Z-Scores

Z-Scores

In paediatric studies, z-scores standardise cardiac measurements against a patient’s growth parameters and reference populations.

When configured in HeartLab, z-scores appear automatically alongside supported measurements during review and reporting, helping clinicians quickly assess whether structures are:

• Within normal range
• Enlarged
• Abnormally small

This provides immediate clinical context directly within the workflow.

Applies to

Configuration

• Administrators

Usage

• Paediatric clinicians
• Users reviewing supported paediatric measurements

Configure Z-Scores

By default, z-scores are disabled.

To configure z-scores:

1. Navigate to Settings → Measurements → Z-Scores.
2. Locate the desired measurement.
3. Select the publication dropdown.
4. Choose the desired reference publication.

To view additional information about a publication:

1. Hover over the Citation (Book) icon beside the publication.

This displays information such as:

• Publication details
• Applicable patient age ranges

View Z-Scores in Studies

Once configured, z-scores automatically appear within the measurement card for supported measurements.

If the patient’s age falls within the valid range of the selected publication:

• The z-score is displayed automatically during review and reporting.

Add Z-Scores to Report Templates

Z-scores can also be included within report templates.

Measurement Fields

When configuring a measurement field within a report template:

1. Select the Z-Score option alongside:
   • Unindexed values
   • BSA-indexed values

Reporting Calculations

When using:

• measurement.format()
• measurement.getValue()

within reporting calculations, specify:

indexing: "zScore"