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* From the Rehabilitation Outcomes Research Center (Dr. Uphold), North Florida/South Georgia Veterans Health System, Gainesville, FL; Department of Preventive Medicine (Dr. Deloria-Knoll), Department of Medicine (Dr. Chmiel), Division of Infectious Diseases (Dr. Palella), Feinberg School of Medicine, Northwestern University, Chicago; Stricht School of Medicine-Loyola University, Maywood, IL, and Midwest Center for Health Services Research and Policy Research (Dr. Parada), Hines VA Hospital, Hines, IL; and VA Chicago Health Care System-Lakeside Division (Dr. Bennett and Ms. Phan), Chicago, IL.
Correspondence to: Constance R. Uphold, PhD, ARNP, RN, North Florida/South Georgia Veterans Health System, Research Department, Stop 151, 1601 SW Archer Rd, Gainesville, FL 32608-1197; e-mail: Connie.Uphold{at}med.va.gov
| Abstract |
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Setting/patients: The sample consisted of 1,231 patients with HIV infection who received care for Pneumocystis carinii pneumonia (PCP) and 750 patients with HIV infection who received care for community-acquired pneumonia (CAP) during the years 1995 to 1997.
Measurement: We conducted a retrospective medical record review and evaluated patient and hospital characteristics, HIV-related processes of care (timely use of anti-PCP medications, adjunctive corticosteroids), nonHIV-related processes of care (timely use of CAP treatment medications, diagnostic testing, ICU utilization, rates of endotracheal ventilation, placement on respiratory isolation), length of inpatient hospital stay, and inpatient mortality.
Results: Rates of timely use of antibiotics and adjunctive corticosteroids for treating PCP were high and improved dramatically from the prior decade. However, compliance with consensus guidelines that recommend < 8 h as the optimal time window for initiation of antibiotics to treat CAP was lower. For both PCP and CAP, variations in processes of care and lengths of in-hospital stays, but not mortality rates, were noted at VA, public, private not-for-profit hospitals, and for-profit hospitals.
Conclusions: This study provides the first overview of HIV-related pneumonia care in the early highly active antiretroviral therapy era, and contrasts current findings with those of a similarly conducted study from a decade earlier. Quality of care for patients with PCP improved, but further efforts are needed to facilitate the appropriate management of CAP. In the third decade of the epidemic, it will be important to monitor whether variations in processes of care for various HIV-related clinical diagnoses among different types of hospitals persist.
Key Words: community-acquired pneumonia HIV Pneumocystis cariini pneumonia quality of care
| Introduction |
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Despite these changes, inpatient care costs continued to account for the largest component of HIV-related medical expenditures during these years.4 Data on variations in inpatient HIV-related pneumonia care for persons in VA, public, for-profit private, and not-for-profit private hospitals in the second decade of AIDS have yet to be reported.
In this study, we evaluated whether differences in processes and outcomes of care for patients with HIV infection and PCP persisted into the second decade of the HIV epidemic. In order to broaden as well as temporally extend our previous findings, we added two components to our study. First, we compared VA hospitals with public hospitals and two types of private hospitals: for-profit and not-for-profit. Second, we evaluated variations in processes and outcomes of care in patients with HIV infection with community-acquired pneumonia (CAP). This provided additional information and increased the generalizability of our findings, as the spectrum of HIV-related pneumonia has changed since the advent of HAART. Although PCP remains an opportunistic infection of concern and an important potential cause of morbidity and hospitalizations of patients with HIV,5 the incidence of CAP is now greater than that of PCP.6 7 8 The purpose of this study is to provide a systematic view of how HIV-related pneumonia care has evolved over the last decade.
| Materials and Methods |
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Data Acquisition and Quality
Registered nurses with experience in both HIV treatment and utilization review were trained to abstract medical records. Two physicians trained in quality assurance for the project maintained data quality by overreading medical chart abstraction forms. The physician overreaders categorized < 1% of entries as possibly inaccurate. Data abstracted from medical charts included the following: patient sociodemographics; insurance status; HIV-related and nonHIV-related comorbid conditions; cigarette, alcohol and drug use history; preadmission use of antiretroviral and opportunistic infection prophylactic medications; CD4+ cell counts and HIV viral load (HIV-1 RNA) levels; initial vital signs; arterial blood gas measurements and laboratory data; treatment medications received; principal and secondary diagnostic and procedure codes; LOS; and discharge status.
