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. 2021 Dec 31;142:105192. doi: 10.1016/j.compbiomed.2021.105192

Table 8.

Covariance matrix for intubated patients.

Σ1 BFM SpO2M SpO2min SpO2-90
BFM 46.4 −1.9 −6.6 0.11
SpO2M −1.9 7.5 8.5 −0.60
SpO2min −6.6 8.5 27.2 −0.38
SpO2-90 0.11 −0.60 −0.38 0.06