Screening for problematic opioid use in the emergency department: Comparison of two screening measures.

Study objective: Earlier intervention for opioid use disorder (OUD) may reduce long-term health implications. Emergency departments (EDs) in the United States treat millions with OUD annually who may not seek care elsewhere. Our objectives were (1) to compare two screening measures for OUD characterization in the ED and (2) to determine the proportion of ED patients screening positive for OUD and those who endorse other substance use to guide future screening programs. Methods: A cross-sectional study of randomly selected adult patients presenting to three Midwestern US EDs were enrolled, with duplicate patients excluded. Surveys were administered via research assistant and documented on tablet devices. Demographics were self-reported, and OUD positivity was assessed by the DSM 5 checklist and the WHO ASSIST 3.1. The primary outcome was the concordance between two screening measures for OUD. Our secondary outcome was the proportion of ED patients meeting OUD criteria and endorsed co-occurring substance use disorder (SUD) criteria. Results: We enrolled 1305 participants; median age of participants was 46 years (range 18-84), with 639 (49.0%) Non-Hispanic, White, and 693 (53.1%) female. Current OUD positivity was identified in 17% (222 out of 1305) of the participants via either DSM-5 (two or more criteria) or ASSIST (score of 4 or greater). We found moderate agreement between the measures (kappa = 0.56; Phi coefficient = 0.57). Of individuals screening positive for OUD, 182 (82%) endorsed criteria for co-occurring SUD. Conclusions: OUD is remarkably prevalent in ED populations, with one in six ED patients screening positive. We found a high prevalence of persons identified with OUD and co-occurring SUD, with moderate agreement between measures. Developing and implementing clinically feasible OUD screening in the ED is essential to enable intervention.

Characterizing Air Medical Transport Experiences in Emergency Medicine Residency Training Programs.

OBJECTIVE: Air medical transportation (AMT) of patients plays a critical role in the prehospital care of the ill patient. Despite its importance, there is no requirement in emergency medicine training programs to have direct experience or education on the topic, and data detailing current AMT experiences across programs are limited. METHODS: A survey detailing program characteristics, AMT experience characteristics, and curriculum factors relating to AMT experience was sent to all 275 credentialed emergency medicine residency training programs in the United States. Our outcomes were to describe the characteristics of AMT and non-AMT programs (proportions) and to evaluate associations (odds ratios with 95% confidence intervals) between program characteristics and 1) AMT experience opportunity and 2) level of resident participation among AMT programs. RESULTS: Two hundred (73%) programs responded, with 135 of 200 (68%) offering some type of AMT experience. The majority of programs offering AMT were 3 years (113 [84%]), university based (63 [47%]), and located in small urban areas (57 [42%]). When AMT was offered, most programs reported that the overall resident participation was low (≤ 20%). Programs that did not offer shift reduction or additional pay for participation in AMT were significantly more likely to have low participation than those with incentives (odds ratio = 4.8; 95% confidence interval, 1.8-15.3). Around one third of AMT experiences allowed for direct patient care. Less than half of the responding programs reported a dedicated AMT curriculum. CONCLUSION: The majority of emergency medicine residency training programs offer an AMT experience, but this experience is highly variable, and overall participation by residents is low. Given the importance of AMT in the care of emergency patients, standardization and increased access to AMT experience and education should be considered by emergency medicine training programs moving forward.

Evaluation of a large-scale health department naloxone distribution program: Per capita naloxone distribution and overdose morality.

OBJECTIVES: To report per-capita distribution of take-home naloxone to lay bystanders and evaluate changes in opioid overdose mortality in the county over time. METHODS: Hamilton County Public Health in southwestern Ohio led the program from Oct 2017-Dec 2019. Analyses included all cartons distributed within Hamilton County or in surrounding counties to people who reported a home address within Hamilton County. Per capita distribution was estimated using publicly available census data. Opioid overdose mortality was compared between the period before (Oct 2015-Sep 2017) and during (Oct 2017-Sep 2019) the program. RESULTS: A total of 10,416 cartons were included for analyses, with a total per capita distribution of 1,275 cartons per 100,000 county residents (average annual rate of 588/100,000). Median monthly opioid overdose mortality in the two years before (28 persons, 95% CI 25-31) and during (26, 95% CI 23-28) the program did not differ significantly. CONCLUSIONS: Massive and rapid naloxone distribution to lay bystanders is feasible. Even large-scale take-home naloxone distribution may not substantially reduce opioid overdose mortality rates.

