Single Assessment Numeric Evaluation (SANE): How to Measure and Track Patient Recovery

Patient-reported outcome measures (PROMs) provide care teams with a structured lens into function from the patient’s perspective. While many validated tools, such as the DASH or KOOS, utilize multi-item questionnaires to dissect symptoms and activity limitations, the Single Assessment Numeric Evaluation (SANE) offers a streamlined alternative: one question, one score, and a clear snapshot of perceived recovery.

The SANE score asks patients to rate their affected body region as a percentage of "normal" on a scale of 0 to 100. This simplicity makes the tool exceptionally easy to integrate into high-volume clinical workflows, including intake, progress notes, and digital remote monitoring.

While brief, the SANE is a rigorous metric. Research consistently demonstrates a strong correlation between the SANE and lengthier, more burdensome PROMs, making it a reliable proxy when clinician or patient bandwidth is limited.¹

In this article, we break down what the SANE measures, how it is scored, when it is most useful in clinical practice, and how to interpret changes over time.

What is the Single Assessment Numeric Evaluation?

The SANE is a single-item PROM designed to capture global function. The patient is typically asked:

“How would you rate your affected joint or region today as a percentage of normal, where 0 percent is completely abnormal and 100 percent is normal?”

The score reflects a patient’s subjective perception of current function relative to their pre-injury state. A higher number indicates higher perceived function. Because the SANE captures overall perception, it is a global summary rather than a diagnostic tool; it does not explicitly isolate variables like strength, range of motion, or psychosocial factors.

Clinical nuance: perception vs. objective status

The SANE captures the patient experience in a way that isolated physical tests cannot. Consider a patient recovering from a rotator cuff repair who reports a SANE score of 55 percent at six weeks post-op, which then jumps to 78 percent by week twelve.

While this does not replace objective metrics like goniometry, it provides a vital “gut check” on self-efficacy and satisfaction, factors that are often more predictive of long-term success and medical necessity than degrees of motion alone.

Why the Single Assessment Numeric Evaluation score is vital for outcome tracking

In busy clinical environments, survey fatigue is a major barrier to data collection. The SANE score minimizes this burden, potentially increasing compliance rates for outcomes reporting, a factor increasingly tied to reimbursement models and quality-based incentives.

Key clinical use cases

• Baseline establishment: Establishes a quick patient-centered benchmark at the start of care.

• Progress monitoring: Identifies plateaus early, signaling a need to modify the plan of care.

• Goal setting: Facilitates shared decision-making by defining what “normal” looks like for the individual.

• Return-to-activity conversations: High SANE scores, often above 80 to 90 percent, are frequently used alongside physical testing to help inform return-to-sport or return-to-work decisions.

Correlation with established outcome measures

Evidence suggests the SANE score correlates well with more comprehensive patient-reported outcome measures across multiple musculoskeletal populations:

• Knee: Correlates moderately (approximately 0.60) with knee-specific PROMs across various conditions.¹

• Shoulder: Shows high correlation with the ASES (American Shoulder and Elbow Surgeons) score in rotator cuff populations.⁴

• Foot and ankle: Demonstrates validity against the revised Foot Function Index, particularly in forefoot and plantar fascia pathology.⁵

These findings support the SANE score as a practical patient-reported measure, particularly when used alongside objective testing and condition-specific outcome tools.

How to administer and score the Single Assessment Numeric Evaluation

Consistency is important for the SANE score to remain a useful longitudinal outcome measure. The patient provides a number from 0 to 100 that represents the current function of the affected region as a percentage of normal.

The patient is typically asked:

“How would you rate your affected joint or region today as a percentage of normal, where 0 percent is completely abnormal and 100 percent is normal?”

1. Identify the affected region

Be specific when identifying the body region, especially for patients with multiple painful areas or bilateral symptoms. A clear prompt supports more consistent scoring across visits.

Examples include:

• “How would you rate your right shoulder today?”

• “How would you rate your left knee today?”

2. Define the scale clearly

Reinforce that 100 percent reflects the patient’s perception of normal or pre-injury function, not simply improvement from the prior visit.

Some organizations allow patients to choose any number from 0 to 100, while others use 5- or 10-point increments. Using the same scoring method consistently across visits helps improve comparability over time.

3. Record the score in clinical context

The SANE score is most useful when documented alongside the date, body region, diagnosis or condition, and current phase of rehabilitation.

