G8 Geriatric Assessment Calculator

By Dr. Costa / October 19, 2025

Screen for frailty and identify patients who may benefit from comprehensive geriatric assessment

Assessment Questions

Please answer all questions based on patient information:

1. Has food intake declined over the past 3 months due to loss of appetite, digestive problems, chewing or swallowing difficulties?

Severe loss of appetite

Moderate loss of appetite

No loss of appetite

2. Weight loss during the last 3 months?

Weight loss > 3 kg (6.6 lbs)

Does not know

Weight loss between 1 and 3 kg (2.2-6.6 lbs)

No weight loss

3. Mobility?

Bed or chair bound

Able to get out of bed/chair but does not go out

Goes out

4. Neuropsychological problems?

Severe dementia or depression

Mild dementia

No psychological problems

5. Body Mass Index (BMI)?

BMI < 19

BMI 19 to < 21

BMI 21 to < 23

BMI ≥ 23

6. Takes more than 3 prescription drugs per day?

Yes

7. In comparison with other people of the same age, how does the patient consider his/her health status?

Not as good

Does not know

As good

Better

8. Age

> 85 years

80-85 years

< 80 years

G8 Score: 0/17

About the G8 Assessment

What is the G8 Tool?

The G8 is a simple, rapid screening questionnaire used in geriatric medicine to identify older patients (typically 70+) who are at risk for frailty and might benefit from a comprehensive geriatric assessment.

Scoring Interpretation

Score > 14: Normal screening result. Patient is likely fit or robust.
Score ≤ 14: Abnormal screening result. Indicates high likelihood of frailty. Refer for Comprehensive Geriatric Assessment (CGA).

Clinical Applications

Identifying frailty in older adults
Onco-geriatrics (predicting chemotherapy tolerance)
Pre-operative assessment
Allocation of geriatric resources

Key Features

Quick to administer (about 5 minutes)
High sensitivity for detecting frailty
Validated in multiple clinical settings
Prognostic value for treatment outcomes

Note: This tool is for educational and informational purposes only. Always consult with healthcare professionals for medical decisions.

Author

Dr. Costa
Specialty Doctor, NHS, UK

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