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BACKGROUND & AIMS: Eosinophilic esophagitis (EoE) is caused by an immune response to specific food allergens. There are no approved therapies beyond avoidance of the allergen(s) or treatment of inflammation. Epicutaneous immunotherapy (EPIT) reduces features of eosinophilic gastrointestinal disease in mice and pigs. We performed randomized, placebo-controlled study to determine the safety and efficacy of EPIT with Viaskin milk in children with milk-induced EoE. METHODS: In a double-blind study, 20 children (4-17 years old) with milk-induced EoE were randomly assigned to groups given EPIT with Viaskin milk (n = 15) or placebo (n = 5) for 9 months during a milk-free period, followed by milk-containing diet for 2 months with EPIT. Then, subjects underwent upper endoscopy analysis, biopsies were collected, and maximum esophageal eosinophil counts were determined and was the primary endpoint. After upper endoscopy, patients were given open-label EPIT for 11 months (open-label phase). The subjects were allowed to consume milk if they had maximum values of fewer than 10 eosinophils/high-power field (eos/hpf); otherwise, they remained on a milk-free diet until the last 2 months of the open-label phase. RESULTS: In the intent to treat population, there was no significant difference between the Viaskin milk group in mean eos/hpf (50.1 ± 43.97 eos/hpf) vs the placebo group (48.20 ± 56.98 eos/hpf). However, in the per-protocol population (7 patients given Viaskin milk and 2 patients given placebo), patients given Viaskin milk patients had a significantly lower mean eos/hpf count (25.57 ± 31.19) than patients given placebo (95.00 ± 63.64) (p = .038). At the end of the open-label phase, 9 of 19 evaluable subjects had mean values of fewer than 15 eos/hpf (47% response). The number of adverse events did not differ significantly between the Viaskin milk and placebo groups; there was 1 serious adverse event in the placebo group. CONCLUSIONS: In a pilot study of pediatric patients with EoE given EPIT with Viaskin milk or placebo for 11 months, we found no significant difference between groups for the maximum eosinophil count at the end of the study. However, findings from a per-protocol analysis indicate that Viaskin milk can reduce eos/hpf. At study completion, 47% of patients who continued open-label Viaskin milk for an additional 11 months had mean values of fewer than 15 eos/hpf. ClinicalTrials.gov no: NCT02579876.
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Esofagite Eosinofílica , Alérgenos , Animais , Criança , Esofagite Eosinofílica/tratamento farmacológico , Eosinófilos , Humanos , Imunoterapia/efeitos adversos , Camundongos , Leite , Projetos Piloto , Suínos , Resultado do TratamentoRESUMO
Hepatitis C virus (HCV) is highly prevalent in incarcerated populations. The high cost of HCV therapy places a major burden on correctional system healthcare budgets, but the burden of untreated HCV is not known. We investigated the economic impact of HCV through comparison of length of stay (LOS), frequency of 30-day readmission, and costs of hospitalizations in inmates with and without HCV using a 2004-2014 administrative claims database. Inmates with HCV had longer LOS, higher frequency of 30-day readmission, and increased cost of hospitalizations. Costs were higher in inmates with HCV even without advanced liver disease and in inmates with HIV/HCV compared to HCV alone. We conclude that although HCV treatment may not avert all of the observed increases in hospitalization, modest reductions in hospital utilization with HCV cure could help offset treatment costs. Policy discussions on HCV treatment in corrections should be informed by the costs of untreated HCV infection.