Predicting at-risk opioid use three months after ed visit for trauma: Results from the AURORA study.

OBJECTIVE: Whether short-term, low-potency opioid prescriptions for acute pain lead to future at-risk opioid use remains controversial and inadequately characterized. Our objective was to measure the association between emergency department (ED) opioid analgesic exposure after a physical, trauma-related event and subsequent opioid use. We hypothesized ED opioid analgesic exposure is associated with subsequent at-risk opioid use. METHODS: Participants were enrolled in AURORA, a prospective cohort study of adult patients in 29 U.S., urban EDs receiving care for a traumatic event. Exclusion criteria were hospital admission, persons reporting any non-medical opioid use (e.g., opioids without prescription or taking more than prescribed for euphoria) in the 30 days before enrollment, and missing or incomplete data regarding opioid exposure or pain. We used multivariable logistic regression to assess the relationship between ED opioid exposure and at-risk opioid use, defined as any self-reported non-medical opioid use after initial ED encounter or prescription opioid use at 3-months. RESULTS: Of 1441 subjects completing 3-month follow-up, 872 participants were included for analysis. At-risk opioid use occurred within 3 months in 33/620 (5.3%, CI: 3.7,7.4) participants without ED opioid analgesic exposure; 4/16 (25.0%, CI: 8.3, 52.6) with ED opioid prescription only; 17/146 (11.6%, CI: 7.1, 18.3) with ED opioid administration only; 12/90 (13.3%, CI: 7.4, 22.5) with both. Controlling for clinical factors, adjusted odds ratios (aORs) for at-risk opioid use after ED opioid exposure were: ED prescription only: 4.9 (95% CI 1.4, 17.4); ED administration for analgesia only: 2.0 (CI 1.0, 3.8); both: 2.8 (CI 1.2, 6.5). CONCLUSIONS: ED opioids were associated with subsequent at-risk opioid use within three months in a geographically diverse cohort of adult trauma patients. This supports need for prospective studies focused on the long-term consequences of ED opioid analgesic exposure to estimate individual risk and guide therapeutic decision-making.

Acceptance of HIV pre-exposure prophylaxis (PrEP) referral among a sample of PrEP-eligible emergency department patients.

OBJECTIVE: Pre-exposure prophylaxis (PreP) reduces the rate of HIV transmission in high-risk groups. Emergency departments (EDs) frequently encounter patients at risk for HIV acquisition who are eligible for PrEP. ED HIV screening programs have prioritized testing and linkage to care for patients who test positive, but fail to refer HIV-negative patients to PrEP clinicians. Our objective was to estimate referral acceptance to a PrEP clinician among a sample of at-risk ED patients. METHODS: This single-center cross-sectional study electronically queried a prospectively acquired dataset of survey responses from a sample of patients presenting to an urban academic ED from March 2019 to February 2020. Patients completed a risk assessment as part of the HIV screening program. PrEP eligibility was based off survey responses in accordance with 2017 CDC PrEP eligibility criteria. Identified PrEP-eligible patients completed a PrEP questionnaire. The primary outcome was the proportion of PrEP-eligible patients who accepted referral to a PrEP clinician during their ED encounter. We secondarily report patient participant characteristics including the proportion of PrEP-eligible patients who were aware of and were knowledgeable about PrEP as a method to prevent transmission of HIV. RESULTS: In total, 360 patients completed a PrEP questionnaire, of which 287 (80%) were not currently taking PrEP and eligible for PrEP referral. 57% were males, with 41% Black/African American. Of the 287 eligible for PrEP, 61 (21.3%, 95% CI: 16.8-26.5) indicated awareness of PrEP, of which, 49 (80.3%, 95% CI: 67.8-89.0) demonstrated accurate knowledge of PrEP. PrEP referral was offered to 238 (82.9%, 95% CI: 78.0-87.0) patients, of which, 76 (31.9%, 95% CI: 26.1-38.3) accepted. CONCLUSIONS: Approximately one third of PrEP-eligible ED patients accepted PrEP referral during their ED encounter, demonstrating an opportunity for increased PrEP education and intentional referral for eligible patients. Variability in PrEP acceptability by demographic and risk subgroup may be an important consideration in efforts to expand PrEP utilization.

Emergency department screening for latent tuberculosis infection.

