United Health Care Insurance

November 10, 2008

ORIGINAL INVESTIGATION: Thrombolytic Therapy and Mortality in Patients With Acute Pulmonary Embolism

Filed under: Uncategorized — hope @ 3:00 pm

Background  In the management of acute pulmonary embolism, the prevalence of thrombolytic therapy is uncertain, and its benefits compared with standard anticoagulation remain a subject of debate.

Methods  This analysis included 15 116 patient discharges with a primary diagnosis of pulmonary embolism from 186 acute care hospitals in Pennsylvania (January 2000 to November 2002). We compared propensity score–adjusted mortality between patients who received thrombolysis and those who did not, using logistic regression to model mortality within 30 days of presentation and Poisson regression to model in-hospital mortality.

Results  Of the 15 116 patient discharges, only 356 (2.4%) received thrombolytic therapy. The overall 30-day mortality rate for patients who received thrombolytic therapy was 17.4% compared with 8.6% for those who did not. The corresponding in-hospital mortality rates were 19.6 and 8.3, respectively, per 1000 person-days. However, mortality risk associated with thrombolysis varied with the propensity to receive thrombolysis: the odds ratios of 30-day mortality were 2.8 (P = .007), 3.9 (P < .001), 1.8 (P = .09), 1.0 (P = .98), and 0.7 (P = .30) for patients in the lowest to the highest quintiles of the propensity score distribution who received thrombolysis. A similar pattern was observed in the risk ratios for in-hospital death.

Conclusions  In this large sample of patients hospitalized for acute pulmonary embolism, thrombolytic therapy was used infrequently. Risk of in-hospital and 30-day mortality appears to be elevated for patients who were unlikely candidates for this therapy based on characteristics at presentation, but not for patients with a relatively high predicted probability of receiving thrombolysis.

INVITED COMMENTARY: Thrombolytic Therapy and Mortality in Patients With Acute Pulmonary Embolism–Invited Commentary

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ORIGINAL INVESTIGATION: Global Secondary Prevention Strategies to Limit Event Recurrence After Myocardial Infarction: Results of the GOSPEL Study, a Multicenter, Randomized Controlled Trial From the Italian Cardiac Rehabilitation Network

Filed under: Uncategorized — hope @ 3:00 pm

Background  Secondary prevention is not adequately implemented after myocardial infarction (MI). We assessed the effect on quality of care and prognosis of a long-term, relatively intensive rehabilitation strategy after MI.

Methods  We conducted a multicenter, randomized controlled trial in patients following standard post-MI cardiac rehabilitation, comparing a long-term, reinforced, multifactorial educational and behavioral intervention with usual care. A total of 3241 patients with recent MI were randomized to a 3-year multifactorial continued educational and behavioral program (intervention group; n = 1620) or usual care (control group; n = 1621). The combination of cardiovascular (CV) mortality, nonfatal MI, nonfatal stroke, and hospitalization for angina pectoris, heart failure, or urgent revascularization procedure was the primary end point. Other end points were major CV events, major cardiac and cerebrovascular events, lifestyle habits, and drug prescriptions.

Results  End point events occurred in 556 patients (17.2%). Compared with usual care, the intensive intervention did not decrease the primary end point significantly (16.1% vs 18.2%; hazard ratio [HR], 0.88; 95% confidence interval [CI], 0.74-1.04). However, the intensive intervention decreased several secondary end points: CV mortality plus nonfatal MI and stroke (3.2% vs 4.8%; HR, 0.67; 95% CI, 0.47-0.95), cardiac death plus nonfatal myocardial infarction (2.5% vs 4.0%; HR, 0.64; 95% CI, 0.43-0.94), and nonfatal MI (1.4% vs 2.7%; HR, 0.52; 95% CI, 0.31-0.86). A marked improvement in lifestyle habits (ie, exercise, diet, psychosocial stress, less deterioration of body weight control) and in prescription of drugs for secondary prevention was seen in the intervention group.

