Substance abuse treatment and emergency department utilization among a cohort of HIV-infected persons with alcohol problems

Emergency Department Use, Hospitalization, and Their Sociodemographic Determinants among Patients with Substance-Related Disorders: A Worldwide Systematic Review and Meta-Analysis

Background: Identifying the determinants of emergency department (ED) use and hospitalization among patients with substance-related disorders (SRD) can help inform healthcare services and case management regarding their unmet health needs and strategies to reduce their acute care. Objectives: The present study aimed to identify sociodemographic characteristics, type of used drug, and risky behaviors associated with ED use and hospitalization among patients with SRD. Methods: Studies in English published from January 1st, 1995 to April 30th, 2022 were searched from PubMed, Scopus, Cochrane Library, and Web of Science to identify primary studies on ED use and hospitalization among patients with SRD. Results: Of the 17,348 outputs found, a total of 39 studies met the eligibility criteria. Higher ED use and hospitalization among patients with SRD were associated with a history of homelessness (ED use: OR = 1.93, 95%CI = 1.32-2.83; hospitalization: OR = 1.53, 95%CI = 1.36-1.73) or of injection drug use (ED use: OR = 1.34, 95%CI = 1.13-1.59; hospitalization: OR = 1.42, 95%CI = 1.20-1.69). Being female (OR = 1.24, 95%CI = 1.14-1.35), using methamphetamine (OR = 1.99, 95%CI = 1.24-3.21) and tobacco (OR = 1.25, 95%CI = 1.11-1.42), having HIV (OR = 1.70, 95%CI = 1.47-1.96), a history of incarceration (OR = 1.90, 95%CI = 1.27-2.85) and injury (OR = 2.62, 95%CI = 1.08-6.35) increased ED use only, while having age over 30  years (OR = 1.40, 95%CI = 1.08-1.81) and using cocaine (OR = 1.60, 95%CI = 1.32-1.95) increased hospitalization only among patients with SRD. Conclusions: The finding outline the necessity of developing outreach program and primary care referral for patients with SRD. Establishing a harm reduction program, incorporating needle/syringe exchange programs, and safe injection training with the aim of declining ED use and hospitalization, is likely be another beneficial strategy for patients with SRD.

Identification of emergency department patients for referral to rapid-access addiction services

OBJECTIVES

Substance-related emergency department (ED) visits are rapidly increasing. Despite this finding, many EDs do not have access to on-site addiction services. This study characterized substance-related ED presentations and assessed the ED health care team's perceived need for an on-site rapid-access addiction clinic for direct patient referral from the ED.

METHODS

This prospectively enrolled cohort study was conducted at an urban tertiary care ED from June to August 2018. Adult ED patients with problematic or high-risk substance use were enrolled by ED staff using a one-page form. The electronic and paper records from the index ED visit were reviewed. The primary outcome evaluated whether the ED health care team would have referred the patient to an on-site rapid-access addiction clinic, if one were available.

RESULTS

We received 557 enrolment forms and 458 were included in the analysis. Median age was 35 years, and 64% of included patients were male. Alcohol was the most commonly reported substance of problematic or high-risk use (60%). Previous ED visits within 7 days of the index visit were made by 28% of patients. The ED health care team indicated "Yes" for rapid-access addiction clinic referral from the ED for 66% of patients, with a mean of 4.3 patients referred per day during the study period.

CONCLUSIONS

At least four patients per day would have been referred to an on-site rapid-access addiction clinic from the ED, had one been available. This indicates a gap in care and collaborating with other sites that have successfully implemented this clinic model is an important next step.