OBJECTIVE: Approximately 12.4 million people in the U.S. have latent tuberculosis infection (LTBI), 73% of whom are non-U.S. born. Identification and treatment of LTBI are essential for tuberculosis eradication. We evaluated an emergency department (ED) - based LTBI screening and linkage to care program. METHODS: We queried electronic records of a clinical prevention program located in a Midwestern, urban, academic ED that serves as the region's safety-net hospital. Program staff approached non-U.S. born ED patients from TB endemic areas. Patients received QuantiFERON-TB Gold Plus (QFT) blood testing and, if positive, were referred to treatment. The primary outcome was the proportion of tested patients newly diagnosed with LTBI. We secondarily report the number of patients linked to care who initiated LTBI treatment. RESULTS: The program approached 33 patients, of whom 24 (72.7%) were eligible, and 23 (95.8%) were tested. The majority were male (13, 56.5%), median age was 33 years (IQR 27-45), and 13 (56.5%) were from Latin America. Three patients (13.0%, 95% CI 0.03-0.35) were newly diagnosed with LTBI and linked to care; two (66.7%) started LTBI treatment. CONCLUSIONS: In this first report of an ED-based LTBI screening program implemented in a region with low TB prevalence, over 10% of high-risk ED patients tested positive for LTBI and were linked to treatment. Screening populations at risk for LTBI in EDs and linking them to public health treatment services should be prioritized in order to achieve TB elimination in the U.S.

Comparison of HIV Screening Strategies in the Emergency Department: A Randomized Clinical Trial.

Importance: The National HIV Strategic Plan for the US recommends HIV screening in emergency departments (EDs). The most effective approach to ED-based HIV screening remains unknown. Objective: To compare strategies for HIV screening when integrated into usual ED practice. Design, Setting, and Participants: This randomized clinical trial included patients visiting EDs at 4 US urban hospitals between April 2014 and January 2016. Patients included were ages 16 years or older, not critically ill or mentally altered, not known to have an HIV positive status, and with an anticipated length of stay 30 minutes or longer. Data were analyzed through March 2021. Interventions: Consecutive patients underwent concealed randomization to either nontargeted screening, enhanced targeted screening using a quantitative HIV risk prediction tool, or traditional targeted screening as adapted from the Centers for Disease Control and Prevention. Screening was integrated into clinical practice using opt-out consent and fourth-generation antigen-antibody assays. Main Outcomes and Measures: New HIV diagnoses using intention-to-treat analysis, absolute differences, and risk ratios (RRs). Results: A total of 76 561 patient visits were randomized; median (interquartile range) age was 40 (28-54) years, 34 807 patients (51.2%) were women, and 26 776 (39.4%) were Black, 22 131 (32.6%) non-Hispanic White, and 14 542 (21.4%) Hispanic. A total of 25 469 were randomized to nontargeted screening; 25 453, enhanced targeted screening; and 25 639, traditional targeted screening. Of the nontargeted group, 6744 participants (26.5%) completed testing and 10 (0.15%) were newly diagnosed; of the enhanced targeted group, 13 883 participants (54.5%) met risk criteria, 4488 (32.3%) completed testing, and 7 (0.16%) were newly diagnosed; and of the traditional targeted group, 7099 participants (27.7%) met risk criteria, 3173 (44.7%) completed testing, and 7 (0.22%) were newly diagnosed. When compared with nontargeted screening, targeted strategies were not associated with a higher rate of new diagnoses (enhanced targeted and traditional targeted combined: difference, -0.01%; 95% CI, -0.04% to 0.02%; RR, 0.7; 95% CI, 0.30 to 1.56; P = .38; and enhanced targeted only: difference, -0.01%; 95% CI, -0.04% to 0.02%; RR, 0.70; 95% CI, 0.27 to 1.84; P = .47). Conclusions and Relevance: Targeted HIV screening was not superior to nontargeted HIV screening in the ED. Nontargeted screening resulted in significantly more tests performed, although all strategies identified relatively low numbers of new HIV diagnoses. Trial Registration: ClinicalTrials.gov Identifier: NCT01781949.

Missed HIV diagnoses when screening only emergency department patients who have blood samples obtained for other clinical purposes.