Conclusion  The GOSPEL Study is the first trial to our knowledge to demonstrate that a multifactorial, continued reinforced intervention up to 3 years after rehabilitation following MI is effective in decreasing the risk of several important CV outcomes, particularly nonfatal MI, although the overall effect is small.

Trial Registration  ClinicalTrials.gov Identifier: NCT00421876

ORIGINAL INVESTIGATION: Prediction of Infection Due to Antibiotic-Resistant Bacteria by Select Risk Factors for Health Care-Associated Pneumonia

Filed under: Uncategorized — hope @ 3:00 pm

Background  Pathogens such as methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa now cause pneumonia in patients presenting to the hospital. The concept of health care–associated pneumonia (HCAP) attempts to capture this, but its predictive value is unclear.

Methods  We examined patients admitted with pneumonia; infection with a resistant pathogen served as the study end point. Health care–associated pneumonia was present if a patient met one of the following criteria: recent hospitalization, nursing home residence, long-term hemodialysis, or immunosuppression. We compared rates of resistant infection among patients meeting any criteria for HCAP with those who did not have HCAP and explored the individual components of the definition.

Results  Among the cohort (n = 639), resistant pathogens were recovered in 289 (45.2%). Although each component of HCAP occurred more frequently in persons with resistant infections, the broad definition had a specificity of only 48.6% and misclassified one-third of the subjects. Logistic regression showed 4 variables associated with resistant pneumonia: recent hospitalization, nursing home residence, hemodialysis, and intensive care unit admission. A scoring system assigning 4, 3, 2, and 1 points, respectively, for each variable had moderate predictive power for segregating those with and without resistant bacteria. Among patients with fewer than 3 points, the prevalence of resistant pathogens was less than 20% compared with 55% and more than 75% in persons with scores ranging from 3 to 5 and more than 5 points, respectively (P < .001).

Conclusions  Although resistance is common in HCAP, not all component criteria for HCAP convey similar risk. Simple scoring tools may facilitate more accurate identification of persons with pneumonia caused by resistant pathogens.

ORIGINAL INVESTIGATION: Rapid Kidney Function Decline and Mortality Risk in Older Adults

Filed under: Uncategorized — hope @ 3:00 pm

Background  Impaired kidney function is associated with increased mortality risk in older adults. It remains unknown, however, whether longitudinal declines in kidney function are independently associated with increased cardiovascular and all-cause mortality in older adults.

Methods  The Cardiovascular Health Study evaluated a cohort of community-dwelling older adults enrolled from 1989 to 1993 in 4 US communities with follow-up through 2005. Among 4380 participants, the slope of annual decline in estimated glomerular filtration rate (eGFR) was estimated using both serum creatinine (eGFRcreat) and cystatin C (eGFRcys) rates, which were measured at baseline, year 3, and year 7 of follow-up. Rapid decline in eGFR was defined as a loss greater than 3 mL/min/1.73 m2 per year, and cardiovascular and all-cause mortality were assessed over a mean of 9.9 years of follow-up.

Results  Mean (SD) levels of creatinine and cystatin C were 0.93 (0.30) mg/dL and 1.03 (0.25) mg/L, respectively; mean (SD) eGFRcreat and eGFRcys were 79 (23) mL/min/1.73 m2 and 79 (19) mL/min/1.73 m2, respectively. Individuals with rapid decline measured by eGFRcreat (n = 714; 16%) had increased risk of cardiovascular (adjusted hazard ratio [AHR], 1.70; 95% confidence interval [CI], 1.40-2.06) and all-cause (AHR, 1.73; 95% CI, 1.54-1.94) mortality. Individuals with rapid decline measured by eGFRcys (n = 1083; 25%) also had increased risk of cardiovascular (AHR, 1.53; 95% CI, 1.29-1.80) and all-cause (AHR, 1.53; 95% CI, 1.38-1.69) mortality. The association of rapid decline in eGFR with elevated mortality risk did not differ across subgroups based on baseline kidney function, age, sex, race, or prevalent coronary heart disease.

Conclusion  Rapid decline in eGFR is associated with an increased risk of cardiovascular and all-cause mortality in older adults, independent of baseline eGFR and other demographic variables.

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