Behavioral Interventions Targeting Alcohol Use Among People Living with HIV/AIDS: A Systematic Review and Meta-Analysis

Alcohol use is often reported among people living with HIV/AIDS (PLWHA) and is associated with increased sexual risk and poor medication adherence. This meta-analysis evaluated the efficacy of behavioral interventions addressing alcohol use among PLWHA. Twenty-one studies (N = 8461 PLWHA) that evaluated an individual-level intervention addressing alcohol use alone or as part of a more comprehensive alcohol/HIV intervention, included a control condition, and were available through December 2016 were included. Independent raters coded study, sample, and intervention content. Weighted mean effect sizes, using random-effects models, were calculated. Results indicate that interventions reduced alcohol consumption, increased condom use, and improved medication adherence relative to controls (d +s = 0.10-0.24). Plasma viral load was also reduced in intervention versus control participants (d + = 0.14, 95% CI = 0.02, 0.26; k = 7). These findings show that behavioral interventions addressing alcohol use can successfully reduce alcohol consumption and also improve HIV-related outcomes among PLWHA.

No detectable association between frequency of marijuana use and health or healthcare utilization among primary care patients who screen positive for drug use

BACKGROUND

Marijuana is the most commonly used illicit drug, yet its impact on health and healthcare utilization has not been studied extensively.

METHODS

To assess the cross-sectional association between frequency of marijuana use and healthcare utilization (emergency department and hospitalization) and health (comorbidity, health status), we studied patients in an urban primary care clinic who reported any recent (past 3-month) drug use (marijuana, opioids, cocaine, others) on screening. Frequency of marijuana use in the past 3 months was the main independent variable [daily/ almost daily, less than daily and no use (reference group)]. Outcomes assessed were past 3-month emergency department or hospital utilization, the presence of medical comorbidity (Charlson index ≥ 1), and health status with the EuroQol. We used separate multivariable regression models adjusting for age, sex, tobacco and other substance use.

RESULTS

All 589 participants reported recent drug use: marijuana 84 % (29 % daily, 55 % less than daily), cocaine 25 %, opioid 23 %, other drugs 8 %; 58 % reported exclusive marijuana use. Frequency of marijuana use was not significantly associated with emergency department use {adjusted odds ratio [AOR] 0.67, [95 % confidence interval (CI) 0.36, 1.24] for daily; AOR 0.69 [95 % CI 0.40,1.18] for less than daily versus no use}, hospitalization [AOR 0.79 (95 % CI 0.35, 1.81) for daily; AOR 1.23 (95 % CI 0.63, 2.40) for less than daily versus no use], any comorbidity [AOR 0.62, (95 % CI 0.33, 1.18) for daily; AOR 0.67 (95 % CI 0.38, 1.17) for less than daily versus no use] or health status (adjusted mean EuroQol 69.1, 67.8 and 68.0 for daily, less than daily and none, respectively, global p = 0.78).

CONCLUSIONS

Among adults in primary care who screen positive for any recent illicit or non-medical prescription drug use, we were unable to detect an association between frequency of marijuana use and health, emergency department use, or hospital utilization.

Differences in HIV risk behavior of injection drug users in New York City by health care setting

The purpose of this study is to examine the HIV risk behaviors and demographic characteristics of injection drug users (IDUs) by type of health care setting, which can inform development of tailored structural interventions to increase access to HIV prevention and medical treatment services. IDU syringe customers were recruited from pharmacies as part of the "Pharmacist As Resources Making Links to Community Services" (PHARM-Link) study, a randomized community-based intervention in New York City (NYC) aimed at connecting IDUs to HIV prevention, medical, and social services. An ACASI survey ascertained demographics, risk behavior, health-care utilization, and location where health care services were received in the past year. Data were analyzed using logistic regression. Of 602 participants, 34% reported receiving health care at a community clinic, 46% a private medical office, 15% a mobile medical unit, and 59% an emergency room (ER). After adjustment, participants who attended a community clinic were significantly more likely to have health insurance, report syringe sharing, and be HIV positive. Whites, nondaily injectors, insured, and higher income IDUs were more likely to attend a private medical office. Participants who recently used a case manager and had multiple sexual partners were more likely to use a mobile medical unit. ER attendees were more likely to be homeless and report recent drug treatment use. These findings show that IDU demographics and risk behaviors differ by health care setting, suggesting that risk reduction interventions should be tailored to health care settings. Specifically, these data suggest that community clinics and mobile medical units serve high-risk IDUs, highlighting the need for more research to develop and test innovative prevention and care programs within these settings.