Study Variables
Hospital Characteristics:
Hospitals were characterized according to ownership (public, not-for-profit private, for-profit private, and VA) as documented in the American Hospital Association guide.11
Patients with HIV infection received care for PCP in 3 public hospitals, 19 not-for-profit private hospitals, 7 for-profit private hospitals, and 5 VA hospitals. Patients received care for CAP in 3 public hospitals, 19 not-for-profit private hospitals, 3 for-profit private hospitals, and 5 VA hospitals.
Patient Characteristics: Patients were characterized by age, gender, race, employment, preadmission place of residence, HIV-acquisition risk factors, insurance status, smoking status, history of pulmonary diseases, PCP prophylaxis, and antiretroviral drug therapy before hospital admission. Age at hospital admission was derived using date of birth or was abstracted from the medical record. Race was recorded as white, African American, and Hispanic/other. Employment status was categorized as full/part-time, unemployed, retired, or disabled. Information collected on preadmission place of residence noted whether the patient was homeless, living in a hotel, or in prison. HIV-acquisition risk factors were categorized according to information provided by the medical records and included the following: men who have sex with men, patients reporting injection drug use, patients reporting noninjection drug use, and patients with unknown or unreported risk factors. Heterosexual acquisition of HIV infection without recreational drug use was infrequently noted. Insurance status was recorded as private insurance (including fee-for-service and preferred provider organizations), public insurance (including Medicaid, Medicare, and government-sponsored veterans insurance), and self-pay/no insurance. Smoking status was categorized on the basis of whether the patient was or was not a current smoker. A patient having had any of the following diagnoses before hospital admission was considered to have history of pulmonary disease: chronic pulmonary disease, emphysema, asthma, chronic bronchitis, pneumothorax, lung resection, PCP pneumonia, and non-PCP pneumonia. PCP prophylaxis and antiretroviral medication use prior to hospital admission were categorized as yes or no.
Severity of Illness:
We have previously developed etiology-specific severity of illness stages that have been validated for both PCP and CAP. For PCP, severity of illness at hospital admission was based on wasting (operationally defined as documentation of weight loss > 20% and/or wasting syndrome), alveolar-arterial oxygen gradient (P[A-a]O2), serum albumin levels, and defined as follows: stage 1, no evidence of wasting, P(A-a)O2
53 mm Hg (mortality rate, 3.7%); stage 2, wasting, P(A-a)O2
53 mm Hg (mortality rate, 8.5%); stage 3, no evidence of wasting, P(A-a)O2 > 53 mm Hg (mortality rate, 16.1%); stage 4, wasting, P(A-a)O2 > 53 mm Hg, and a serum albumin level > 2.55 g/dL (mortality rate, 23.3%); and stage 5, wasting, P(A-a)O2 > 53 mm Hg, and a serum albumin
2.55 g/dL (mortality rate, 49.1%). A detailed summary appears in Arozullah et al.9
The CAP severity staging system is based on neurologic symptoms, the respiratory rate, and serum creatinine level, and is defined as follows: stage 1, no evidence of neurologic symptoms and respiratory rate < 25 breaths/min (mortality rate, 2.3%); stage 2, no evidence of neurologic symptoms, respiratory rate
25 breaths/min, and serum creatinine level
1.2 mg/dL (mortality rate, 5.8%); stage 3, evidence of neurologic symptoms and respiratory rate < 25 breaths/min (mortality rate, 12.9%); stage 4, no evidence of neurologic symptoms, respiratory rate
25 breaths/min, and serum creatinine level > 1.2 mg/dL (mortality rate, 22.0%); and stage 5, evidence of neurologic symptom and respiratory rate
25 breaths/min (mortality rate, 40.5%). The staging system has been shown to predict the hospital discharge status (alive vs dead) correctly for 85.2% of the patients in the CAP data set.12
For CAP, we also calculated a Fine score for each patient, which is based on demographic factors, comorbid illnesses, physical examination findings, and laboratory findings.13
HIV-Related and NonHIV-Related Process of Care and Outcomes: The timing and intensity of care were evaluated and based on the treatment and outcome of the pneumonia episode, as outlined by physician consultants to the project. For HIV-related processes of care, we examined the timely use of anti-PCP medications (within 2 days of hospital admission) and adjunctive corticosteroids (within 3 days of initiation of anti-PCP medications). For nonHIV-related care process measures, we examined the timely use of CAP treatment medications within 24 h of hospital admission and at anytime during hospital stay, ICU utilization, rates of endotracheal intubation for ventilatory support, and placement on respiratory isolation while ruling out pulmonary infection with Mycobacterium tuberculosis. We examined the timing and intensity of diagnostic testing: cytologic confirmation (PCP only), bronchoscopic evaluation within 2 days of hospital admission, and at any time during the hospital stay, and whether chest radiographs were obtained. In patients with either CAP or PCP, we examined the use of do-not-resuscitate (DNR) orders and rates of patient discharge against medical advice (AMA).
