Description
Orient supplied research effect changes under an explicit sign convention without efficacy interpretation.
A pharmacodynamic model relates an exposure or occupancy measure to a response under explicitly supplied parameters. Baseline, maximum increment, half-maximal concentration, effect direction, and observation windows have distinct meanings. Evaluating one model term does not fit the curve or establish its clinical validity.
Orient supplied research effect changes under an explicit sign convention without efficacy interpretation.
When to use this tool
Use PD Effect Baseline Sign Reference when you need this particular response-model term, scale conversion, panel duration, or support calculation.
How to use the tool and how it works
- Enter effect, baseline, reductionIsPositive. Use the units and conventions below.
- Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
- Read signedChange. Use the output convention below.
Return signedChange=effect-baseline, reversing its sign when reductionIsPositive.1
| Input field | Meaning and units | Accepted input |
|---|---|---|
| effect | Effect | Required. Finite number. |
| baseline | Supplied response level at the model's zero-effect baseline. | Required. Finite number. |
| reductionIsPositive | Reduction Is Positive | Required. Boolean. |
| Output field | Interpretation | Returned shape |
|---|---|---|
| signedChange | Signed Change | Required. Finite number. |
{
"input": {
"effect": 6,
"baseline": 10,
"reductionIsPositive": true
},
"output": {
"signedChange": 4
}
}Limitations and assumptions
- Effect and baseline need a common scale. The flag selects a reporting direction; no desirable effect, mechanism, statistical significance, or clinical benefit is inferred.
- Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
- Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Signed zero is exported as zero.
Alternative or Complementary methods
Use a fitted and validated response model when a supplied local term is insufficient. Check exposure units, response direction, baseline, model assumptions, and observation support before comparing effects.
References
Similar or alternative tools
- PD Baseline Normalized Effect Fraction
Normalize a supplied response between baseline and maximum, retaining values outside the reference interval.
- Effect Curve Time Lag Sign
Classify an explicit nonclinical response time offset without a causal pharmacodynamic inference.