Abbreviated Mental Test (AMT-4) Calculator

Abbreviated Mental Test (AMT-4) Calculator for Geriatrics. The 4AT developer describes its separate item coding at https://www.the4at.com/userguide. Original AMT-4 values below four warrant follow-up; four correct does not demonstrate intact memory, executive function or decision-making capacity.

For shared guidance on choosing a tool and documenting results, read the clinical calculator workflow.

How this calculator works

The 1997 original study evaluated a four-point correct-answer count: https://journals.sagepub.com/doi/pdf/10.1177/026921559701100308. This page records that count only, with no test questions reproduced.

When to use this calculator

Clarify a referral that reports “AMT4 2”. The same abbreviation also labels an item within the 4AT, whose coding differs. Check which convention the assessor used.

Inputs used

  • Externally established correct-answer count, 0-4
  • Confirmation of original AMT-4 scoring rather than 4AT coding

Clinical interpretation

The 4AT developer describes its separate item coding at https://www.the4at.com/userguide. Original AMT-4 values below four warrant follow-up; four correct does not demonstrate intact memory, executive function or decision-making capacity.

Worked example

Three correct responses give raw AMT-4 = 3. They are not recorded as 1 merely because one response was wrong. Conversely, “AMT4 item = 1” on a 4AT form must not be pasted into this raw-total field.

Limitations and safety notes

This brief orientation screen does not diagnose delirium or dementia. An untestable assessment is not a raw zero. The 1997 validation was in older patients and is not a universal norm for every age or language.

Frequently asked questions

Can I convert the raw total into a full 4AT result?

No. The 4AT also assesses other domains. This page neither administers those domains nor computes a delirium result.

References

  • https://journals.sagepub.com/doi/pdf/10.1177/026921559701100308
  • https://www.the4at.com/userguide

Editorial review and citation methodology

Maintained by the Quick Medical Calculator Editorial Team. Content record date: September 9, 2026. A content date is not evidence of independent clinical review. Individual clinical sign-off is not recorded on this page.

  • Prefer original validation studies for scoring systems and prediction tools.
  • Use current specialty society guidance, transplant allocation policy, public health guidance, or regulator resources when they govern clinical use.
  • Include limitations and safety notes when a calculator is population-specific, context-dependent, or unsuitable as a standalone decision tool.

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