OBJECTIVE: Emergency departments (EDs) are highly valued settings for HIV screening. Most large-volume ED HIV screening programs have attenuated operational barriers by screening only ED patients who already have a blood sample available for other clinical reasons. Our objective was to estimate the proportion of HIV positive patients who are missed when an ED excludes patients for whom HIV screening would be the only indication to obtain a blood sample. METHODS: This cross-sectional analysis used existing electronic records of patients seen between 2017 and 2019 by an urban, academic ED and its HIV screening program, which includes patients regardless of whether they receive other ED blood testing. The primary outcome was the proportion of patients tested by the screening program who were newly diagnosed with HIV (Sample 1) for whom HIV screening would be the only indication for venipuncture. We secondarily 1) estimate the proportion of ED patients who received venipuncture using a representative sample of consecutively approached participants which prospectively recorded whether patients had blood obtained or intravenous catheter placement during usual ED care (Sample 2) and 2) report patient characteristics including HIV risk factors for those with and without ED venipuncture for both groups. RESULTS: Of 41 persons newly diagnosed with HIV by the ED screening program (Sample 1), 13 (31.7%, 95%CI 18.6-48.2) did not undergo venipuncture for any reason other than their HIV test. The proportion of ED visits without a venipuncture (Sample 2) was 44.2% (95% CI 41.9-46.6). Patient characteristics were similar for both groups. CONCLUSIONS: Screening only those patients with a blood sample already available or easily obtainable due to usual ED care, misses many opportunities for earlier HIV diagnosis. Innovation in research, policy, and practice is needed to overcome still unaddressed barriers to ED HIV screening when HIV screening is the only indication for collection of a biological sample.

Incidence of opioid use disorder in the year after discharge from an emergency department encounter.

OBJECTIVE: Therapeutic opioid exposure is associated with long-term use. How much later use is due to opioid use disorder (OUD) and the incidence of OUD without preceding therapeutic exposure are unknown. We preliminarily explored the association between emergency department opioid prescriptions and subsequent OUD. METHODS: This retrospective cohort study queried electronic health records for discharged adult patients in the year before (2014) and after (2016) their first encounter in 2015 at either of 2 EDs in a Midwestern healthcare system. OUD was defined by diagnosis codes and prescription history. Patients with OUD history before the index encounter were excluded. We report OUD incidence within 1 year, with time to first indicator of OUD among those with a repeat health system encounter post index using a Cox proportional hazards model. Secondary outcomes were sources of therapeutic opioid exposure and frequency of risk factors associated with OUD among those who developed OUD. RESULTS: Of the 49,904 unique, adult ED patients without history of OUD, 669 (1.3%; 95% CI, 1.2-1.4) had health records indicating OUD within 12 months. The proportion of ED patients with OUD at 12 months was 1.5% (95% CI, 1.2-1.9) if prescribed an opioid at index and 1.3% (95% CI, 1.2-1.4) if not. Of the 669 who developed OUD, 80 (12.0%) were prescribed an opioid at the index ED visit, 54 (8%) received an opioid prescription at a subsequent ED visit, and median time to OUD was 4.5 months (interquartile range 1.6-7.6, range 0.0-11.9). When controlling for demographics, mental health, and prior opioid prescriptions, there was no difference in OUD incidence between patients who did or did not receive an initial ED opioid prescription (HR, 1.1; 95% CI, 0.9-1.4). CONCLUSIONS: A small but meaningful proportion of the ED population will develop OUD within 1 year even without ED opioid prescription. Though we found no association between ED opioid prescription and later OUD, further study is warranted given the complexity factors influencing OUD incidence, ongoing ED opioid exposure, and limitations inherent to this study design.

Estimated proportion of an urban academic emergency department patient population eligible for HIV preexposure prophylaxis.

