brand logo

Am Fam Physician. 2020;102(12):753-755

Related article: Frailty: Evaluation and Management

Related letter: All Patients Undergoing Any Surgical Procedure Should Be Assessed for Frailty

This clinical content conforms to AAFP criteria for CME.

Author disclosure: No relevant financial affiliations.

Case Scenario

Mr. M is an 80-year-old widower who lives in an assisted living facility. He has mild congestive heart failure and right knee osteoarthritis. Despite treatment with acetaminophen and a steroid injection from his primary care physician, increasing pain in his arthritic knee limits his ability to participate in yoga classes and walk for physical activity. He is not overweight and uses a walker for stability. He eats, toilets, and tends to his hygiene independently. During his appointment, he asks about knee replacement surgery. He mentions that his appetite is reduced, and he has lost 10 pounds since his last visit six months ago. His son, who accompanies him to the visit, says he has noticed his father has become more forgetful in the past three months.

Clinical Commentary

Knee replacement surgery is considered a moderate-stress procedure according to the Operative Stress Score.1 However, research suggests that the patient's preoperative health and function are more important considerations in estimating operative risk.1 Table 1 lists key components of the preoperative evaluation. Frailty is a term that describes patients, regardless of age, who have reduced physiologic reserve and are at increased risk of dying within five years. Patients who are frail and very frail who underwent lowest stress surgical procedures exceeded the 30-day mortality rate often used to define high-risk surgery.1 [corrected]

Cognitive status
Patient's life goals
PHQ-2 and PHQ-9, if indicated
Risk Analysis Index
Social and living situation

Frailty can be measured using the revised Risk Analysis Index, a validated tool with high predictive power for postoperative mortality.2 The tool takes less than two minutes to complete, using 14 variables including demographic factors (age, sex), comorbidities (presence of disseminated cancer, unintentional weight loss, renal failure, congestive heart failure, loss of appetite, dyspnea at rest, cognitive decline), facility residence, and level of independence in four activities of daily living. A Risk Analysis Index score of 30 or more out of a possible 81 points indicates frailty, and 40 points or more indicates the patient is very frail.3,4 All surgical procedures are considered high risk for patients who are frail and very frail.1

One of the Risk Analysis Index questions is, “Have your cognitive skills or status deteriorated over the past three months?” Minor and major surgeries can trigger a significant reduction in functional status for older people who are frail, especially people with cognitive impairment. The Risk Analysis Index is only modestly sensitive for mild cognitive impairment or dementia; therefore, clinicians who have a high index of suspicion should use a screening tool for dementia such as the Mini-Cog ( Patients with dementia who are hospitalized are at high risk of iatrogenic harms, including delirium, long-term cognitive and functional decline, longer hospital stays, and greater risk of institutionalization.5,6 The combination of physical frailty and mild cognitive impairment is associated with a higher risk of adverse outcomes than either factor alone.7

Preoperative evaluation for depression using the Patient Health Questionnaire-2 (PHQ-2) and PHQ-9, if indicated, may identify additional risks of surgery, including increased risk of postoperative infection, chronic pain, and delirium.8

Adequate evaluation of the patient's living situation is important to assess the need for skilled nursing or rehabilitation placement or to plan a safe discharge home. Will someone be with the patient during surgical recovery? How will meals be provided? Are stairs an issue? How will bathing and toileting be accomplished? How will prescriptions be filled? Do the patient and caregiver know how to get questions answered? If durable medical equipment, such as a portable toilet or a hospital bed, will be needed, who will arrange for that ahead of time? Are there fall risks at home? Would a preoperative home visit by a nurse or physical therapist be helpful? Preplanning can facilitate safe return to the home and avoid prolonged hospital stays or temporary placement in a skilled nursing facility.

Few preoperative risk reduction interventions have been tested in surgical patients who are frail. However, pre- and postoperative exercise therapy appears to improve functional outcomes and quality of life after hip replacement or cardiac surgery.9 Preoperative evaluation of older patients can also enable a clinician to more accurately inform the patient and family about expected favorable or unfavorable outcomes of surgery and the alternatives to surgery. For example, when discussing joint replacement surgery, alternatives could include physical therapy, working on pain management, additional durable medical equipment, and alternate modes of physical activity. This sets the stage for shared decision-making.10 Identifying the patient's life goals will inform consideration of options, including avoiding surgery altogether (Table 2). Patients and their caregivers should be advised of the increased risk that even low-stress surgical procedures can pose for mild cognitive impairment, dementia, or overall frailty that would decrease independence and present a risk of institutionalization. In general, patients value their quality of life as much as survival.11

Already a member/subscriber?  Log In


From $145
  • Immediate, unlimited access to all AFP content
  • More than 130 CME credits/year
  • AAFP app access
  • Print delivery available

Issue Access

  • Immediate, unlimited access to this issue's content
  • CME credits
  • AAFP app access
  • Print delivery available

Article Only

  • Immediate, unlimited access to just this article
  • CME credits
  • AAFP app access
  • Print delivery available
Purchase Access:  Learn More

Lown Institute Right Care Alliance is a grassroots coalition of clinicians, patients, and community members organizing to make health care institutions accountable to communities and to put patients, not profits, at the heart of health care.

This series is coordinated by Kenny Lin, MD, MPH, deputy editor.

A collection of Lown Right Care published in AFP is available at

Continue Reading

More in AFP

More in Pubmed

Copyright © 2020 by the American Academy of Family Physicians.

This content is owned by the AAFP. A person viewing it online may make one printout of the material and may use that printout only for his or her personal, non-commercial reference. This material may not otherwise be downloaded, copied, printed, stored, transmitted or reproduced in any medium, whether now known or later invented, except as authorized in writing by the AAFP.  See permissions for copyright questions and/or permission requests.