Sway Sports Concussion Test Reports

Quick Highlights

Force Platform Comparison

Sway Balance as sensitive as traditional force platform.

Sway Balance has been shown to provide more accurate scores than those collected with force platform technology, the current market gold standard in postural sway assessment. Sway provided more accuracy in differentiating between balance conditions and showed within-subject significant differences between foam and no-foam conditions in stable (two foot) and less stable (single foot) conditions. The force platform did not show significance between the same conditions.


Strong test-retest reliability found with Sway Balance System.

Accuracy and consistency are both critical to the value of the Sway Balance™ System. Reliability was shown in clinical studies analyzing test-retest variability of the Sway System in independent research studies of 30, 57 and 75 subjects and has been shown previously in the literature using accelerometer measurements. These results demonstrated strong test-retest reliability with no significant difference following significantly lower scores in an initial trial, suggesting a single familiarization test may be necessary to establish a consistent baseline and remove the learning effect.


Established as a valid software for objective balance testing.

Sway Balance validity was established through the evaluation of the software in progressively more difficult balance conditions as well as during balance testing on foam pads of varying density. Results were consistent with the hypothesis that the more unstable the assessment the lower the balance score compared to more stable conditions. For each measure, as the balance task became progressively more difficult, the Sway Balance System recorded a significant (p > 0.003) decrease in the balance score. Significant differences in balance scores on foam pads of varying densities were also found, with the thicker/less dense pads relating to lower stability scores and the more dense foam pads showing high stability.

BESS Comparison

Strong test-retest reliability found with Sway Balance System.

The Sway Balance assessment has shown strong agreement (r > 0.83) with the Balance Error Scoring System (BESS) in determining an individual’s level of balance. The BESS test has been shown to correlate with force-platform technology as an effective means of testing balance to determine potential head injuries. The objective nature of a standardized Sway protocol provides a more comparable score, without the inherent bias of the test administrator and the low inter-rater reliability seen through interclass coefficient (ICC) scores typically associated with BESS. Sway is an effective sideline tool due to its objective metrics, simple user interface and the time it takes to complete a test.

Sway Concussion BESS Comparison

FDA Clearance

Sway Balance is classified as a medical device.

The Sway Balance System is intended for use to assess sway as an indicator of balance. Individual suitability for assessment must be judged on a case by case basis, by a qualified individual including those certified and/or licensed in their state to prescribe and/or use balance devices such as certified athletic trainers and coaches, physical therapists, nurses and physicians.

The Sway Balance System is a medical device and should only be administered with a full understanding of the testing procedure. It is contraindicated for the Sway Balance to be used in any setting without the proper understanding of testing procedures. Testing should be performed in a controlled environment to ensure test repeatability. Testing in an improper environment may lead to inaccurate results.

Sway concussion test contraindications



Recommended coding structure.

Balance assessments are physical performance tests that provide important information on neuromuscular and vestibular function or to validate patient progress. To properly code for a balance assessment, a physical performance code should be used on the 1500 form with the appropriate modifier, code pairing and documentation with a Sway Medical Report. Based on independent third party review, Sway Medical recommends using the following coding structure for Physicians, Physical and Occupational Therapists and Neuropsychologists.

Physical & Occupational Therapist

CPT Code 97750 – Physical Performance Test
Modifiers GP (Physical Therapy Modifier)
52 (Reduced Services for less than 8 min)
Reimbursement $32.34 National Average
Code Pairing 97110 Therapeutic exercise
97112 Neuromuscular Re-education
Notes Cannot be billed with:
Evaluation or Re-evaluation (97001 - 97004)


Performing a Sway Balance assessment in a Neuropsychology setting does not typically include additional physical performance codes. Sway recommends that Neuropsychologists include the Sway Balance technology into the standard neurobehavioral exam with CPT codes 96116 or 96118. The value of Sway to the Neuropsychologist is a reduction in the time it takes to perform a physical performance tests as a part of the neurobehavioral exam. Sway provides an easier and more objective tool to reduce the amount of time spent on testing balance.