Another Round: Influence of Alcohol-Related Conditions and Other Drug Use-Related Disorders in Emergency Department Frequent Use - A Single-Site Matched Case-Control Study in Spain.

ABSTRACT

INTRODUCTION: Patients who make 5 or more visits per year to hospital emergency departments (EDs) are usually considered ED frequent users (FUs). This study aims to better characterize the influence of alcohol and other drug use-related disorders in this phenomenon in a European Mediterranean country with public, universal, tax-financed healthcare system. METHODS: Matched case-control study. Cases were adults between 18 and 65 years old who consulted 5 or more times the ED of a tertiary hospital in Spain between December 2018 and November 2019. Each case was assigned a control of the same age and gender, who appeared to the ED on the same day, but who made 4 visits or less to the service during the study period. The electronic record of the first ED visit during this period was used to extract the variables of interest emergency care received, clinical and social characteristics. Predictors of frequent ED use were identified with conditional logistic regression. RESULTS: 609 case-control pairs (total n = 1,218) were selected. History of alcohol-related conditions (adjusted odds ratio [AOR] = 1.82 [95% CI 1.26-2.64] p = 0.001) and also other drug use-related disorders (AOR = 1.50 [95% CI 1.11-2.03] p = 0.009) significantly increased the probability of frequent use of emergency services. DISCUSSION/CONCLUSION: Alcohol-related conditions and other drug use-related disorders must be evaluated in all ED FUs. Specific action protocols to concurrently address repeated attendance and addictions in the emergency room could be a good tool to reduce frequent ED use.