OBJECTIVE: Pre-exposure prophylaxis (PrEP) is a highly effective but underutilized method of HIV prevention. Emergency departments (EDs) have access to at-risk populations meeting CDC eligibility criteria for PrEP. Characterizing this population could help motivate, develop, and implement ED interventions to promote PrEP uptake. METHODS: This cross-sectional study explored the proportion of patients from an urban, academic ED who met CDC 2017 PrEP eligibility criteria using three existing datasets that mimic patient selection strategies for HIV screening: 1) study of consecutively approached ED patients from 2008 to 2009 (analogous to non-targeted screening), 2) patients of the ED's HIV screening program in 2017 (analogous to risk-targeted screening), and 3) electronic health record (EHR) diagnostic codes in 2017 (analogous to EHR selected screening). The primary outcome was the proportion eligible for PrEP referral. Secondary outcomes included proportion by risk group: men who have sex with men (MSM), heterosexual men and women (HMW), and persons who inject drugs (PWID). RESULTS: The proportion eligible for PrEP was: 568/1970 (28.8%, 95% CI: 26.9-30.9) for consecutively approached patients, 552/3884 (14%, 95% CI: 13-15) for risk-targeted patients, and 605/66287 (0.9%, 95% CI: 0.8-1.0) for EHR diagnoses of all patients. For the two datasets with behavioral risk information, the proportion eligible was: MSM 1-2%, HMW 12-28%, and PWID 1-4%. CONCLUSIONS: A large subgroup of this ED population was eligible for PrEP referral. EDs are a compelling setting for development and implementation of HIV prevention interventions to assist in national efforts to expand PrEP.

HIV detection by an emergency department HIV screening program during a regional outbreak among people who inject drugs.

OBJECTIVE: Multiple HIV outbreaks among persons who inject drugs (PWID) have occurred in the US since 2015. Emergency departments (EDs), recognized as essential venues for HIV screening, may play a unique role in identifying undiagnosed HIV among PWID, who frequently present for complications of injection drug use (IDU). Our objective was to describe changes in HIV diagnoses among PWID detected by an ED HIV screening program and estimate the program's contribution to HIV diagnoses among PWID county-wide during the emergence of a regional HIV outbreak. METHODS: This was a retrospective study of electronically queried clinical records from an urban, safety-net ED's HIV screening program and publicly available HIV surveillance data for its surrounding county, Hamilton County, Ohio. Outcomes included the change in number of HIV diagnoses and the ED's contribution to case identification county-wide, overall and for PWID during 2014-2018. RESULTS: During 2014-2018, the annual number of HIV diagnoses made by the ED program increased from 20 to 42 overall, and from 1 to 18 for PWID. We estimated that the ED contributed 18% of HIV diagnoses in the county and 22% of diagnoses among PWID. CONCLUSIONS: The ED program contributed 1 in 5 new HIV diagnoses among PWID county-wide, further illustrating the importance of ED HIV screening programs in identifying undiagnosed HIV infections. In areas experiencing increasing IDU, HIV screening in EDs can provide an early indication of increasing HIV diagnoses among PWID and can substantially contribute to case-finding during an HIV outbreak.

Variation in Participation in Nurse-Driven Emergency Department Hepatitis C Screening.

Emergency departments (EDs) are an important potential site for public health screening programs, although implementation of such programs can be challenging. Potential barriers include system-level issues (e.g., funding and time pressures) and individual provider-level issues (e.g., awareness and acceptance). This cross-sectional evaluation of a nurse-driven, triage-based hepatitis C virus (HCV) screening program in an urban, academic ED assessed variation in nurse participation from April to November 2017. For this program, electronic health record (EHR) prompts for HCV screening were integrated into nurses' triage workflow. Process measures evaluating HCV screening participation were abstracted from the EHR for all ED encounters with patient year of birth between 1945 and 1965. Registered nurses who routinely worked in triage and were full-time employees throughout the study period were included for analysis. The primary outcome was the proportion of eligible ED encounters with completed HCV screening, by nurse. Of 14,375 ED encounters, 3,375 (23.5%, 95% confidence interval [CI]: 22.8, 24.2) had completed HCV screening and 1,408 (9.8%, 95% CI: 3.9, 10.3) had HCV screening EHR sections opened by the triage nurse but closed without action; the remainder of encounters had no activity in HCV screening EHR sections. Among the 93 eligible nurses, 22 nurses (24%, 95% CI: 16, 34) completed HCV screening for more than 70% of encounters, whereas 10 nurses (11%, 95% CI: 6, 19) never completed HCV screening. The proportion of eligible encounters with completed HCV screening was 11.0% higher (95% CI: 9.8, 12.6) for encounters seen between 7 a.m. and 7 p.m. than between 7 p.m. and 7 a.m. (27.5% and 16.3%, respectively). In conclusion, wide variation in individual nurse participation in HCV screening suggests individual-level barriers are a more significant barrier to ED screening than previously recognized. Implementation research should expand beyond questions of resource availability and procedural streamlining to evaluate and address staff knowledge, beliefs, attitudes, and motivation.