Frequent emergency department use among released prisoners with human immunodeficiency virus: characterization including a novel multimorbidity index

OBJECTIVES

The objective was to characterize the medical, social, and psychiatric correlates of frequent emergency department (ED) use among released prisoners with human immunodeficiency virus (HIV).

METHODS

Data on all ED visits by 151 released prisoners with HIV on antiretroviral therapy (ART) were prospectively collected for 12 months. Correlates of frequent ED use, defined as having two or more ED visits postrelease, were described using univariate and multivariate models and generated medical, psychiatric, and social multimorbidity indices.

RESULTS

Forty-four (29%) of the 151 participants were defined as frequent ED users, accounting for 81% of the 227 ED visits. Frequent ED users were more likely than infrequent or nonusers to be female; have chronic medical illnesses that included seizures, asthma, and migraines; and have worse physical health-related quality of life (HRQoL). In multivariate Poisson regression models, frequent ED use was associated with lower physical HRQoL (odds ratio [OR] = 0.95, p = 0.02) and having not had prerelease discharge planning (OR = 3.16, p = 0.04). Frequent ED use was positively correlated with increasing psychiatric multimorbidity index values.

CONCLUSIONS

Among released prisoners with HIV, frequent ED use is driven primarily by extensive comorbid medical and psychiatric illness. Frequent ED users were also less likely to have received prerelease discharge planning, suggesting missed opportunities for seamless linkages to care.

Emergency department use by released prisoners with HIV: an observational longitudinal study

BACKGROUND

Many people living with HIV access healthcare systems through the emergency department (ED), and increased ED use may be indicative of disenfranchisement with primary HIV care, under-managed comorbid disease, or coincide with use of other healthcare resources. The goal of this study was to investigate ED use by HIV-infected prisoners transitioning to communities.

METHODS

We evaluated ED use by 151 HIV-infected released prisoners who were enrolled in a randomized controlled trial of directly administered versus self-administered antiretroviral therapy in Connecticut. Primary outcomes were quantity and type of ED visits and correlates of ED use were evaluated with multivariate models by Poisson regression.

RESULTS

In the 12 months post-release, there were 227 unique ED contacts made by 85/151 (56%) subjects. ED visits were primarily for acute febrile syndromes (32.6%) or pain (20.3%), followed by substance use issues (19.4%), trauma (18%), mental illness (11%), and social access issues (4.4%). Compared to those not utilizing the ED, users were more likely to be white, older, and unmarried, with less trust in their physician and poorer perceived physical health but greater social support. In multivariate models, ED use was correlated with moderate to severe depression (IRR = 1.80), being temporarily housed (IRR = 0.54), and alcohol addiction severity (IRR = 0.21) but not any surrogates of HIV severity.

CONCLUSIONS

EDs are frequent sources of care after prison-release with visits often reflective of social and psychiatric instability. Future interventions should attempt to fill resource gaps, engage released prisoners in continuous HIV care, and address these substantial needs.

Acute care hospital utilization among medical inpatients discharged with a substance use disorder diagnosis

OBJECTIVE

Hospital discharge may be an opportunity to intervene among patients with substance use disorders to reduce subsequent hospital utilization. This study determined whether having a substance use disorder diagnosis was associated with subsequent acute care hospital utilization.

METHODS

We conducted an observational cohort study among 738 patients on a general medical service at an urban, academic, safety-net hospital. The main outcomes were rate and risk of acute care hospital utilization (emergency department visit or hospitalization) within 30 days of discharge. The main independent variable was presence of a substance use disorder primary or secondary discharge diagnosis code at the index hospitalization.

