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Prediction of the prognosis of Bell's palsy using multivariate analyses
Munetaka Ushio1, Kenji Kondo, Naonobu Takeuchi
1Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Bunkyo-ku, Tokyo, Japan. IZT01356@nifty.ne.jp
Objectives:
This study aimed to establish more reliable formulae for predicting the prognosis for patients with Bell's palsy at initial examination.
Patients:
One hundred four consecutive patients with Bell's palsy whose facial movement was either completely recovered or unchanged for more than 6 months.
Intervention:
Diagnostic.
Main Outcome Measures:
Multivariate analyses were performed using the following variables: Age, House-Brackmann score (H-B), electroneuronography (ENoG), nerve excitability test (NET), blink reflex, and stapedial muscle reflex on initial examination.
Results:
Duration to maximal recovery can be predicted with the adjusted coefficient of 0.51 using H-B, ENoG, stapedial muscle reflex, and NET. Whether complete recovery would be achieved can be predicted with the Nagelkerke coefficient of determination of 0.72 using age, H-B, ENoG, and NET.
Conclusion:
This study suggested that the prognosis of patients who recovered early can be predicted more precisely; however, the prognosis of patients who recovered late and incomplete could not be predicted easily.