Table 3 Rotated component matrix and weight factors of principal component analysis (PCA). Δ max indicates difference from baseline to maximum value and Δ min difference to minimum value. Only weight factors greater than 0.4 or smaller than −0.4 are shown.

From: Effects of snow properties on humans breathing into an artificial air pocket – an experimental field study

Variable

Breath factor

Gas factor

Blood pressure factor

Δ max VE

0.928

  

Δ max VT

0.740

  

Δ max BR

0.735

  

Δ max HR

0.577

−0.496

 

Δ min SpO2

 

0.850

 

Δ min O2 pocket

 

0.905

 

Δ min pO2

 

0.794

 

Δ max pCO2

 

−0.796

 

Δ max CO2 pocket

 

−0.707

 

Δ max SBP

  

0.923

Δ max DBP

  

0.945

Δ max etCO2

0.612

−0.443

 
  1. BR, breathing rate; DBP, diastolic blood pressure; etCO2, end tidal CO2; HR, heart rate; pCO2, partial pressure of CO2; pO2, partial pressure of O2; SpO2, peripheral oxygen saturation; SBP, systolic blood pressure; VE, minute respiratory volume; VT, tidal volume.
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