Why This Property Exists

When modelling multifactorial conditions, not all contributing factors are equal from a clinical perspective. Some factors can be changed through intervention (diet, medication adherence), some cannot (age, genetics), and some fall in between (chronic conditions that can be managed but not eliminated).

This distinction is critical for:

• Clinical prioritisation: Focus intervention efforts where they can actually make a difference
• Patient counselling: Set realistic expectations about what can and cannot be changed
• Treatment planning: Design protocols that address modifiable factors whilst accounting for non-modifiable ones
• Risk stratification: Distinguish between actionable and inherent risk factors

Schema.org's MedicalRiskFactor can identify risk factors but provides no way to indicate whether they're actionable. The modifiable property fills this gap.

Domain and Range

Used On (Domain)

Expected Values (Range)

Value Semantics

The three-state system captures the clinical reality that modifiability isn't always binary:

Why "partial" Instead of a Scale

We considered a numeric scale (0-1) or enumeration (none/low/moderate/high) but found that:

• Clinical decisions typically need categorical guidance, not granular scores
• The three states map directly to distinct clinical actions: target, accommodate, or manage
• More granularity would require evidence that often doesn't exist

Usage Guidance

Do

• Use true for directly actionable factors—things a patient or clinician can change through specific intervention
• Use false for inherent characteristics—things that are fixed or determined at birth/diagnosis
• Use "partial" when management is possible but elimination isn't—chronic conditions, lifestyle factors with biological constraints
• Pair with interventions—when modifiable is true or "partial", specify what actions can be taken

Don't

• Omit for non-modifiable factors—explicitly stating false is informative; silence is ambiguous
• Confuse difficulty with impossibility—smoking cessation is difficult but modifiable (true); age is easy to understand but non-modifiable (false)
• Use "partial" as a hedge—reserve it for genuinely intermediate cases, not uncertainty about whether something is modifiable

Edge Cases

• Medication effects: If a patient takes antiplatelet medications, is this modifiable? Use true with a caveat in the interventions noting it requires physician approval and may not be safe for all patients.
• Severe obesity: Technically modifiable but with significant barriers. Use true but acknowledge in mechanism or interventions that sustained change is challenging.
• Baseline tissue damage: Cannot be undone, but severity of future damage may be reduced. Use "partial".

Examples

Example 1: Clearly Modifiable Factor

Protein intake in hair loss risk:

{
  "@type": "ContributingFactor",
  "factorName": "Inadequate protein intake",
  "importance": "Major",
  "factor": {
    "@type": "MedicalRiskFactor",
    "name": "Protein intake below 1.2 g/kg daily"
  },
  "mechanism": "Hair is 90% protein (keratin); insufficient protein means follicles lack building blocks for hair shaft synthesis",
  "modifiable": true,
  "interventions": [
    "Calculate individual requirements: 1.2-2.0 g/kg daily",
    "Track intake meticulously for at least 3 days",
    "Consider protein supplementation if whole food intake insufficient"
  ]
}

Why true: Protein intake is entirely within patient control. The intervention is clear, measurable, and directly addressable.

Example 2: Non-Modifiable Factor

Female gender in GLP-1 medication hair loss:

{
  "@type": "ContributingFactor",
  "factorName": "Female gender",
  "importance": "Major",
  "factor": {
    "@type": "MedicalRiskFactor",
    "name": "Female gender, especially post-menopausal"
  },
  "mechanism": "Hormonal complexity with less margin for error in sex hormone balance; rapid weight loss affects SHBG levels altering free testosterone",
  "prevalence": "7.1% of females vs 0.5% of males in clinical trials; 14-fold increased risk",
  "modifiable": false
}

Why false: Biological sex cannot be changed. This factor must be accommodated in treatment planning, not targeted for intervention. Note there's no interventions property—there's nothing to do about this factor directly.

Example 3: Partially Modifiable Factor

Chronic health conditions affecting treatment response:

{
  "@type": "ContributingFactor",
  "factorName": "Chronic health conditions",
  "importance": "Moderate",
  "factor": {
    "@type": "MedicalRiskFactor",
    "name": "Conditions affecting healing capacity"
  },
  "mechanism": "Poorly controlled diabetes impairs multiple aspects of wound healing and tissue regeneration; conditions affecting circulation, immunity, or cellular metabolism reduce tissue responsiveness to growth factors",
  "modifiable": "partial",
  "interventions": [
    "Optimisation of underlying health conditions prior to treatment",
    "May require longer treatment courses or additional sessions"
  ]
}

Why "partial": The chronic condition itself cannot be eliminated, but its impact on treatment outcomes can be reduced through better disease management. The patient can improve glycaemic control, but they cannot cure their diabetes.

Example 4: Modifiable with Caveats

Medication effects on platelet function:

{
  "@type": "ContributingFactor",
  "factorName": "Medication effects",
  "importance": "Moderate",
  "factor": {
    "@type": "MedicalRiskFactor",
    "name": "Antiplatelet or anticoagulant medications"
  },
  "mechanism": "Aspirin irreversibly inhibits COX-1 enzymes in platelets, reducing aggregation and potentially affecting growth factor release",
  "modifiable": true,
  "interventions": [
    "Temporary discontinuation of medications (if medically safe) prior to treatment",
    "Timing of treatment relative to medication doses",
    "Requires physician approval—not all patients can safely discontinue"
  ]
}

Why true not "partial": The medication can be stopped entirely (unlike a chronic condition). The caveat about safety belongs in interventions, not in the modifiability classification.

Related Properties

Often Used With

• interventions — Specific actions that can modify this factor (when modifiable is true or "partial")
• mechanism — How this factor contributes to the outcome
• importance — How significant this factor is relative to others
• factor — The underlying risk factor being described

Parent Type

• ContributingFactor — The type on which this property is used
• MultifactorialCondition — The broader context in which contributing factors appear