Analysis on the risk factors of residual symptoms after reduction of benign paroxysmal positional vertigo

ObjectiveTo analyze the risk factors of residual symptoms after reduction of benign paroxysmal positional vertigo(BPPV).

MethodsA total of 120 BPPV patients with successful reduction were divided into the non-residual group and residual group according to the presence or absence of residual symptoms.The independent risk factors of residual symptoms were analyzed using logistic regression analysis after BPPV reduction.The ROC curve was used to evaluate the predictive value of each index.

ResultsThe differences of the gender, etiology, affected side and affected semicircular canal were not statistically significant(P>0.05), while the differences of the age, presence or absence of underlying disease, duration of symptoms, SAS score, number of resets and VNG use were statistically significant between the two groups(P < 0.05).The results of logistic regression analysis showed that the age, basic disease, number of reductions and VNG use were the independent risk factors of residual symptoms after BPPV reduction.The area under ROC curve of each index were 0.778, 0.634, 0.365 and 0.357, respectively.

ConclusionsThe patients with underlying diseases and more than 3 times of reduction are prone to have residual symptoms.The residual symptoms in patients applying VGN should be paid close attention to, especial for the elderly.