The G8 (Geriatric 8) health status screening tool.
The G-8 screening tool was developed to identify elderly cancer patients who would benefit from comprehensive geriatric assessment (CGA). The G-8 showed good screening properties for identifyng elderly patients who could benefit from CGA. 
Research authors: C.A. Bellera, M. Rainfray, S. Mathoulin-Pélissier, C. Mertens, F. Delva, M. Fonck, P.L. Soubeyran
Details Formula Study characteristics Files & References
Model author
Model ID
Revision date
MeSH terms
  • Elderly
  • Frail Elderly
  • Geriatrics
  • Model type
    Linear model (Calculation)
    No Formula defined yet
    Condition Formula

    Additional information

    Analyses were based on 364 cancer patients aged >70 years scheduled to receive first-line chemotherapy included in a multicenter prospective study. The G-8 consists of seven items from the Mini Nutritional Assessment (MNA) questionnaire and age.

    Study Population

    Total population size: 364
    Males: {{ model.numberOfMales }}
    Females: {{ model.numberOfFemales }}

    Categorical characteristics

    Name Subset / Group Nr. of patients
    Age <80 247
    80-85 89
    >85 28
    ECOG performance status 0-1 261
    2-4 83
    Cancer site Non-Hodgkin's lymphoma 110
    Colon 101
    Stomach 37
    Lung 37
    Pancreas 23
    Prostate 20
    Bladder 18
    Ovary 14
    Unknown primary 4
    Disease stage - solid tumors M0 62
    M1 134
    MX 58
    Disease stage - non-Hodgkin's lymphoma aaIPI 0-1 59
    aaIPI 2-3 51
    The G8 (Geriatric 8) health status screening tool.
    Refer to Intended Use for instructions before use
    Evidencio B.V., Irenesingel 19, 7481 GJ, Haaksbergen, the Netherlands

    The G-8 score contains:

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    The G-8 score contains: Points

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    Outcome stratification

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    Result interpretation

    The G-8 Score is a screening tool containing 8 questions. The total G-8 score lies between 0 and 17. A higher score indicates a better health status.

    It should be noted that the G-8 tool is not aimed at replacing expertise of geriatricians for the diagnosis of frailty. Rather, it should be used as a screening tool to identify patients in need for a further assessment and appropriate care. 

    A threshold is suggested at 14 points, meaning that a patient with a score of 14 or lower should undergo full geriatric evaluation. 


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    Calculations alone should never dictate patient care, and are no substitute for professional judgement. See our full disclaimer.

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