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Sign combinations of parameters in the sigmoidal model
| Case | Ppf + B | C | K2 |
|---|---|---|---|
| 1 | + | + | + |
| 2 | + | − | − |
| 3 | − | + | − |
| 4 | − | − | + |
Ppf, RV passive filling pressure. The impact of any individual sigmoidal parameter on the overall shape of the curve depends not only on its own value, but also on those taken by the other parameters. For comparability and consistent interpretation of changes in the sigmoidal model parameters, investigators must commit to one of the four parameter combination cases shown.
