Source: https://guthlabs.ai/docs/instruments/ideal-adjusted-body-weight/

instrument / verified-clean

# Ideal/Adjusted Body Weight

The current ledger marks this instrument verified clean within the source-bound verification corpus.

Status: **VERIFIED_CLEAN**Lifecycle: **verified-clean**

## Inspectable records

[01**Overview**Purpose and lifecycle](<https://guthlabs.ai/docs/instruments/ideal-adjusted-body-weight/>)[02**Mechanism**Method and assumptions](<https://guthlabs.ai/docs/instruments/ideal-adjusted-body-weight/mechanism/>)[03**Implementation**Binding and validation](<https://guthlabs.ai/docs/instruments/ideal-adjusted-body-weight/implementation/>)[04**Qualification**Evidence and errata](<https://guthlabs.ai/docs/instruments/ideal-adjusted-body-weight/qualification/>)

## Ledger state

The current ledger marks this instrument verified clean within the source-bound verification corpus.

**Area**: Biology, Medicine & Pharmacology (educational estimates only — every panel labeled not-medical-advice)

**Tranche**: tranche-3

**Evidence ID**: t3-002

**Ledger rows**: 1

No ledger note is attached.

## Review findings

The existing educational-reference and not-medical-advice label is appropriate, but IBW and AdjBW are method-dependent estimates and are not universally valid dosing weights. Drug-specific dosing rules, clinical judgment, and local protocols may use different formulas or correction factors.

### Formula and scope findings

- The Devine IBW formulas are standard when height is measured in total inches and body weight is in kilograms.

- The specification does not define behavior for height below 60 inches: it must state whether the formula is extrapolated using a negative inches-over-60 value or whether the excess is clamped at zero.

- The sex input is ambiguous: only Men and Women constants are provided, with no defined mapping for nonbinary, intersex, or unspecified inputs.

- The specification does not explicitly state that ActualBW must be in kilograms, so unit consistency is not guaranteed.

### Unit assumptions

- Height must be total inches for direct use in the formula; if entered in centimeters, convert using inches = centimeters / 2.54.

- Actual body weight, IBW, and AdjBW are assumed to be in kilograms.

- The 60-inch reference is exactly 5 feet.

- The 0.4 adjustment factor is dimensionless.

- Devine constants 50 kg and 45.5 kg are applied to men and women, respectively.

## Boundary hardening

**BREAK_CLAIMED** · SELF_FLAGGED

The extreme-magnitude vector produces Infinity and NaN through floating-point overflow and Infinity plus negative Infinity. The convention probe also exposes an input-validation hazard when height units are omitted or ambiguous.

## Errata and corrections

No applied erratum is attached to this unique-name record.

## Inspectable example

4 review vectors are recorded. One source-bound sample is shown below.

````
{
  "inputs": {
    "sex": "man",
    "height": 60,
    "height_unit": "in",
    "actual_weight": 50,
    "weight_unit": "kg"
  },
  "expected_outputs": {
    "IBW_kg": 50,
    "AdjBW_kg": 50
  },
  "working": "Inches over 60 = 60 - 60 = 0. IBW = 50 + 2.3 × 0 = 50 kg. ActualBW - IBW = 50 - 50 = 0 kg. AdjBW = 50 + 0.4 × 0 = 50 kg."
}
````

## Related workflows

[Metabolic Health Suitedosing/goal weight](<https://guthlabs.ai/docs/instrument-workflows/metabolic-suite/>)

## Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

- `VERIFIED_LEDGER.json · VERIFIED_CLEAN`

- `evidence-tranche3/tranche3-results.json`

- `BOUNDARY_HAZARD_CATALOG.json`