Clinical tool

G8 Geriatric Screening Before Cancer Treatment

Eight questions; a score of 14 or less means a full geriatric assessment is needed

Updated: 27 October 20261 min read2 references

Geriatric screening before cancer treatment (age 70 and over). A score of 14 or less means a full geriatric assessment is needed.

Food intake declined over the past 3 months
Weight loss during the past 3 months
Mobility
Neuropsychological problems
BMI
More than 3 medicines per day
How does the patient rate their health compared with people of the same age?
Age

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An aid for clinicians; it does not replace clinical judgement, local protocols or the drug label. Double-check every result before prescribing.

Use

In a few minutes, G8 identifies patients who benefit from a comprehensive geriatric assessment (function, falls, cognition, mood, nutrition, medicines and social support); the cut-off of 14 had a sensitivity of about 85% [1]. ASCO recommends geriatric assessment before chemotherapy in patients aged 65 and over [2].

References

2 references
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Numbers in the text, such as [1], refer to these sources. Sources with a “Study card” button are summarised in the site’s evidence library.

  1. 1
    Screening older cancer patients: first evaluation of the G-8 geriatric screening toolBellera CA, Rainfray M, Mathoulin-Pélissier S, et al · Ann Oncol · 2012;23:2166-2172
  2. 2
    Practical Assessment and Management of Vulnerabilities in Older Patients Receiving Chemotherapy: ASCO Guideline for Geriatric OncologyMohile SG, Dale W, Somerfield MR, et al · J Clin Oncol · 2018;36:2326-2347

This page is based on reputable scientific sources and was last updated on 27 October 2026. The content of this website is for educational and informational purposes only and does not replace consultation, diagnosis or treatment by a specialist physician. Consult your treating physician about any treatment decision.