Medicine
Comprehensive Geriatric Assessment in Oncologic Surgical Planning for Older Adults
Quick fact
In older adults undergoing cancer surgery, comprehensive geriatric assessment–based risk predictions identify postoperative complications and mortality far better than chronological age alone, with some studies showing a 4-fold increase in complication risk for frail patients compared to non-frail patients.
Why this is interesting
We assume that an 80-year-old and a 60-year-old tolerate surgery differently, but how do we know which one is truly at higher risk?
Read the full explanation
Understanding Comprehensive Geriatric Assessment in Oncologic Surgical Planning for Older Adults
Think of an older adult as a complex system. Chronological age only tells you how many years have passed, but it doesn't tell you how that system functions. Comprehensive geriatric assessment (CGA) is a holistic screen that evaluates multiple 'subsystems': how well the person moves (functional status), how well they remember and think (cognition), what other health conditions they carry (comorbidities), which medications they take (polypharmacy), and their mood, nutrition, and social support. The process works through a structured questionnaire and physical tests, often involving a team of nurses, pharmacists, therapists, and physicians. The result is a profile of the person's 'physiologic reserve'—their ability to withstand the stress of surgery. A CGA can be performed in a clinic, at the bedside, or even over the phone. It takes about 15–30 minutes using validated tools like the G8 or VES-13 screening, followed by full assessments when deficits are found. The output is not a single number but a map of vulnerabilities that can be addressed preoperatively.
A deeper explanation
The mechanism behind CGA is that it captures multiple domains that contribute to surgical stress tolerance, rather than relying on a single predictor like ejection fraction or creatinine clearance. Each domain—functional, cognitive, nutritional, pharmacological—represents a dimension of homeostasis that surgery disrupts. For example, poor handgrip strength, a component of functional assessment, reflects skeletal muscle mass and predicts postoperative mortality. Cognitive impairment, measured by the Mini-Mental State Examination, increases the risk of delirium because the brain's compensatory mechanisms are already compromised. Polypharmacy (five or more medications) is associated with drug interactions, adverse effects, and a higher likelihood of falls and bleeding complications. By combining these domains, CGA captures frailty—a syndrome of decreased physiologic reserve. Frailty is an independent predictor of postoperative complications, length of stay, and discharge to a higher level of care. The value of CGA in surgical planning is that it shifts the focus from 'how old is the patient?' to 'what are their specific vulnerabilities and can we optimize them?' Preoperative CGA can identify modifiable factors—such as malnutrition, anemia, or uncontrolled heart failure—that can be treated to reduce perioperative risk. It also supports shared decision-making by providing realistic outcome data tailored to the patient's functional age. CGA is not a prediction model but a decision-support system that integrates numerical risk with patient-centered priorities.