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Custos de Cuidados de Saúde/estatística & dados numéricos , Hepatite C/economia , Hepatite C/terapia , Hospitalização/economia , Tempo de Internação/estatística & dados numéricos , Readmissão do Paciente/economia , Prisioneiros/estatística & dados numéricos , Prisões/economia , Adulto , Feminino , Hospitalização/estatística & dados numéricos , Humanos , Masculino , Massachusetts , Pessoa de Meia-Idade , Readmissão do Paciente/estatística & dados numéricos , Prisões/estatística & dados numéricosRESUMO
BACKGROUND: The United States has a growing opioid epidemic impacting all aspects of health care including orthopaedic surgery. Septic arthritis of the knee is a condition commonly encountered by orthopaedic surgeons related to opioid and injection drug use (IDU). Changes in the frequency of hospitalizations for IDU-related septic arthritis and differences in septic arthritis patient outcomes according to IDU status in the setting of the burgeoning opioid epidemic are unknown. QUESTIONS/PURPOSES: (1) What proportion of patients with septic arthritis of the knee use injection drugs? (2) Are there any differences in complications, reoperations, length of stay, and leaving against medical advice among patients with septic arthritis of the knee with and without IDU? (3) What are the age and racial trends in IDU-related septic arthritis of the knee from 2000 to 2013? METHODS: The Healthcare Cost and Utilization Project, Nationwide Inpatient Sample database of years 2000 to 2013 was utilized for patients between ages 15 and 64 years with a principal discharge diagnosis of native septic arthritis of the lower leg, the vast majority of which represents the knee. The Nationwide Inpatient Sample is the largest publicly available healthcare database in the United States that can show nationally representative clinical trends and outcomes. Septic arthritis was classified as related or unrelated to IDU based on previously published algorithms using billing codes. Patients with IDU-related septic arthritis were more likely to be black or Hispanic, younger, and use Medicare, Medicaid, or self-payment as their primary payment method. The yearly proportion of patients with septic arthritis who used injection drugs was determined. Hospitalization outcomes including length of stay, leaving against medical advice, number of procedures, and mortality rates were compared after adjusting for age, gender, and race in multivariable regression analyses. The yearly change in proportion of IDU-related septic arthritis in each age, race, and gender group was compared over the study period. RESULTS: The proportion of patients with IDU-related septic arthritis increased from 5% in 2000 to 11% in 2013. After adjusting for age, gender, and race, patients with IDU-related septic arthritis were more likely to die during hospitalization (adjusted odds ratio [AOR], 2.86; 95% confidence interval [CI], 1.51-5.39; p < 0.001) and undergo repeat arthroscopic (AOR, 1.24; 95% CI, 1.06-1.45; p = 0.007) or open irrigation and débridement (AOR, 1.68; 95% CI, 1.28-2.19; p < 0.001). Patients with IDU-related septic arthritis were more likely to leave against medical advice (AOR, 7.13; 95% CI, 5.56-9.15; p < 0.001) and also had an additional 5 days in length of stay (95% CI, 4.1-5.5; p < 0.001) on average compared with patients with septic arthritis unrelated to IDU. There was an increasing proportion of patients with IDU-related septic arthritis who were aged 15 to 34 years and 55 to 64 years from 2000 to 2013. CONCLUSIONS: IDU is increasingly the cause of septic knee admissions and is associated with higher rates of mortality, reoperations, resource utilization, and leaving against medical advice. Orthopaedic surgeons must adequately screen for IDU among patients with septic arthritis and monitor them closely for reoperation with a low threshold to reaspirate a knee in the postoperative period. Future studies should determine the current use and potential benefits of a multidisciplinary approach, including addiction specialists, to aid in the management of the increasing number of these patients. LEVEL OF EVIDENCE: Level III, therapeutic study.
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Artrite Infecciosa/mortalidade , Artrite Infecciosa/cirurgia , Desbridamento/estatística & dados numéricos , Reoperação/estatística & dados numéricos , Abuso de Substâncias por Via Intravenosa/mortalidade , Adolescente , Adulto , Negro ou Afro-Americano/estatística & dados numéricos , Artrite Infecciosa/etiologia , Estudos Transversais , Feminino , Hispânico ou Latino/estatística & dados numéricos , Hospitalização/estatística & dados numéricos , Humanos , Pacientes Internados/estatística & dados numéricos , Articulação do Joelho/cirurgia , Masculino , Pessoa de Meia-Idade , Abuso de Substâncias por Via Intravenosa/complicações , Estados Unidos , População Branca/estatística & dados numéricos , Adulto JovemRESUMO
Robust data on hepatitis C virus (HCV) population prevalence are essential to inform national HCV services. In 2016, we undertook a survey to estimate HCV prevalence among the adult population in Ireland. We used anonymised residual sera available at the National Virus Reference Laboratory. We selected a random sample comprising persons ≥ 18 years with probability proportional to the general population age-sex distribution. Anti-HCV and HCV Ag were determined using the Architect anti-HCV and HCV Ag assays. Fifty-three of 3,795 specimens were seropositive (age-sex-area weighted seroprevalence 0.98% (95% confidence interval (CI): 0.73-1.3%)). Thirty-three specimens were HCV-antigen and antibody-positive (age-sex-area weighted prevalence of chronic infection 0.57% (95% CI: 0.40-0.81%)). The prevalence of chronic infection was higher in men (0.91%; 95% CI: 0.61-1.4%), in specimens from the east of the country (1.4%; 95%CI: 0.99-2.0%), and among persons aged 30-39 years and 40-49 years (1.1% (95% CI: 0.59-2.0%) and 1.1% (95% CI: 0.64-1.9%) respectively). Ireland ranks at the lower end of the spectrum of prevalence of chronic HCV infection internationally. Men born between 1965 and 1984 from the east of the country have the highest rate of chronic HCV infection.
