{'fraction_non_alphanumeric': 0.04672897196261682, 'fraction_numerical': 0.04672897196261682, 'mean_word_length': 5.03169014084507, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Prevalence and Associated Factors of Neurovascular Contact in Patients With Hemifacial Spasm

PurposeThis study aimed to observe the prevalence and associated factors of neurovascular contact hemifacial spasm (HFS). DesignThis was a cross-sectional analytical study. MethodsMedical records of patients with HFS in a neuro-ophthalmology clinic in Thailand between June 2008 and June 2012 were reviewed. A positive magnetic resonance imaging finding was defined as an adjacent variant vessel that directly compressed or placed pressure on the affected facial nerve. Prevalence and associated factors were analyzed. ResultsA total of 60 participants were enrolled, composed of 12 male patients and 48 female patients with a median age of 54 years [interquartile range (IQR), 44.0–64.75] and a disease duration ranging from 4 months to 16 years (median, 2 years; IQR, 1.0–6.0). The prevalence of neurovascular contact HFS was 41.7%. Neurovascular contact HFS was more prevalent among women, with an overall ratio of 3.33. In age group analysis, the prevalence was higher among older patients. In univariate analysis, right-sided symptoms and diabetes mellitus were statistically significant in their association with neurovascular contact HFS (P = 0.040 and P = 0.029, respectively). Right-sided symptoms were significant in a multiple logistic regression analysis (P = 0.038), with an odds ratio of 3.30 [95% confidence interval (CI), 1.07–10.15]. Diabetes mellitus was not statistically significant (P = 0.051), with an odds ratio of 9.99 (95% CI 0.99–96.34). ConclusionsThe prevalence of neurovascular contact in patients with HFS was 41.7%. Right-sided symptoms were significantly associated with this condition.