/2/1 least critical to most critical
  2. b3 categories non-smokers/former smokers/active smokers