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Hepacivirus/imunologia , Anticorpos Anti-Hepatite C/análise , Hepatite C/epidemiologia , Adolescente , Adulto , Distribuição por Idade , Idoso , Idoso de 80 Anos ou mais , Feminino , Hepatite C/sangue , Humanos , Irlanda/epidemiologia , Masculino , Pessoa de Meia-Idade , Vigilância da População , Prevalência , Fatores de Risco , Estudos Soroepidemiológicos , Distribuição por SexoRESUMO
OBJECTIVES: Inpatient healthcare delivery to people who use drugs is an opportunity to provide acute medical stabilization and offer treatment for underlying substance use disorder (SUD). The process of delivering quality healthcare to people with SUD can present challenges. METHODS: We convened a group of stakeholders to discuss challenges and opportunities for improving healthcare safety and employee satisfaction when providing inpatient care to people with SUD. RESULTS: We developed, implemented, and evaluated a "Pain and Addiction Agreement" tool, a document to guide discussions between providers and patients about expectations and policies for inpatient care. CONCLUSIONS: In this article, we share our experience of working closely with stakeholders. We hope that our project can serve as a blueprint motivating other centers to pursue quality improvement initiatives to improve healthcare for people with SUD and support the people who take care of them in the hospital.
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Pacientes Internados , Transtornos Relacionados ao Uso de Substâncias , Atenção à Saúde , Hospitalização , Hospitais , Humanos , Transtornos Relacionados ao Uso de Substâncias/terapiaRESUMO
BACKGROUND: Despite national guidelines promoting hepatitis C virus (HCV) testing in prisons, there is substantial heterogeneity on the implementation of HCV testing in jails. We sought to better understand barriers and opportunities for HCV testing by interviewing a broad group of stakeholders involved in HCV testing and treatment policies and procedures in Massachusetts jails. METHODS: We conducted semi-structured interviews with people incarcerated in Middlesex County Jail (North Billerica, MA), clinicians working in jail and community settings, corrections administrators, and representatives from public health, government, and industry between November 2018-April 2019. RESULTS: 51/120 (42%) of people agreed to be interviewed including 21 incarcerated men (mean age 32 [IQR 25, 39], 60% non-White). Themes that emerged from these interviews included gaps in knowledge about HCV testing and treatment opportunities in jail, the impact of captivity and transience, and interest in improving linkage to HCV care after release. Many stakeholders discussed stigma around HCV infection as a factor in reluctance to provide HCV testing or treatment in the jail setting. Some stakeholders expressed that stigma often led decisionmakers to estimate a lower "worth" of incarcerated individuals living with HCV and therefore to decide against paying for HCV testing.". CONCLUSION: All stakeholders agreed that HCV in the jail setting is a public health issue that needs to be addressed. Exploring stakeholders' many ideas about how HCV testing and treatment can be approached is the first step in developing feasible and acceptable strategies.
