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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)