Naloxone provision to emergency department patients recognized as high-risk for opioid use disorder.

INTRODUCTION: Patients with opioid use disorder (OUD) are at increased risk for overdose and death. Clinical practice guidelines and professional organization policy statements recommend providing naloxone to patients at risk for overdose. We sought to characterize fidelity to naloxone practice recommendations in a cohort of Emergency Department (ED) patients in whom opioid use disorder was suspected by the treating physician. METHODS: This single-center cross-sectional study evaluated electronic health records from an urban academic ED with 73,000 annual encounters in a region with a high prevalence of OUD. Patients ≥18 years old with encounters from January 1, 2018 to November 30, 2019 were included if discharged from the ED and either administered buprenorphine in the ED or referred to outpatient substance use treatment. The primary outcome measure was the percentage of included patients provided naloxone (take-home or prescription). We used random effects multivariable logistic regression (accounting for multiple patient encounters) to estimate the odds ratio (OR) for receiving naloxone. RESULTS: Of 1036 eligible patient encounters, 320 resulted in naloxone provision (30.9%, 95% CI: 28.1-33.8). Naloxone provision occurred for 33.6% (95% CI 30.5-36.7) of 900 patients referred to outpatient substance use treatment without ED buprenorphine administration, 10.6% (95% CI 5.0-19.2) of 85 patients administered buprenorphine and not referred to outpatient substance use treatment, and 17.6% (95% CI 8.4-30.9) of 51 patients administered buprenorphine and referred to outpatient treatment. After controlling for age, sex, race, and prior provision of naloxone, the administration of buprenorphine was associated with a 94% lower odds (aOR = 0.06 [95% CI 0.011-0.33]) for naloxone provision compared to those only referred to outpatient treatment. CONCLUSION: A majority of ED patients who received an intervention targeted at OUD, in an ED where take-home naloxone is freely available, did not receive either take-home naloxone or a prescription for naloxone at discharge. Patients receiving buprenorphine were less likely to receive naloxone than patients only referred to outpatient treatment. These data suggest barriers other than recognition of potential OUD and naloxone availability impact provision of naloxone and argue for a treatment "bundle" as a conceptual model for care of ED patients with suspected OUD.

Clarifying the volume of estimated need for public health and prevention services within an emergency department population.

OBJECTIVES: Emergency departments (EDs) are called to implement public health and prevention initiatives, such as infectious disease screening. The perception that ED resources are insufficient is a primary barrier. Resource needs are generally conceptualized in terms of total number of ED encounters, without formal calculation of the number of encounters for which a service is required. We illustrate potential differences in the estimated volume of service need relative to ED census using the examples of HIV and hepatitis C (HCV) screening. METHODS: This cross-sectional analysis adjusted the proportion of ED encounters in which patients are eligible for HIV and HCV screening according to a cascade of successively more restrictive patient selection criteria, presuming full implementation of each criterion. Parameter estimates for the proportion satisfying each selection criterion were derived from the electronic health records of an urban academic facility and its ED HIV and HCV screening program during 2 time periods. The primary outcome was the estimated reduction in proportion of ED visits eligible for screening after application of the entire cascade. RESULTS: There were 76,104 ED encounters during the study period. Applying all selection criteria reduced the number of required screens by 97.1% (95% confidence interval, 97.0-97.2) for HIV and 86.1% (95% confidence interval, 85.9-86.3) for HCV. CONCLUSIONS: Using the example of HIV and HCV screening, the application of eligibility metrics reduces the volume of service need to a smaller, more feasible number than estimates from ED census alone. This approach might be useful for clarifying perceived service need and guiding operational planning.

Identifying ED patients with previous abnormal HIV or hepatitis C test results who may require additional services.

