In a 78-year-old woman with hypertension, hyperlipidemia, recent falls at home, and visual changes, which factor—mental status changes, prior fall history, visual impairment, or functional mobility—poses the greatest risk for falls during hospitalization?

Hospital Fall Risk Assessment in a 78-Year-Old Woman

Prior fall history poses the greatest risk for falls during hospitalization in this patient. 1

Evidence-Based Risk Factor Hierarchy

The USPSTF systematic review establishes a clear hierarchy for hospital fall-risk screening based on validation across multiple studies:

First-Line Risk Factor: Prior Fall History

• History of previous falls is the most validated and widely applied screening criterion, having been employed in all 16 USPSTF-reviewed studies of hospitalized patients at high risk for future falls. 1
• This patient's reported increase in falls at home makes prior fall history the dominant risk factor. 1
• A previous fall carries an odds ratio of 2.42 (95% CI: 1.49-3.93) for predicting subsequent falls within one year. 2

Second-Line Risk Factor: Mental Status Changes

• Altered or impaired cognition shows strong statistical association with falls in multivariate analyses, ranking second in the evidence hierarchy. 1
• This patient's tunnel vision and clamminess suggest possible orthostatic hypotension, which may affect mental status during episodes. 3

Third-Line Risk Factor: Functional Mobility

• Impaired physical function or mobility limitations rank as the second most common risk factor used across USPSTF studies but carry risk comparable to mental impairment. 1
• Mobility impairment (balance, leg strength, gait) carries an odds ratio of 2.64 (95% CI: 1.64-4.26) for falls. 2
• For recurrent falls specifically, mobility impairment shows an even stronger association (OR = 5.0). 4

Fourth-Line Risk Factor: Visual Impairment

• Visual impairment is incorporated less often in fall-risk stratification algorithms compared with prior fall history and mobility limitations, indicating weaker consensus for routine use. 1
• While this patient is farsighted and uses reading glasses, visual impairment alone shows less consistent validation as a primary screening tool. 1
• Impaired depth perception and contrast sensitivity are stronger visual risk factors than simple visual acuity deficits. 5

Additive Risk Profile

• Fall risk is additive; patients with multiple risk factors have substantially higher odds of falling than those with a single factor. 1
• This patient presents with at least three risk factors: prior falls, possible orthostatic symptoms (tunnel vision/clamminess), and visual impairment. 1
• The combination of prior falls, balance difficulty/dizziness, and mobility impairment stratifies patients into groups with fall risk ranging from 10% to 51% over one year. 2

Clinical Pitfalls to Avoid

• Do not prioritize visual impairment over fall history in initial risk stratification, as the evidence base is weaker. 1
• Do not assess risk factors in isolation; the most effective fall-prevention interventions target patients identified by a combination of prior falls, mobility difficulty, and healthcare utilization. 1
• Do not overlook orthostatic hypotension as a contributor to both mental status changes and functional mobility impairment; this patient's tunnel vision and clamminess warrant blood pressure assessment. 3

Answer to the Question

B. Fall history represents the highest risk factor for this hospitalized patient, as it is the most validated screening criterion across all evidence-based guidelines and carries the strongest predictive value for future falls. 12