We evaluated mortality rates using discharge status (alive or dead). LOS was measured in days and calculated only for patients who were alive at discharge.
Statistical Analysis
Hospital and patient characteristic data from the PCP and CAP studies are shown combined when both frequency of occurrence and association with the four hospital ownership categories were similar, and separately for these two diagnoses otherwise. Pairwise comparisons of hospital and patient characteristics evaluating VA hospitals vs the three other hospital ownership types, as well as heterogeneity among the four hospital types, were undertaken using
2 or Fisher exact tests for comparisons of proportions, t tests and analysis of variance for comparisons of means, and Wilcoxon rank-sum or Kruskal-Wallis tests for comparisons of medians. For analyses of combined data from the CAP and PCP studies, heterogeneity among the four hospital types was adjusted for using a Cochran-Mantel-Haenszel test for categorical variables or analysis of variance for continuous variables. However, these results are not presented because they did not differ meaningfully from unadjusted comparisons. In addition, variations in ICU use and in-hospital mortality rates (as independent variables) were evaluated using logistic regression models. For evaluating relationships between hospital ownership types and length of in-hospital stay, a multiple regression model was constructed. The basic multivariate models adjusted for age, gender, race or ethnicity, risk group, city, smoking status, severity stage of PCP and CAP, discharged AMA, history of pulmonary disease, prior HIV and AIDS diagnoses, and PCP prophylaxis and antiretroviral therapy prior to hospital admission. These analyses excluded patients with DNR orders. The SAS statistical package (version 8.0; SAS Institute; Cary, NC) was used for all analyses. Significance was defined as p < 0.05 based on two-sided tests.
| Results |
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Rates of respiratory isolation while ruling out tuberculosis infection were higher for patients with HIV infection and pneumonia who received care at public hospitals (83.3%) and VA hospitals (69.7%) vs those who received care at not-for-profit hospitals (48.5%) or for-profit private hospitals (12.5%) [p < 0.001]. Patients with PCP, but not CAP, were more likely to be discharged AMA at VA hospitals (11.8%) than at public hospitals (6.5%), not-for-profit hospitals (2.5%), and for-profit hospitals (2.5%) [p < 0.001].
The timeliness of PCP-specific treatment initiation (within 2 days of hospital admission) and adjunctive corticosteroids (within 3 days of initiation of anti-PCP medications) were similar, while the timeliness of CAP-specific treatment initiation (within 24 h of hospital admission) was poorer for patients at not-for-profit hospitals (58.5% vs rates of 66.7% to 77.0% for patients who received care at the other three types of hospitals) [p < 0.001].