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Hepatite C/diagnóstico , Prisões Locais/estatística & dados numéricos , Prisioneiros/psicologia , Prisioneiros/estatística & dados numéricos , Prisões/estatística & dados numéricos , Adulto , Técnicas de Laboratório Clínico/estatística & dados numéricos , Feminino , Hepatite C/virologia , Humanos , Masculino , Massachusetts , Saúde Pública/estatística & dados numéricos , Estigma Social , Inquéritos e QuestionáriosRESUMO
PURPOSE: Credible evidence-based diet and nutrition advice is essential for patients with cancer. This study aimed to explore what advice patients with cancer obtained before a formal dietetic visit. METHODS: A multicenter, observational study was conducted in seven hospital-based oncology services. Consecutive patients were recruited at first dietetic assessment. In addition to routine dietetic assessment, participants completed a four-item questionnaire describing diet and nutrition advice obtained since diagnosis. RESULTS: Seventy-seven patients participated. More than 80% had multiple nutrition-impact symptoms. In total, 53 (69%) obtained advice from professional and nonprofessional sources before dietetic visit. Family and friends were the most common sources of advice. More than one third got advice from (nondietetic) healthcare professionals. Most advice related to "foods to include" (61%) and "foods to avoid" (54%) in the diet. Many of the "foods to avoid" were important sources of micro- and macronutrients. Advice about dietary supplements (31%) and specific diets (28%) was common, rarely evidence-based, and frequently contradictory. Participants found it difficult to discern what advice was trustworthy and reliable. Despite this, most followed the advice. CONCLUSION: The majority of patients received diet and nutrition advice before first dietetic visit. Most of this came from nonprofessional sources. Any advice from nondietetic healthcare professionals was inconsistent or vague. This was mainly related to the avoidance and/or inclusion of particular foods and was often contradictory. Nevertheless, patients usually followed such advice fully. To help manage their frequent nutrition-impact symptoms and resolve the contradictory advice they had received, many expressed the need for earlier professional dietetic consultation.
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Dietética , Neoplasias , Dieta , Suplementos Nutricionais , Humanos , Estado NutricionalRESUMO
People with opioid use disorder (OUD) have worse hospital outcomes and higher healthcare costs. There are rising reports of people with OUD also using other classes of drugs, however patterns of substance use have not been evaluated for differential effects on hospital outcomes. We performed a data-analysis of the Healthcare Utilization Project's National Readmissions Database, examining the effects of patterns of substance use, age, gender, and diagnosis on the outcomes of Against Medical Advice (AMA) discharges and 30-day readmissions. About one-third of the patients with OUD who were admitted to the hospital had at least one additional substance use disorder (SUD). Thirteen percent of persons with OUD were discharged AMA, and 12% were readmitted to the hospital within 30 days of discharge. Compared to people with OUD alone, people who used stimulants had increased odds of AMA discharge (aOR 1.83 (CI 1.73, 1.96)) and 30-day readmission (aOR 1.30 (95% CI 1.23, 1.37)). Multiple concomitant substance use disorders were associated with increased odds of AMA discharge and 30-day readmission. Conclusions: People with OUD have high rates of both AMA discharges and 30 day-readmissions, and there is a layered effect of increasing co-occurring SUDs leading to worse hospitalization outcomes. The heterogeneity of drug use patterns needs to be considered when developing strategies to improve health care outcomes for people with substance use disorder.
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Hospitalização , Preparações Farmacêuticas , Humanos , Alta do Paciente , Readmissão do Paciente , Estudos RetrospectivosRESUMO
BACKGROUND: Fueled by the burgeoning opioid epidemic, valve surgeries for substance use disorder-related infective endocarditis (SUD-IE) are increasing. The impact of substance use disorder on postvalve replacement morbidity needs further investigation. METHODS: We queried The Society of Thoracic Surgeons Adult Cardiac Surgery Database for all valve surgeries for infective endocarditis at Tufts Medical Center (2002-2016) and collected demographic and disease-related data, including timing of mortality subclassified as short-term (<6 months including operative), midterm (6 months to 5 years), and extended-term (>5 years). Patients with documentation of illicit drug use before the operation were considered to have SUD-IE. Deaths were confirmed through review of medical record and matching with the Massachusetts Vital Statistics Database. We performed univariate and multivariate proportional hazard regressions examining the impact of substance use disorder mortality in people who received a valve replacement. RESULTS: In the cohort of 228 patients, 80 (35%) had SUD-IE. Eight-six people (38%) died, and overall mortality was higher in people with SUD-IE compared with non-SUD-IE (48% vs 32%, P = .025). SUD-IE was associated with a higher risk of overall mortality (adjusted hazard ratio, 2.41; 95% confidence interval, 1.38-4.20; P = .002). Although the difference between short-term or extended-term mortality was not significant, SUD-IE was associated with increased frequency of midterm mortality (53% vs 31%, P = .003). CONCLUSIONS: Our data reflect high rates of postvalve surgery morbidity and mortality in people with SUD-IE at a tertiary care center. The midterm postoperative period is a vulnerable period for people with SUD-IE worthy of further investigation.
