Key result
Single reaction time measurement lacks sufficient sensitivity to evaluate low-back pain severity.
Why the study?
Does reaction time measurement accurately diagnose or evaluate the severity of chronic low-back pain compared to healthy controls?
Case-Control (n=165)
Does reaction time measurement accurately diagnose or evaluate the severity of chronic low-back pain compared to healthy controls?
A single reaction time measurement is not clinically useful for evaluating the severity of chronic low-back pain due to low sensitivity.
Answers are grounded in this paper and cite their sources.
Single reaction time tests lack sensitivity for low-back pain severity assessment; leaves open whether serial measures or multimodal testing improve utility.
The effect of ethanol on reaction times was studied in 5 healthy men to test the construct validity of the measure. Reaction times were studied among 61 healthy controls and 99 patients with chronic low-back pain (68 moderate and 31 severe) to evaluate the diagnostic value of reaction time measurements. Analysis of receiver operating characteristics was used to calculate the discriminative power of the reaction time measurements. The severity of low-back pain was associated with slow reaction times but the diagnostic value of a single reaction time measurement was low due to insufficient sensitivity. In conclusion, even though many patients with low-back pain suffer from central impairment of motor function, a single reaction time measurement is not usable in evaluation of the severity of low-back pain.
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Luoto et al. (1998) conducted a case-control in Chronic low-back pain (n=165). Chronic low-back pain vs. Healthy controls was evaluated on Reaction times and their diagnostic value. Although severity of low-back pain was associated with slow reaction times, a single reaction time measurement had low diagnostic value for evaluating pain severity due to insufficient sensitivity.
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