Patterns of resource utilization differed. Patients at VA hospitals had the longest inpatient stays for PCP (median of 10 days at VA hospitals, 7 days at public hospitals, 8 days at not-for-profit hospitals, and 6 days at for-profit hospitals [p < 0.001]) and for CAP (median of 7 days for patients at VA hospitals, 5 days at public hospitals, 6 days at not-for-profit hospitals, and 5 days at for-profit hospitals [p < 0.001]). These differences persisted after adjustments for clinical covariates. Rates of ICU use were highest for patients with PCP who received care at VA hospitals (22.4% for patients at VA hospitals, 12.6% for patients at public hospitals, 19.3% for patients at not-for-profit hospitals, and 18.6% for patients at for-profit hospitals [p = 0.04]), but after adjusting for severity of illness at hospital admission, the ICU use rates were similar among the four types of hospitals (data not shown). Patients with CAP had similar rates of ICU use across hospital types in both univariate analyses and after adjustment for differences in severity of illness at hospital admission. After adjustment for differences in severity of illness at hospital admission, inpatient mortality rates were similar for patients with CAP and PCP who received care at each of the different types of hospitals (data not shown).
| Discussion |
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Only one prior study1 has addressed variations in patterns of care and outcomes for patients with HIV infection and PCP at VA vs public and private hospitals. That study1 included 2,174 hospitalized patients with PCP who received care during the years 1987 to 1990, while the current study includes 1,231 hospitalized patients with PCP who received care during the years 1995 to 1997. Taken together, the studies identify large temporal changes in PCP care. Lengths of hospitalization were twice as great in the first decade vs the second decade at VA, public, and private hospitals (ranging, 12 to 20 days vs 6 to 10 days in the more recent era). The intensity of diagnostic evaluation diminished, with bronchoscopy rates ranging from 44 to 66% in the first decade vs 20 to 40% in the second decade, and PCP confirmation rates ranging from 48 to 66% in the first decade vs 23 to 50% in the second decade at private, public, and VA hospitals. Multiple studies15 16 17 from the 1980s and early 1990s indicated that empiric treatment for PCP was both clinically effective as well as cost-effective. In contrast, however, the overall treatment of PCP decidedly improved: rates of delayed initiation of PCP medication were twice as great in the first decade; rates of use of adjunctive corticosteroids were < 5% for severely ill patients with PCP in the first decade vs between 73% and 83% in the more recent era; and inpatient death rates were almost three times as great in the earlier era (18%, 20%, and 24% in 1987 to 1990 vs 11%, 11%, and 8% in 1995 to 1997 at private, public, and VA hospitals, respectively). It is reassuring that following the publication of an 1990 National Institutes of Health consensus statement18 recommending adjunctive corticosteroids for severe cases of PCP, more than three fourths of those with severe cases of PCP received this treatment during the years 1995 to 1997.
Our study provides the first data on patterns of care for large numbers of patients with HIV infection and CAP. At the different types of hospital systems, the intensity of CAP care was about 1.5-fold to twofold less than that associated with PCP care with respect to rates of bronchoscopy, ICU use, and early initiation of appropriate antibiotics, while the median duration of hospitalization was approximately two thirds as long. Inpatient mortality for CAP ranged from 6 to 12%, similar to the rates reported in an observational study19 of HIV-associated CAP. Of note, approximately one third of the patients with CAP did not receive antibiotics within 24 h of hospital admission, suggesting that it will be important to develop strategies that facilitate more timely administration of appropriate antibiotics for CAP. Such measures would be in keeping with consensus guidelines for managing CAP,20 21 and with quality improvement projects22 23 recommended by the Joint Commission for Accreditation of Healthcare Organizations that targets < 8 h as the optimal time window for initiation of antibiotic therapy for CAP after clinical diagnosis.
