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Table 1 Sums of the squared errors between the estimated and true ventilation-to-volume ratio distributions

From: Generalized estimation of the ventilatory distribution from the multiple-breath washout: a bench evaluation study

  Single compartment (1C) Four compartments (4C)
50% N2 step 50% N2 step 10% N2 step
Generalized constrained 0.19 ± 0.15 0.07 ± 0.03 0.08 ± 0.006
Generalized unconstrained 0.55 ± 0.15 0.12 ± 0.01 0.12 ± 0.004
Classical 1.21 ± 0.03 0.16 ± 0.01 0.16 ± 0.003
Classical + inspired fraction 1.20 ± 0.02 0.15 ± 0.02 0.16 ± 0.002