A 3meter Timed Tandem Walk is an early marker of motor and cerebellar impairment in fully ambulatory MS patients
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A 3meter Timed Tandem Walk is an early marker of motor and cerebellar impairment in fully ambulatory MS patients. / Stellmann, J P; Vettorazzi, E; Poettgen, J; Heesen, C.
In: J NEUROL SCI, Vol. 346, No. 1-2, 2014, p. 99-106.Research output: SCORING: Contribution to journal › SCORING: Journal article › Research › peer-review
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TY - JOUR
T1 - A 3meter Timed Tandem Walk is an early marker of motor and cerebellar impairment in fully ambulatory MS patients
AU - Stellmann, J P
AU - Vettorazzi, E
AU - Poettgen, J
AU - Heesen, C
N1 - Copyright © 2014 Elsevier B.V. All rights reserved.
PY - 2014
Y1 - 2014
N2 - BACKGROUND: Mobility assessment in Multiple Sclerosis (MS) is crucial for trials and individual patient counseling. Up to now, standard tests as the Timed 25-Foot Walk (T25FW) are restricted by floor effects in mildly disabled patients. The 3-meter Timed Tandem Walk (TTW) as a possibly more sensitive measure has not been investigated yet.OBJECTIVE: To investigate sensitivity and specificity of the TTW and T25FW to detect mild clinical impairment in a large cohort of MS patients.METHODS: We extracted T25FW, TTW and EDSS from our UMC patient database (2009-2012). After randomization into an explorative (n = 497) and validation (n = 228) cohort, we calculated change rates and performed ROC analyses of gait tests and EDSS including Functional System Scores.RESULTS: Between disability stages of EDSS 0-2.5 and EDSS 3.0-4.0, the mean TTW difference was 4s (T25FW = 0.9s). The accuracy to separate between EDSS groups was moderate but identical for both tests (ROC-AUC T25FW = 0.79, TTW = 0.80, p = 0.4). TTW had a higher sensitivity and specificity to differentiate between asymptomatic and symptomatic patients concerning FS motor/cerebellar scores (ROC-AUC T25FW = 0.71, TTW = 0.75, p < 0.05). All hypotheses could be validated in the second cohort.CONCLUSION: A 3-m Timed Tandem Walk is a standardized test that is easy to implement to detect impairment of the motor or cerebellar system in fully ambulatory MS patients. Based on the complex-task character, TTW is a potential new outcome measure for MS mobility in mildly disabled patients and can act as easily accessible and significant additional information in patient counseling.
AB - BACKGROUND: Mobility assessment in Multiple Sclerosis (MS) is crucial for trials and individual patient counseling. Up to now, standard tests as the Timed 25-Foot Walk (T25FW) are restricted by floor effects in mildly disabled patients. The 3-meter Timed Tandem Walk (TTW) as a possibly more sensitive measure has not been investigated yet.OBJECTIVE: To investigate sensitivity and specificity of the TTW and T25FW to detect mild clinical impairment in a large cohort of MS patients.METHODS: We extracted T25FW, TTW and EDSS from our UMC patient database (2009-2012). After randomization into an explorative (n = 497) and validation (n = 228) cohort, we calculated change rates and performed ROC analyses of gait tests and EDSS including Functional System Scores.RESULTS: Between disability stages of EDSS 0-2.5 and EDSS 3.0-4.0, the mean TTW difference was 4s (T25FW = 0.9s). The accuracy to separate between EDSS groups was moderate but identical for both tests (ROC-AUC T25FW = 0.79, TTW = 0.80, p = 0.4). TTW had a higher sensitivity and specificity to differentiate between asymptomatic and symptomatic patients concerning FS motor/cerebellar scores (ROC-AUC T25FW = 0.71, TTW = 0.75, p < 0.05). All hypotheses could be validated in the second cohort.CONCLUSION: A 3-m Timed Tandem Walk is a standardized test that is easy to implement to detect impairment of the motor or cerebellar system in fully ambulatory MS patients. Based on the complex-task character, TTW is a potential new outcome measure for MS mobility in mildly disabled patients and can act as easily accessible and significant additional information in patient counseling.
U2 - 10.1016/j.jns.2014.08.001
DO - 10.1016/j.jns.2014.08.001
M3 - SCORING: Journal article
C2 - 25156343
VL - 346
SP - 99
EP - 106
JO - J NEUROL SCI
JF - J NEUROL SCI
SN - 0022-510X
IS - 1-2
ER -