OBJECTIVES: Routine emergency department (ED) HIV or HCV screening may inadvertently capture patients already diagnosed but does not specifically prioritize identification of this group. Our objective was to preliminarily estimate the volume of this distinct group in our ED population through a pilot electronic health record (EHR) build that identified all patients with indications of HIV or HCV in their EHR at time of ED presentation. METHODS: Cross-sectional study of an urban, academic ED's HIV/HCV program for previously diagnosed patients August 2017-July 2018. Prevention program staff, alerted by the EHR, reviewed records and interviewed patients to determine if confirmatory testing or linkage to care was needed. Primary outcome was total proportion of ED patients for whom the EHR generated an alert. Secondary outcome was the proportion of patients assessed by program staff who required confirmatory testing or linkage to HIV/HCV medical care. RESULTS: There were 65,374 ED encounters with 5238 (8.0%, 95% CI: 7.8%-8.2%) EHR alerts. Of these, 3741 were assessed by program staff, with 798 (21%, 95% CI: 20%-23%) requiring HIV/HCV confirmatory testing or linkage to care services, 163 (20%) for HIV, 551 (69%) for HCV, and 84 (11%) for both HIV and HCV services. CONCLUSIONS: Patients with existing indication of HIV or HCV infection in need of confirmatory testing or linkage to care were common in this ED. EDs should prioritize identifying this population, outside of routine screening, and intervene similarly regardless of whether the patient is newly or previously diagnosed.

Lessons Learned From the Development and Parameterization of a Computer Simulation Model to Evaluate Task Modification for Health Care Providers.

Computer simulation is a highly advantageous method for understanding and improving health care operations with a wide variety of possible applications. Most computer simulation studies in emergency medicine have sought to improve allocation of resources to meet demand or to assess the impact of hospital and other system policies on emergency department (ED) throughput. These models have enabled essential discoveries that can be used to improve the general structure and functioning of EDs. Theoretically, computer simulation could also be used to examine the impact of adding or modifying specific provider tasks. Doing so involves a number of unique considerations, particularly in the complex environment of acute care settings. In this paper, we describe conceptual advances and lessons learned during the design, parameterization, and validation of a computer simulation model constructed to evaluate changes in ED provider activity. We illustrate these concepts using examples from a study focused on the operational effects of HIV screening implementation in the ED. Presentation of our experience should emphasize the potential for application of computer simulation to study changes in health care provider activity and facilitate the progress of future investigators in this field.

Pilot Integration of HIV Screening and Healthcare Settings with Multi- Component Social Network and Partner Testing for HIV Detection.

BACKGROUND: Healthcare settings screen broadly for HIV. Public health settings use social network and partner testing ("Transmission Network Targeting (TNT)") to select high-risk individuals based on their contacts. HIV screening and TNT systems are not integrated, and healthcare settings have not implemented TNT. OBJECTIVE: The study aimed to evaluate pilot implementation of multi-component, multi-venue TNT in conjunction with HIV screening by a healthcare setting. METHODS: Our urban, academic health center implemented a TNT program in collaboration with the local health department for five months during 2011. High-risk or HIV positive patients of the infectious diseases clinic and emergency department HIV screening program were recruited to access social and partner networks via compensated peer-referral, testing of companions present with them, and partner notification services. Contacts became the next-generation index cases in a snowball recruitment strategy. RESULTS: The pilot TNT program yielded 485 HIV tests for 482 individuals through eight generations of recruitment with five (1.0%; 95% CI = 0.4%, 2.3%) new diagnoses. Of these, 246 (51.0%; 95% CI = 46.6%, 55.5%) reported that they had not been tested for HIV within the last 12 months and 383 (79.5%; 95% CI = 75.7%, 82.9%) had not been tested by the existing ED screening program within the last five years. CONCLUSION: TNT complements population screening by more directly targeting high-risk individuals and by expanding the population receiving testing. Information from existing healthcare services could be used to seed TNT programs, or TNT could be implemented within healthcare settings. Research evaluating multi-component, multi-venue HIV detection is necessary to maximize complementary approaches while minimizing redundancy.

The Know∗Now Project: Facilitated Serosorting in HIV-Status Sexual Partner Communication.

An intervention was conducted providing access to clinic-verified HIV test results via a secure, web-based informatics platform to facilitate sexual partner HIV-status communication. Participants (N = 28) were men who have sex with men (MSM; HIV- n = 8, HIV+ n = 8) and heterosexuals (Non-MSM, n = 12). Focus groups with same-group members explored interest in using the intervention and baseline attitudes and practices relevant to serosorting. HIV-negative participants overwhelmingly expressed interest, regardless of MSM status. Interest among HIV-positive MSM was mixed. Six month follow-up interviews (n = 16) indicated 94% of all groups accessed the website, 69% had shown documented results to a sexual partner to initiate HIV-status discussion, and 88% reported future interest in using the 24/7 web-based tool with prospective sexual partners. Implications for future interventions facilitating HIV serosorting and sexual partner communication are discussed.