RESULTS

At discharge, 17% of subjects had a substance use disorder diagnosis. These patients had higher rates of recurrent acute care hospital utilization than patients without substance use disorder diagnoses (0.63 vs 0.32 events per subject at 30 days, P < 0.01) and increased risk of any recurrent acute care hospital utilization (33% vs 22% at 30 days, P < 0.05). In adjusted Poisson regression models, the incident rate ratio at 30 days was 1.49 (95% confidence interval, 1.12-1.98) for patients with substance use disorder diagnoses compared with those without. In subgroup analyses, higher utilization was attributable to those with drug diagnoses or a combination of drug and alcohol diagnoses, but not to those with exclusively alcohol diagnoses.

CONCLUSIONS

Medical patients with substance use disorder diagnoses, specifically those with drug use-related diagnoses, have higher rates of recurrent acute care hospital utilization than those without substance use disorder diagnoses.

Emergency department utilization among HIV-infected patients in a multisite multistate study

OBJECTIVE

The aim of this study was to examine Emergency Department (ED) utilization and clinical and sociodemographic correlates of ED use among HIV-infected patients.

METHODS

During 2003, 951 patients participated in face-to-face interviews at 14 HIV clinics in the HIV Research Network. Respondents reported the number of ED visits in the preceding 6 months. Using logistic regression, we identified factors associated with visiting the ED in the last 6 months and admission to the hospital from the ED.

RESULTS

Thirty-two per cent of respondents reported at least one ED visit in the last 6 months. In multivariate analysis, any ED use was associated with Medicaid insurance, high levels of pain (the third or fourth quartile), more than seven primary care visits in the last 6 months, current or former illicit drug use, social alcohol use and female gender. Of those who used ED services, 39% reported at least one admission to the hospital. Patients with pain in the highest quartile reported increased admission rates from the ED as did those who made six or seven primary care visits, or more than seven primary care visits vs. three or fewer.

CONCLUSIONS

The likelihood of visiting the ED has not diminished since the advent of highly active antiretroviral therapy (HAART). More ED visits are to treat illnesses not related to HIV or injuries than to treat direct sequelae of HIV infection. With the growing prevalence of people living with HIV infection, the numbers of HIV-infected patients visiting the ED may increase, and ED providers need to understand potential complications produced by HIV disease.

Translational methods in biostatistics: linear mixed effect regression models of alcohol consumption and HIV disease progression over time

Longitudinal studies are helpful in understanding how subtle associations between factors of interest change over time. Our goal is to apply statistical methods which are appropriate for analyzing longitudinal data to a repeated measures epidemiological study as a tutorial in the appropriate use and interpretation of random effects models. To motivate their use, we study the association of alcohol consumption on markers of HIV disease progression in an observational cohort. To make valid inferences, the association among measurements correlated within a subject must be taken into account. We describe a linear mixed effects regression framework that accounts for the clustering of longitudinal data and that can be fit using standard statistical software. We apply the linear mixed effects model to a previously published dataset of HIV infected individuals with a history of alcohol problems who are receiving HAART (n = 197). The researchers were interested in determining the effect of alcohol use on HIV disease progression over time. Fitting a linear mixed effects multiple regression model with a random intercept and random slope for each subject accounts for the association of observations within subjects and yields parameters interpretable as in ordinary multiple regression. A significant interaction between alcohol use and adherence to HAART is found: subjects who use alcohol and are not fully adherent to their HIV medications had higher log RNA (ribonucleic acid) viral load levels than fully adherent non-drinkers, fully adherent alcohol users, and non-drinkers who were not fully adherent. Longitudinal studies are increasingly common in epidemiological research. Software routines that account for correlation between repeated measures using linear mixed effects methods are now generally available and straightforward to utilize. These models allow the relaxation of assumptions needed for approaches such as repeated measures ANOVA, and should be routinely incorporated into the analysis of cohort studies.

Alcohol problems and health care services use in human immunodeficiency virus (HIV)-infected and HIV-uninfected veterans

BACKGROUND

Although alcohol problems are common in human immunodeficiency virus (HIV)-infected patients, their impact on health care services use in HIV-infected patients is not well understood.

