Clinical assessment of ankle plantarflexor spasticity in adult patients after stroke: Inter-and intra-rater reliability of the Modified Tardieu Scale

Primary objective: To evaluate the reliability of the Modified Tardieu Scale (MTS) in the measurement of ankle plantarflexor spasticity in patients after stroke. Research design: Inter- and intra-rater reliability study. Interventions: Not applicable. Methods and procedures: Adult patients after stroke participated. Patients were tested by two raters for inter-rater reliability. Patients were re-tested by one rater at least 1 week later for intra-rater reliability. The plantarflexors on the hemiparetic side were tested. Main outcomes and results: The ICCs of inter and intra-rater reliability across all components of MTS were moderate and moderately high (range 0.40-0.71). Inter- and intra-rater reliability for the dynamic component of spasticity (R2-R1) were moderate (ICC = 0.57 and 0.40, respectively). The difference between the two raters for R2 was statistically significant (p = 0.001). Conclusions: The reliability of the Modified Tardieu Scale in the measurement of ankle plantarflexor spasticity in adult patients after stroke was insufficient for routine use in clinical settings and research.