The Importance of the Five-Times Sit-to-Stand Test in Older Adults

Falls are a leading cause of injury, hospitalisation and functional decline in older adults — particularly in residential aged care settings where mobility limitations and frailty are common. In an Australian cohort of adults aged ≥65 years living in RACFs, nearly 60 % of residents experienced at least one fall annually, with many resulting in injury or hospitalisation.

Identifying those at highest fall risk is critical, and objective physical performance tests play a central role. One test that has gained considerable research support is the Five-

Times Sit-to-Stand Test (5TSTS) — a simple measure of lower-limb strength, balance and functional mobility.

Why Sit-to-Stand Matters

The 5TSTS requires a person to rise from a seated position and sit back down five times as rapidly as safely possible. It captures key components of mobility: leg muscle strength, balance control and transitional movements — all of which are intimately tied to falls risk and independence in daily activities.

Research supports the predictive value of this test:

• A large longitudinal study found that inability to complete the test was strongly associated with future disability, and slower times were linked with an elevated risk of falls and functional decline over three years.

• Poorer 5TSTS performance distinguishes people with a history of falls and is associated with fear of falling — an important psychosocial factor linked to recurrent falls.

• In residential aged care populations, sit-to-stand impairments correlate significantly with fall rates, alongside gait speed and balance deficits.

These findings suggest that the 5TSTS is not just a functional test, but a practical indicator of fall risk and early functional decline, ideally suited to aged care environments where quick, reliable measures are needed.

General reference values:

• 60–69 years: ~11.4 seconds
• 70–79 years: ~12.6 seconds
• 80–89 years: ~14.8 seconds

(These values were derived from research compiling norms across multiple older adult cohorts and are commonly cited in clinical practice.)

Interpretation / high falls-risk thresholds:

• ≥ 12 seconds: indicates need for further fall-risk assessment in older adults.
• ≥ 15 seconds: often used as a marker of high risk for falls and reduced lower-limb strength/function.
  (Thresholds like ≥15 s has been used in mobility and balance research to identify older adults at elevated fall risk based on association with recurrent falls.)
• Some fall-screening sources also note ≈13.6 seconds or more as suggesting an increased risk of mobility disability (often used in public health fall screening tools).

DEMMI: A Broader Mobility Measure — But Is It Enough for Falls?

The De Morton Mobility Index (DEMMI) is a 15-item performance test designed to measure mobility across the spectrum — from bed mobility and transfers to gait and dynamic balance. It has been validated extensively in older adults, demonstrating excellent reliability and validity without significant floor or ceiling effects, and is used across clinical settings from hospital to community and aged care.

However, while DEMMI is widely accepted to monitor mobility change, evidence that DEMMI specifically predicts falls — particularly in RACFs — is limited. Most validation studies focus on DEMMI’s psychometric qualities (e.g., reliability, responsiveness) rather than direct predictive associations with falls. Current research in hospitalized geriatric populations shows that lower DEMMI scores predict adverse health outcomes such as readmission and mortality, but falls per se are not the primary reported outcome in these studies.

In contrast, studies evaluating 5TSTS more directly assess associations with falls themselves. This suggests a potential gap if DEMMI is used alone as an outcome measure in aged care without accompanying fall-specific functional assessments.

DEMMI vs 5TSTS: Which Better Predicts Falls and Decline?

Measure	Focus	Research Support as Predictor of Falls
5TSTS	Lower-limb strength & transitional mobility	Moderate to good evidence linking slower times with falls & functional decline in older adults
DEMMI	Broad mobility & functional abilities	Strong evidence for mobility measurement and responsiveness; limited direct research on predicting falls specifically

The 5TSTS tends to target components directly implicated in fall mechanics (transitioning, strength, balance), and its times have shown associations with fall history and risk. DEMMI, while comprehensive, captures a wider mobility construct that may not isolate fall-specific predictors as clearly.

But should DEMMI remain the key functional measure?

Given that DEMMI does not explicitly focus on lower-limb strength and sit-to-stand performance — a key factor in fall risk — there’s reason to ask whether it should be supplemented with or complemented by specific performance tests like the 5TSTS to better anticipate falls and functional decline.

Rethinking Functional Monitoring in Aged Care

Both the 5TSTS and DEMMI have their place in assessing older adults:

• 5TSTS is a quick, valid, fall-relevant assessment that can help identify individuals at higher risk of future falls and functional deterioration.
• DEMMI offers a broader, responsive measure of mobility that is useful for tracking overall functional change.

However, when it comes to predicting falls in RACFs, relying on DEMMI alone may not be optimal. Integrating the 5TSTS alongside DEMMI and other targeted measures could improve early detection of decline and better align functional monitoring with fall prevention goals — a key component of quality aged care provision.