HL-A typing and cadaver-kidney transplants.
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Biomedical subjects
Publications and source records attributed to P Grob.
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BACKGROUND: Treatment of acute otitis media (AOM) differs worldwide. The Dutch avoid antimicrobials unless fever and pain persist; the British use them for 5 to 7 days, and Americans use them for 10 days. If effects of therapies are to be compared, it is necessary to evaluate rates of risk factors, severity of attacks, and their influence on treatment decisions. We wanted to compare the prevalence of risk factors for AOM and evaluate their association with severity of attacks and of severity with antimicrobial treatment. METHODS: We undertook a prospective cohort study of 2,165 patients with AOM enrolled by primary care physicians; 895 were enrolled from North America, 571 were enrolled from the United Kingdom, and 699 were enrolled from The Netherlands. The literature was searched using the key words "acute otitis media," "severity," and "international comparisons." RESULTS: The prevalence of several AOM risk factors differs significantly among patients from the three country networks; these factors include race, parent smoking habits, previous episodes, previous episodes without a physician visit, tonsillectomy or adenoidectomy, frequency of upper respiratory tract infections, day care, and recumbent bottle-feeding. Dutch children have the most severe attacks as defined by fever, ear discharge, decreased hearing during the previous week, and moderate or severe ear pain. In country-adjusted univariate analyses, increasing age, exposure to tobacco smoke, day care, previous attacks of AOM, previous attacks without physician care, past prophylactic antimicrobials, ear tubes, adenoidectomy, and tonsillectomy all contribute to severity. Only country network, age, history of AOM, previous episode without physician care, and history of adenoidectomy and tympanostomy tubes are independently related to increased severity, while current breast-feeding is protective. Severity of attacks influences treatment decisions. Dutch children are least likely to receive antimicrobials, and even for severe attacks the British and Dutch physicians usually use amoxicillin or trimethoprim-sulfa; North American children with severe attacks are more likely to receive a broad-spectrum second-line antimicrobial. CONCLUSION: Dutch children have the highest ratings in all severity measures, possibly reflecting parental decisions about care seeking for earaches. When comparing groups of patients with AOM, it is necessary to adjust for baseline characteristics. Severity of episode affects physician treatment decisions. Adoption of Dutch guidelines restricting use of antimicrobials for AOM in the United States could result in annual savings of about $185 million.
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BACKGROUND: Of 22 million visits annually to United States physicians for acute otitis media, almost 4 million are by patients 15 years old or older. Yet the clinical spectrum and variables related to recovery have not been reported for adults. METHOD: Data originated from 3224 primary care patients with acute otitis media, of whom 500 were 15 years old or older, who were enrolled in a prospective study in eight countries. At the initial visit, history, symptoms, physical findings, and treatment were recorded. At a 2-month follow-up visit, changes in treatment and recovery were recorded. RESULTS: Compared with children, adults sought care more quickly after symptom onset; were more likely to have had a tonsillectomy or adenoidectomy; and were more likely to complain of ear pain, decreased hearing, sore throat, and ear discharge. Children were more likely to have a history of recent upper respiratory tract infection, serous otitis media, and ear tubes; symptoms of fever, diarrhea, and vomiting; and tympanic membrane findings of redness, bulging, and ear tubes in place. History of reduced hearing, allergy, prophylactic antibiotics, and tympanic membrane findings characterized as opaque or dull, fluid, draining pus, perforation, and not visualized were equally frequent in both age groups. For adults, neither type nor duration of antibiotic affected outcome. Patients receiving antibiotics had lower rates of recovery than those who did not. The likelihood of a poor outcome increased with an increasing number of past episodes of acute otitis media and with increasing age. CONCLUSION: Although history and symptoms differ in adults and children, the similarity of tympanic membrane findings is consistent with previous reports of a similar bacterial spectrum in both groups. Recovery is related more to individual patient characteristics and history than to antibiotic therapy. Adults have an increased rate of poor outcome at 2 months compared with children.