Hoovers sign for the diagnosis of functional weakness: A prospective unblinded cohort study in patients with suspected stroke
Journal of Psychosomatic Research, 10/11/2011
In this cohort, Hoover's sign was moderately sensitive and very specific for a diagnosis of functional weakness.
Hoover's sign was tested as part of the diagnostic work–up of 337 patients presenting to hospital with suspected stroke.
The authors made a gold–standard diagnosis of stroke, functional disorder, or other diagnosis based on clinical history and examination, imaging and clinical follow–up.
The authors calculated the sensitivity, specificity, positive and negative predictive values of Hoover's sign for a diagnosis of functional weakness in patients who presented with leg weakness.
The authors consecutively recruited 337 consecutive patients with suspected stroke, 124 of whom presented with leg weakness. 8 of these patients had a diagnosis of functional disorder.
The sensitivity of Hoover's sign for a diagnosis of functional weakness in those who presented with leg weakness was 63% (95% CI: 24 to 91), and the specificity was 100% (95% CI: 97 to 100).