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Table 3 Ductal Adenocarcinoma Model obtained from the first and second LASSO logistic regression (n = 167)

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

Variables Regression Coefficients of the first LLRa Regression Coefficients of the second LLRb 95% CIb
Intercept −5.3255467964 −4.832765 −19.837 – + 4.153
Age + 0.1493804071 + 0.119876 + 0.032 – + 0.403
Ammonia + 0.0036286701 + 0.001723 + 0.000 – + 0.023
M34 −0.1699431526 − 0.102787 − 0.402 – + 0.000
M37 + 0.0006675672 // //
M42 + 0.0009076002 // //
M43 + 0.0007153015 + 0.002183 −0.006 – + 0.005
M44 + 0.0047526254 + 0.001295 + 0.001 – + 0.051
M46 −0.0007407600 // //
M60 −0.0003390278 // //
Propanol + 0.0054942415 // //
M62 −0.2138505207 −0.335321 −1.007 – − 0.077
Sulfur dioxide − 0.2595054348 −0.384319 − 1.116 – − 0.132
M66 − 0.1459224298 // //
M71 + 0.0062530914 + 0.012486 + 0.000 – + 0.040
M74 −0.0120892660 −0.021012 − 0.159 – + 0.000
M75 − 0.0008072235 // //
M88 −0.0142597155 // //
M89 + 0.2297944263 + 0.426043 + 0.536 – + 2.368
M91 −0.0286331109 // //
M106 −0.0135291587 // //
M111 + 0.0926572905 // //
M112 + 0.0054448431 + 0.023171 + 0.000 – + 0.230
  1. CI confidence interval, obtained from a 10-fold iteration Bootstrap procedure
  2. aRegression Coefficients of the first LASSO logistic regression (2nd column)
  3. bRegression coefficients of the Ductal Adenocarcinoma Model obtained from the second, iterated LASSO logistic regression (3rd and 4th columns)