Table 1

The mathematical model formula and coefficient of determination for all models used to evaluate the relationship between permeability (x) and CO2RB (y)

ModelR2
y=ax+ k0.28
y=ax2+bx+ k0.28
y=ax3+bx2+cx+ k0.31
y=ax4 + bx3+cx2+dx+ k0.36
y=zln(x)+k0.16
y=aex 0.36
y=axb 0.20
  • CO2RB, carbon dioxide rebreathing.