We also identified large variations in HIV-related pneumonia care according to hospital system. In particular, patients with HIV infection who received pneumonia care in public and VA hospitals were less likely to undergo diagnostic bronchoscopy than those who received care in private hospitals, a finding similar to that which we reported previously for the years 1987 to 1990.1 Because VA and public hospitals rely on tax revenues and government allocations, they may have less flexibility in their budgets and may be more limited in the use of diagnostic tests than private hospitals. In contrast, median durations of hospitalization were longest in the VA system. Among veterans with HIV infection, as well as those who have other medical illnesses, complex medical and social situations are common, and these can contribute to inefficiencies in the coordination of posthospital care in the outpatient setting and often result in extended hospitalizations.24 25 26 Mortality rates for PCP and CAP were similar among the four types of hospitals evaluated. This finding contrasts with those we reported previously that showed VA patients hospitalized with PCP during from 1987 to 1990 had 4% and 6% higher mortality rates than those who received care in public and private hospitals, respectively.1
We also identified large variations in tuberculosis awareness among the four types of hospitals. Physicians at VA and county hospitals were twice to three times as likely as those at private hospitals to order respiratory isolation for patients with HIV infection and pneumonia. These variations in tuberculosis awareness can have public health implications. In the late 1980s and early 1990s, 30 to 40% of patients with HIV infection who were hospitalized with pneumonia were not placed in respiratory isolation rooms early in the hospitalization.27 In a study of tuberculosis care during 1994 to 1996, patients with tuberculosis as well as patients with HIV infection and pneumonia who received care at a county vs a private hospital were more likely to be placed in respiratory isolation.28 The only nosocomial outbreak of multidrug-resistant tuberculosis reported in the mid-1990s occurred at a private hospital in Chicago that had low usage rates of respiratory isolation rooms for patients who subsequently received a diagnosis of TB.28 Physicians at private hospitals should improve their rates of ordering respiratory isolation for high-risk individuals with pulmonary infections. Infection control personnel can help with these efforts by ensuring that individuals who have sputum studies ordered that include acid-fast bacilli smears are also placed in pulmonary isolation, a practice that was initiated at most public and VA hospitals following the occurrence of several outbreaks of multidrug-resistant tuberculosis in the late 1980s.
The limitations of our study should be noted. First, the study addresses inpatient care for individuals with HIV infection and pneumonia during 1995 through 1997, while much of the care for these persons has moved to the outpatient setting. Despite this, the HIV Costs and Services Utilization Study4 indicates that inpatient care still accounts for a substantial percentage of the annual medical costs of care for patients with HIV infection. Nonetheless, more recent data are needed and additional studies are recommended to evaluate patterns of care in the outpatient setting for individuals who receive care at VA, public, not-for-profit private, and for-profit private hospitals. Second, retrospective medical record review studies are limited by the potential for large amounts of incomplete data. However, we have developed and validated quality assurance systems for data retrieval, and focus primarily on data elements that are routinely available in most medical records. We did not collect information on other organizational characteristics (eg, clinician or institution experience caring for CAP and PCP patients) that might have shed light on additional factors that differentiate processes and outcomes between various hospital ownership types. Because our study population was obtained from three cities geographically dispersed across the United States, caution must be exercised in generalizing our findings to patients in other hospitals and cities.
In summary, this study provides the first overview of HIV-related pneumonia care in the early HAART era. For both PCP and CAP, large variations in the patterns of care, but not outcomes, were noted at VA, public, private not-for-profit, and for-profit hospitals. Overall, the quality of PCP care was quite good and showed dramatic improvement from the prior decade. There clearly evolved a higher degree of compliance with the National Institutes of Health HIV-related PCP management guidelines with respect to timely initiation of antibiotics and corticosteroids. However, in contrast, we found far worse compliance with guidelines for the management of CAP. Significant numbers of hospitalized persons did not receive appropriate antibiotics during the first day of hospitalization, raising concern that adverse outcomes may have occurred as a result of delays in care. Finally, PCP represents a unique experience where comprehensive assessments of quality and outcomes of care have been conducted since the identification of the first cases of the illness.29 30 31 It will be important to reassess these measures in the third decade of the epidemic, as awareness and familiarity with PCP continues to decline.
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This study was supported in part by grants from the National Institute of Drug Abuse (5R01DA10628-02), and the Health Services Research Division of the Department of Veteran Affairs (RCD 99 011 and RCD 00 004).
Received for publication June 12, 2003. Accepted for publication August 19, 2003.
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This article has been cited by other articles:
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M. J. Rosen Intensive Care of Patients With Human Immunodeficiency Virus Infection: Time to Take Another Look J Intensive Care Med, December 1, 2005; 20(6): 312 - 315. [PDF] |
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