OBJECTIVE

We sought to examine the association between alcohol problems and health care services use in HIV-infected and HIV-uninfected patients.

DESIGN, SETTING, AND SUBJECTS

We undertook a prospective analysis of 16,048 HIV-infected veterans and 32,096 age-, race-, gender-, and region-matched HIV-uninfected controls identified through the national Veterans Affairs electronic administrative medical record database. We identified subjects with alcohol problems using ICD-9-CM codes for alcohol diagnoses and/or alcohol-related complications.

MAIN OUTCOME MEASURES

We measured outpatient visits, emergency department visits, and inpatient hospitalizations over 12 months of follow-up.

RESULTS

In adjusted analyses, HIV-infected veterans with alcohol problems were significantly more likely than HIV-uninfected veterans without alcohol problems to have at least 1 outpatient visit and at least 1 inpatient hospitalization and, among those with any health services use, to have significantly greater rates for outpatient visits (Incidence rate ratio [IRR] 2.17; 95% confidence interval [CI] 2.06-2.28; P < 0.001), emergency department visits (IRR 1.46; 95% CI 1.35-1.58; P < 0.001), and inpatient hospitalizations (IRR 1.46; 95% CI 1.30-1.64; P < 0.001). The incidence rates for outpatient visits, mental health visits, emergency department visits, and inpatient hospitalizations were significantly higher in HIV-infected veterans with alcohol problems than in HIV-infected veterans without alcohol problems. We did not find a consistent interaction effect between alcohol problems and HIV status.

CONCLUSION

Alcohol problems are associated with greater outpatient, emergency department, and inpatient health care utilization in HIV-infected and HIV-uninfected veterans. However, alcohol does not appear to have a stronger effect on health services use in HIV-infected veterans compared with HIV-uninfected veterans.

Factors associated with emergency room use among injection drug users of African-American, Hispanic and White-European background

This study examined the relationship between substance abuse treatment use, health services use, HIV status, and emergency room/hospital use for 507 injection drug users (IDUs). Logistic regression models showed that mental health status, severity of drug use and private health insurance were significantly associated with having used emergency room/hospital services in the past six months. History of substance abuse treatment use, positive HIV/AIDS diagnosis, mental health service use, ethnic/racial background, gender, age, education and homelessness were not significant at either the bivariate or the multivariate level. These results point to the need to improve mental health screening and referrals through emergency room medical systems.

Episodic homelessness and health care utilization in a prospective cohort of HIV-infected persons with alcohol problems

BACKGROUND

Because individuals with HIV/AIDS often have complex medical and social needs, the impact of housing status on medical service utilization is difficult to isolate from the impact of conditions that may worsen during periods of homelessness such as depression and substance abuse. We examine whether episodes of homelessness are independently associated with suboptimal medical utilization even when accounting for concurrent addiction severity and depression.

METHODS

We used data from a 30-month cohort of patients with HIV/AIDS and alcohol problems. Housing status, utilization (ambulatory visits, emergency department (ED) visits, and hospitalizations) and other features were assessed with standardized research interviews at 6-month intervals. Multivariable longitudinal regression models calculated incidence rate ratios (IRR) comparing utilization rates during 6-month intervals (homeless versus housed). Additional models assessed whether addiction severity and depressive symptoms could account for utilization differences.

RESULTS

Of the 349 subjects, 139 (39%) reported homelessness at least once during the study period; among these subjects, the median number of nights homeless per 6-month interview period was 30. Homelessness was associated with higher ED utilization (IRR = 2.17; 95% CI = 1.72-2.74) and hospitalizations (IRR = 2.30; 1.70-3.12), despite no difference in ambulatory care utilization (IRR = 1.09; 0.89-1.33). These associations were attenuated but remained significant when adjusting for addiction severity and depressive symptoms.

CONCLUSION

In patients with HIV/AIDS and alcohol problems, efforts to improve housing stability may help to mitigate intensive medical utilization patterns.