For example:

• Visit one: Right shoulder SANE score of 42/100

• Visit six: Right shoulder SANE score of 67/100

• Discharge: Right shoulder SANE score of 84/100

Tracking scores across the episode of care can help clinicians identify patterns in perceived recovery and support discussions around progression, goal attainment, and readiness for discharge.

4. Analyze trends over time

A single score can provide useful information, but trends across visits are often more clinically meaningful.

For shoulder conditions, research has reported a Minimal Clinically Important Difference (MCID) near 15 percentage points.⁸ A patient whose score improves from 40 to 70 may demonstrate meaningful perceived functional progress. Conversely, a patient whose score remains relatively unchanged across multiple visits may require reassessment of barriers, expectations, adherence, or progression strategies.

Example of SANE score use in practice

Consider a patient with anterior knee pain who reports difficulty with stairs, squatting, and recreational walking. During the initial evaluation, the patient is asked:

“How would you rate your left knee today as a percentage of normal, with 0 percent being completely abnormal and 100 percent being normal?”

The patient answers 50 percent.

Alongside the SANE score, the care team documents pain ratings, movement impairments, strength deficits, and activity limitations. After several weeks of rehabilitation, the patient reports decreased pain with stairs, improved walking tolerance, and greater confidence during daily activities. At reassessment, the patient reports a SANE score of 75 percent.

While this 25-point increase does not explain every aspect of recovery, it provides a meaningful, patient-centered snapshot of perceived progress. Clinically, this "perceptual gap" is often where the most valuable shared decision-making occurs:

• Objective vs. Subjective Asynchrony: In some cases, objective measures (like quadriceps strength) may improve faster than the patient’s perception of recovery.

• Identifying Residual Barriers: Conversely, a patient may report feeling significantly better despite lingering physical impairments.

The SANE score helps clinicians identify these discrepancies and guide targeted conversations. For example, if the score remains at 75% despite full range of motion, the patient may reveal that stair descent still feels unstable or that they remain hesitant to return to recreational hiking. These insights allow the clinician to pivot the plan of care toward neuromuscular control, patient education, or progressive loading to bridge the gap between clinical improvement and the patient’s “normal.”

Interpreting SANE scores and change over time

A SANE score should never be viewed in isolation. A score of 80 percent for a sedentary office worker may indicate readiness for discharge, while the same score for a collegiate athlete may suggest they are not yet prepared for the high-impact demands of their sport.

SANE scores must be interpreted within the specific clinical context. The meaning of a score fluctuates based on diagnosis, surgical status, activity demands, and individual patient goals. Because the score reflects patient perception, it is most valuable when paired with objective findings, performance testing, and other condition-specific outcome measures.

Clinically significant thresholds

Recent literature has begun to establish clinically meaningful benchmarks for the SANE score across several musculoskeletal populations.

• Shoulder arthroplasty: Research has shown that the SANE score is responsive in measuring clinically significant improvement after shoulder arthroplasty and may help identify substantial clinical benefit following surgery.^6,7

• ACL reconstruction: A 2024 study reported that the SANE score can reliably measure outcomes after ACL reconstruction while reducing survey burden during post-surgical rehabilitation.⁹

• General shoulder conditions: Prior research has reported good reliability and responsiveness in shoulder populations, with a Minimal Clinically Important Difference (MCID) near 15 percentage points in some study groups.⁸ For example, a change from 50 to 65 percent may represent a clinically meaningful improvement in perceived function.

Clinical example: A change from 50 percent to 65 percent likely represents a clinically meaningful improvement in perceived function for the patient, even if objective strength measures are still lagging.

While these findings are promising, clinically meaningful thresholds vary by population, diagnosis, and methodology. Clinicians should avoid treating a single cutoff value as a universal pass/fail metric, instead using it to inform the broader narrative of the patient’s recovery.

Limitations and clinical considerations

While the Single Assessment Numeric Evaluation is a highly efficient tool, it possesses inherent limitations that require clinical discernment. Because the SANE relies on a single global question, it does not isolate the specific symptoms, impairments, or activities driving the score.

