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The increasing availability of medical evidence in clinical practice was expected to improve the quality of care. However, this has not been realized. A possible explanation is that quality of care is a complex concept and needs a wider scope. Starting from the Donabedian triangle of structure, process and outcome, a framework for the analysis of quality of care is presented. The need for three types of evidence is identified and discussed: medical, contextual and policy evidence. Although the body of medical evidence is increasing, it has major flaws and gaps hampering its applicability in primary care. There is also a need to focus on the context of the medical encounter, which has been shown to influence outcome, but is still not well researched. Finally, evidence on costs, cost utility and equity needs to be considered. Taking these different aspects of evidence into account, an agenda for research in primary care is set. The analytical framework may provide new insights in the quest for improving quality of health care. [ABSTRACT FROM AUTHOR]

OBJECTIVE: To compare the efficacy of amoxicillin vs placebo in patients with an acute upper respiratory tract infection and purulent rhinorrhea. STUDY DESIGN: Double-blind randomized placebo-controlled trial. POPULATION: The 416 patients included from 69 family practices were 12 years or older, presenting with acute upper respiratory complaints, and having a history of purulent rhinorrhea and no signs of complications of sinusitis. OUTCOMES MEASURED: Therapy success (disappearance of symptoms that most greatly affected the patient's health) at day 10 and duration of general illness, pain, and purulent rhinorrhea. RESULTS: Therapy was successful in 35% of patients with amoxicillin and in 29% of patients with placebo (relative risk [RR] 1.14, 95% confidence interval [CI], 0.92-1.42). There was no effect on duration of general illness or pain. Duration of purulent rhinorrhea was shortened by amoxicillin (9 days vs 14 for clearing of purulent rhinorrhea in 75% of patients; P = .007). Diarrhea was more frequent with amoxicillin (29% vs 19%, RR 1.28, 95% CI, 1.05-1.57). No complications were reported. One patient (0.5%) receiving amoxicillin and 7 (3.4%) receiving placebo discontinued trial therapy because of exacerbation of symptoms (RR 0.25, 95% CI 0.04-1.56, P = .07). All 8 patients recovered with antibiotic therapy. CONCLUSIONS: Amoxicillin has a beneficial effect on purulent rhinorrhea caused by an acute infection of the nose or sinuses but not on general recovery. The practical implication is that all such patients, whatever the suspected diagnosis, can be safely treated with symptomatic therapy and instructed to return if symptoms worsen. [ABSTRACT FROM AUTHOR]

A response by De Sutter and colleagues to a letter to the editor about their article "Does Amoxicillin Improve Outcomes in Patients With Purulent Rhinorrhea? A Pragmatic Randomized Double-Blind Controlled Trial in Family Practice," in the 2002 issue is presented.