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Table 4 Main statistical parameters related to VOCs selected by the final predictive model to discriminate between 65 subjects with pancreatic ductal adenocarcinoma (PDA) and 102 controls (data in ppb)

From: Pancreatic ductal adenocarcinoma can be detected by analysis of volatile organic compounds (VOCs) in alveolar air

  Ammonia M34 M43 M44 M62 Sulfur dioxide M71 M74 M89 M112
Control subjects
 Median 91.0 19.4 1025.7 7220.3 7.3 11.0 31.9 7.9 1.3 8.9
 Geometrical Mean 88.8 18.7 1023.9 6576.8 7.5 10.4 36.1 9.4 1.5 9.6
 Minimum value 13.8 9.4 288.8 2879.3 2.3 4.9 12.5 2.2 0.1 2.8
 Maximum value 459.6 29.5 2697.8 14,011.8 41.7 14.5 186.9 383.5 15.2 152.6
 Arithmetic mean 106.5 19.2 1087.5 6918.8 8.7 10.6 44.5 17.4 2.2 12.0
 Standard deviation 72.9 4.0 397.8 2115.9 5.7 2.0 36.1 41.7 2.5 15.4
Patients with PDA
 Median 106.7 12.4 1195.7 6106.7 5.7 6.0 42.2 8.4 3.5 14.0
 Geometrical Mean 118.2 12.8 1337.8 6141.6 6.3 6.9 41.2 9.6 3.4 14.5
 Minimum value 33.4 8.5 402.4 3521.3 1.9 3.1 15.4 1.9 0.3 6.1
 Maximum value 737.0 30.4 13,697.7 10,436.8 33.1 16.7 179.1 130.9 42.1 71.4
 Arithmetic mean 136.7 13.3 1874.4 6371.2 7.7 7.7 49.4 16.2 5.7 16.7
 Standard deviation 102.8 4.4 2109.5 1749.0 6.0 3.6 34.5 22.5 6.9 10.9