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Procedimentos Cirúrgicos Cardíacos/métodos , Endocardite/cirurgia , Doenças das Valvas Cardíacas/cirurgia , Valvas Cardíacas/cirurgia , Complicações Pós-Operatórias/epidemiologia , Transtornos Relacionados ao Uso de Substâncias/complicações , Adulto , Idoso , Ecocardiografia Transesofagiana , Endocardite/complicações , Endocardite/epidemiologia , Feminino , Doenças das Valvas Cardíacas/epidemiologia , Doenças das Valvas Cardíacas/etiologia , Valvas Cardíacas/diagnóstico por imagem , Humanos , Masculino , Massachusetts/epidemiologia , Pessoa de Meia-Idade , Morbidade/tendências , Estudos Retrospectivos , Taxa de Sobrevida/tendências , Resultado do TratamentoRESUMO
BACKGROUND: In the midst of an opioid epidemic, health care workers are encountering an increasing number of patients who have opioid use disorder in addition to complex social, behavioral and medical issues. Of all the clinicians in the hospital, nurses spend the most time with hospitalized patients who have opioid use disorder, yet there has been little research exploring their experiences in caring for this population. The objective of this study was to assess the attitudes, perceptions, and training needs of nurses in the inpatient setting when caring for patients who have opioid use disorder. METHODS: One-on-one in-depth interviews were conducted with nurses working at a large academic medical center in Boston, MA, using a semi-structured interview guide. Nurses were recruited via email notifications and subsequent snowball sampling. Interviews were recorded, transcribed and analyzed using a grounded theory approach. RESULTS: Data from in-depth interviews with 22 nurses were grouped into six themes: (1) stigma, (2) assessing & treating pain, (3) feelings of burn out, (4) communication between providers, (5) safety & security, and (6) opportunities for change. These themes were organized within four ecological levels of the Socio-Ecological Model: I) societal context, II) hospital environment, III) interpersonal interactions, and IV) individual factors. Nurses were cognizant of the struggles that patients who have opioid use disorder confront during hospitalization such as pain, withdrawal and stigma, and elaborated on how these challenges translate to professional and emotional strain among nurses. Nurses offered recommendations by which the hospital could streamline care for this population, including expanded role support for nurses and more structured policies regarding care for patients who present with a comorbid opioid use disorder. CONCLUSION: Our results highlight the need for the development of programs targeting both organizational culture and the inpatient nurse quality of life to ultimately enhance quality of care for patients who present with opioid use disorder.
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Pacientes Internados , Enfermeiras e Enfermeiros/psicologia , Transtornos Relacionados ao Uso de Opioides/epidemiologia , Transtornos Relacionados ao Uso de Opioides/terapia , Adolescente , Adulto , Idoso , Comorbidade , Feminino , Conhecimentos, Atitudes e Prática em Saúde , Humanos , Masculino , Pessoa de Meia-Idade , Percepção , Estigma Social , Adulto JovemRESUMO
BACKGROUND: In recent years, more than half of new HIV infections in the United States occur among African Americans in the Southeastern United States. Spatial epidemiological analyses can inform public health responses in the Deep South by identifying HIV hotspots and community-level factors associated with clustering. OBJECTIVE: The goal of this study was to identify and characterize HIV clusters in Mississippi through analysis of state-level HIV surveillance data. METHODS: We used a combination of spatial epidemiology and statistical modeling to identify and characterize HIV hotspots in Mississippi census tracts (n=658) from 2008 to 2014. We conducted spatial analyses of all HIV infections, infections among men who have sex with men (MSM), and infections among African Americans. Multivariable logistic regression analyses identified community-level sociodemographic factors associated with HIV hotspots considering all cases. RESULTS: There were HIV hotspots for the entire population, MSM, and African American MSM identified in the Mississippi Delta region, Southern Mississippi, and in greater Jackson, including surrounding rural counties (P<.05). In multivariable models for all HIV cases, HIV hotspots were significantly more likely to include urban census tracts (adjusted odds ratio [AOR] 2.01, 95% CI 1.20-3.37) and census tracts that had a higher proportion of African Americans (AOR 3.85, 95% CI 2.23-6.65). The HIV hotspots were less likely to include census tracts with residents who had less than a high school education (AOR 0.95, 95% CI 0.92-0.98), census tracts with residents belonging to two or more racial/ethnic groups (AOR 0.46, 95% CI 0.30-0.70), and census tracts that had a higher percentage of the population living below the poverty level (AOR 0.51, 95% CI 0.28-0.92). CONCLUSIONS: We used spatial epidemiology and statistical modeling to identify and characterize HIV hotspots for the general population, MSM, and African Americans. HIV clusters concentrated in Jackson and the Mississippi Delta. African American race and urban location were positively associated with clusters, whereas having less than a high school education and having a higher percentage of the population living below the poverty level were negatively associated with clusters. Spatial epidemiological analyses can inform implementation science and public health response strategies, including improved HIV testing, targeted prevention and risk reduction education, and tailored preexposure prophylaxis to address HIV disparities in the South.