A patient may report a low score due to a variety of distinct factors, such as:

• Pain or localized discomfort

• Weakness or perceived instability

• Fear of movement (kinesiophobia)

• Limited endurance

• Reduced confidence in the joint

• Difficulty with a specific high-level task

The score itself does not distinguish between these contributing factors. Furthermore, SANE scores are heavily influenced by individual expectations and activity demands. For example, a sedentary patient may view an 80 percent score as a successful outcome because they can complete daily activities comfortably. Conversely, a competitive athlete may view that same 80 percent as a failure because it represents a lingering inability to return to peak performance.

This variability is precisely what makes patient-reported outcomes valuable, but it also necessitates that the SANE score serves as a conversation starter rather than a standalone decision-making tool.

Integrating SANE into the clinical decision-making process

The Single Assessment Numeric Evaluation provides clinicians with a simple and efficient way to measure perceived function from the patient’s perspective. Its 0 to 100 scale is easy to understand, quick to administer, and practical for repeated use throughout an episode of care.

Research supports the reliability, validity, and responsiveness of the SANE score across several musculoskeletal populations, particularly in shoulder care, with growing use in knee, foot and ankle, and sports medicine settings. When combined with objective findings and clinical reasoning, the SANE score supports more informed conversations regarding:

• Progress tracking: Visualizing the trajectory of recovery beyond physical impairments.

• Recovery expectations: Aligning the patient's perceived status with the typical healing timeline.

• Functional goals: Identifying when a patient feels “ready” for higher-level activities.

• Readiness for care transitions: Supporting the jump from one phase of rehab to the next (e.g., from protective to loading phases).

By incorporating the SANE score into the clinical workflow, providers can bridge the gap between objective clinical data and the patient's lived experience, ensuring a more comprehensive approach to outcomes-based care.

References

1. Nazari, G., MacDermid, J. C., Bobos, P., & Furtado, R. (2020). Psychometric properties of the Single Assessment Numeric Evaluation (SANE) in patients with shoulder conditions: A systematic review. Physiotherapy, 109, 33–42. https://pubmed.ncbi.nlm.nih.gov/32858378/

2. Hawkins, R. J., Boes, N., Thigpen, C. A., Shanley, E., Pill, S. G., & Kissenberth, M. J. (2024). Measure what matters: Single Assessment Numeric Evaluation (SANE) score as the critical measure for shoulder outcomes. Journal of Shoulder and Elbow Surgery, 33(6), 1397–1403. https://pubmed.ncbi.nlm.nih.gov/38295936/

3. O'Connor, C. M., & Ring, D. (2019). Correlation of Single Assessment Numeric Evaluation (SANE) with other patient reported outcome measures (PROMs). Archives of Bone and Joint Surgery, 7(4), 303–306. https://pubmed.ncbi.nlm.nih.gov/31448305/

4. Retzky, J. S., Baker, M., Hannan, C. V., & Srikumaran, U. (2020). Single Assessment Numeric Evaluation scores correlate positively with American Shoulder and Elbow Surgeons scores postoperatively in patients undergoing rotator cuff repair. Journal of Shoulder and Elbow Surgery, 29(1), 146–149. https://pubmed.ncbi.nlm.nih.gov/31401127/

5. Bellas, N., Cirino, C., Cote, M. P., Sathe, V., & Geaney, L. (2019). Validation of the Single Assessment Numeric Evaluation (SANE) score as an outcome measure by comparison to the Revised Foot Function Index (rFFI). Foot & Ankle Orthopaedics, 4(3), 2473011419868953. https://pmc.ncbi.nlm.nih.gov/articles/PMC8696912/

6. Gowd, A. K., Charles, M. D., Liu, J. N., Lalehzarian, S. P., Cabarcas, B. C., Manderle, B. J., Nicholson, G. P., Romeo, A. A., & Verma, N. N. (2019). Single Assessment Numeric Evaluation (SANE) is a reliable metric to measure clinically significant improvements following shoulder arthroplasty. Journal of Shoulder and Elbow Surgery, 28(11), 2238–2246. https://pubmed.ncbi.nlm.nih.gov/31307894/

7. Cohn, M. R., Kunze, K. N., Polce, E. M., Nemsick, M., Garrigues, G. E., Forsythe, B., Nicholson, G. P., Cole, B. J., & Verma, N. N. (2021). Establishing clinically significant outcome thresholds for the Single Assessment Numeric Evaluation 2 years following total shoulder arthroplasty. Journal of Shoulder and Elbow Surgery, 30(4), e137–e146. https://pubmed.ncbi.nlm.nih.gov/32711106/