Medication status and related factors in essential tremor patients: a cross-sectional study in China.

INTRODUCTION: Essential Tremor (ET) is one of the most common movement disorders. Oral drugs play a crucial role in treating ET, with various available options such as propranolol, primidone and topiramate. However, the medication status and related factors among Chinese ET patients are unknown yet.

METHODS: This study used the baseline data from the National Survey of Essential Tremor Plus in China cohort. ET patients with information related to medication intake were included. Medication patients was defined as patients who were taking medication at the time of the survey. We further defined recommended medication users according to Chinese guideline recommendations and clinical knowledge. We used mean and standard deviation (SD), median and interquartile range (IQR), or frequencies and percentages when appropriate for descriptive analysis. We used multivariate logistic regression analyses to explore factors related to medication intake in all ET patients, and in recommended medication users respectively.

RESULTS: Of 1153 included ET participants, 207 (18.0%) took medication. Arotinolol (115, 55.6%) and propranolol (63, 30.4%) were the top 2 used medicines. Patients with middle school education (odds ratio 0.57, 95% confidence interval 0.39 to 0.83), college or higher level education (0.46, 0.28 to 0.76) and late onset ET (LO-ET) (0.38, 0.23 to 0.63) were less likely to take medication. Patients with intention tremor (1.90, 1.38 to 2.62), every 10-unit increase in age (1.10, 1.00 to 1.21), Tremor Research Group Essential Tremor Rating Assessment Scale (TETRAS) Part 1 (1.63, 1.37 to 1.93), and TETRAS Part 2 (1.81, 1.48 to 2.22) were more likely to take medication. Among 332 recommended medication users, only 104 (31.3%) took medicine. The associations of LO-ET (0.36, 0.17 to 0.75), intention tremor (2.27, 1.35 to 3.81), TETRAS Part1 (1.52, 1.09 to 2.13) and TETRAS Part 2 (1.59, 1.15 to 2.20) with medication were similar to all ET patients.

CONCLUSION: The proportion of medication intake is low among both all ET patients and recommended medication users. The top two commonly used medications among all ET patients are arotinolol and propranolol. Influencing factors of medication intake are different between all ET patients and recommended medication users. Clinicians are suggested to provide counseling and education on ET medication to promote medication intake.