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BACKGROUND: Abscesses commonly occur among people who inject drugs (PWID). However, whether the risks are comparable between males and females, and the impact of sex work on abscess risk is unclear. The goal of this study was to examine the contemporary associations of gender and sex work with the risk of abscesses in PWID. METHODS: Combining data from two cross-sectional studies conducted in the Greater Boston Area with people at risk for HIV and hepatitis C virus (HCV), we used the following inclusion criteria: age 18-45â¯years and report of illicit or non-prescription drug injection within the 30â¯days prior to the survey. Information on demographics, injection-mediated risks, and sexual behaviors was collected using Audio Computer-Assisted Self-Interview Software. Multivariable logistic regressions were used to model associations. RESULTS: The study sample included 298 people including 30% were female. Females were more likely than men to report sex work (28% vs. 16%, pâ¯=â¯.012) and abscess during their lifetime (55% vs. 37% pâ¯=â¯.004). Among the females, engaging in sex work increased by >5-fold the odds of reporting abscesses [Adjusted odds ratio 5.42; 95% CI: 1.27, 23.10]. There was no association between sex work and abscesses among men. DISCUSSION: We found a female-specific association between sex work, injection drug use, and abscesses among PWID. Although the cross-sectional designs precluded causal inferences, longitudinal studies could enhance understanding of gender-associated risks for abscesses and inform the development of harm reduction interventions.
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Abscesso/etiologia , Redução do Dano , Trabalho Sexual , Abuso de Substâncias por Via Intravenosa/complicações , Adolescente , Adulto , Boston , Estudos Transversais , Feminino , Infecções por HIV/complicações , Hepatite C/complicações , Humanos , Estudos Longitudinais , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Assunção de Riscos , Adulto JovemRESUMO
BACKGROUND: Cerebrospinal fluid (CSF) viral escape is an increasingly recognized clinical event among HIV-1-infected adults. We analyzed longitudinal data and drug-resistance mutations to characterize profiles of HIV-1-infected patients on antiretroviral therapy with discordant CSF and plasma HIV-1 RNA levels. METHODS: Forty-one cases of CSF escape defined as detectable CSF HIV-1 RNA when plasma levels were undetectable, or HIV-1 RNA >0.5-log higher in CSF than plasma were identified from Boston Hospitals and National NeuroAIDS Tissue Consortium (NNTC) from 2005 to 2016. RESULTS: Estimated prevalence of CSF escape in Boston and NNTC cohorts was 6.0% and 6.8%, respectively; median age was 50, duration of HIV-1 infection 17 years, CD4 count 329 cells/mm and CD4 nadir 21 cells/mm. Neurological symptoms were present in 30 cases; 4 had repeat episodes of CSF escape. Cases were classified into subtypes based plasma HIV-1 RNA levels in the preceding 24 months: high-level viremia (1000 copies/mL), low-level viremia (LLV: 51-999 copies/mL), and plasma suppression with CSF blip or escape (CSF RNA <200 or ≥200 copies/mL). High-level viremia cases reported more substance abuse, whereas LLV or plasma suppression cases were more neurosymptomatic (81% vs. 53%); 75% of repeat CSF escape cases were classified LLV. M184V/I mutations were identified in 74% of CSF samples when plasma levels were ≤50 copies per milliliter. CONCLUSIONS: Characteristics frequently observed in CSF escape include HIV-1 infection >15 years, previous LLV, and M184V/I mutations in CSF. Classification based on preceding plasma HIV RNA levels provides a useful conceptual framework to identify causal factors and test therapeutics.