Trunk Control Test

Abstract

The Trunk Control Test (TCT) is a widely utilized clinical tool designed to specifically evaluate trunk stability and motor function in patients who have suffered a stroke (Cerebrovascular Accident or CVA). Developed to assess critical aspects of postural control necessary for functional recovery, the TCT consists of four distinct observational items assessing mobility and static balance.

The test is scored using an ordinal scale with three points per item, where a maximum total score of 100 indicates superior functional performance and excellent control of the trunk musculature. The TCT is valued in rehabilitation settings for its simplicity and strong predictive validity regarding long-term mobility outcomes.

Keywords

Trunk Control Test, TCT, Stroke, CVA, Trunk stability, Mobility, Observational scale, Postural control, Physical assessment.

Authors

Collin C, Wade D (1990), KNGF-richtlijn Beroerte (Dutch version, 2004).

Purpose

The primary purpose of the TCT is to provide a rapid, objective assessment of a patient’s ability to control and stabilize the trunk immediately following a Cerebrovascular Accident. This assessment is critical for predicting recovery trajectories and planning appropriate physiotherapy interventions, particularly those related to regaining bed mobility and establishing independent sitting balance.

By focusing exclusively on axial control, the scale measures fundamental aspects of motor recovery, helping clinicians distinguish between patients who have retained or recovered basic motor functions necessary for safe and independent functional transfers and activities of daily living (ADLs).

Construct

The underlying construct measured by the TCT is Trunk Stability, which encompasses both static balance and dynamic control of the trunk muscles. This construct is operationally defined through four key movements: dynamic rolling ability (both toward the weaker and stronger side), the ability to move from supine to sitting, and the ability to maintain static balance while seated without support.

Impairment in trunk stability is highly correlated with overall functional disability post-CVA. The TCT effectively captures the relationship between central nervous system damage and the resulting deficit in axial muscle control, which underpins all limb movements and postural adjustments.

Validity

The Trunk Control Test has demonstrated strong concurrent validity when compared with other established measures of functional independence and mobility post-CVA, such as the Barthel Index. Research indicates that TCT scores shortly after a stroke are powerful predictors of the patient’s ability to walk independently months later, highlighting its strong predictive validity regarding long-term functional outcomes.

The scale’s content validity is high, as the four items directly reflect essential functional movements required for bed mobility and sitting. Its simple, standardized structure contributes significantly to its clinical utility, ensuring that the measured construct (trunk control) is relevant and accurately assessed in the clinical setting.

Reliability

The Trunk Control Test exhibits high levels of both inter-rater and intra-rater reliability, a crucial feature for any clinical observation tool. Studies support the consistency of scoring across different clinicians and over repeated applications by the same clinician, provided the standardized administration protocol is strictly followed.

This robust reliability ensures that changes observed in patient scores accurately reflect genuine changes in the patient’s functional status and recovery trajectory following a stroke, rather than being attributable to measurement inconsistency or subjective interpretation.

Factor Analysis

While the TCT is conceptually designed as a unidimensional measure of overall trunk control, formal factor analyses often confirm a strong single factor structure. This suggests that the four items consistently load onto one primary construct, supporting the scale’s use as a holistic, rather than multi-faceted, measure of axial motor function post-CVA.

The strong primary factor extracted typically accounts for a significant proportion of the variance in patient performance, confirming that the scale is highly focused on measuring the integrity of the patient’s core postural control system.

Instrument

Test Type: Observational/Performance-based assessment

Format: Ordinal 3-point scoring scale (0, 12, or 25 points per item), totaling 100 points maximum.

Language Available: English (Original), Dutch (KNGF Version), and internationally utilized translations.

Population Group: Clinical population diagnosed with Stroke (CVA) or other neurological conditions affecting trunk stability.

Age Group: Adults and Elderly (Volwassenen and Ouderen).

Population Details: Patients undergoing acute or subacute rehabilitation following a Cerebrovascular Accident.

Test Methodology: Direct observation of patient performance across four standardized movements. The scale is administered by a trained healthcare professional, typically a physiotherapist or occupational therapist.

Keywords

Rehabilitation, Postural control, Bed mobility, Functional assessment, Collin and Wade, Ordinal scale.

Authors

Author ORCID Identifier: N/A (Information not available in source)

Affiliation Email addresses: N/A (Information not available in source)

Correspondence Address: N/A (Refer to original publications by Collin C & Wade D, 1990)

Permissions & Fee and Test Year

The original publication year for the Trunk Control Test is 1990 (Collin C, Wade D). The Dutch adaptation was formalized in 2004 by the KNGF. The TCT is generally considered a non-proprietary clinical tool available for use in clinical and research settings without specific licensing fees, though proper citation of the original authors is required.

The original explanatory notes (Toelichtingsformulier) for this version can be downloaded here: TCT Explanatory Form (PDF).

The original measurement instrument (Meetinstrument) document can be downloaded here: TCT Measurement Instrument (PDF).

Reference’s

Collin, C., & Wade, D. T. (1990). The Trunk Control Test as a measure of disability in stroke patients. Physiotherapy, 76(9), 517-521.

KNGF-richtlijn Beroerte (2004). Koninklijk Nederlands Genootschap voor Fysiotherapie.

Items of the Trunk Control Test

IMPORTANT: The following scale items must be preserved in their original language and must not be changed in any way.

1. omrollen naar zwakkere zijde;
2. omrollen naar sterkere zijde;
3. opkomen tot zit vanuit rugligging;
4. balans in zittende positie gedurende 30 seconden.