Publications by authors named "David K Lewis"

The purpose of this study was to assess changes in forest owners' preferences regarding indicators of sustainable forest management. The analysis and deliberation framework served as a platform upon which to explore these changes in a rural community in Puebla, Mexico. Sixty-two indicators were selected from existing sets to design a five-point Likert survey instrument.

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Objective: To explore the views of German general practitioners, healthcare assistants, and laypeople about the minimum absolute risk reduction needed to justify drug treatment to prevent heart attacks, and to compare these views with those found in the UK.

Method: Qualitative content analysis study using the same clinical risk scenario and semi-structured interview schedule concerning a "pill" reducing cardiovascular risk as a recent UK study. The similarly recruited participants included six general practitioners (GPs), four healthcare assistants, and 12 laypeople, interviewed in 10 GP surgeries, two community settings, and five private homes.

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We evaluated peripheral blood tests to diagnose iron deficiency on medical wards in Blantyre, Malawi, where infection and HIV are prevalent. We compared full blood count, ferritin and serum transferrin receptor (TfR) levels with an estimation of iron in bone marrow aspirates. Of consecutive adults admitted with severe anaemia (haemoglobin <7 g/dl), 81 had satisfactory bone marrow aspirates.

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Severe anaemia is a common presentation in non-pregnant adults admitted to hospital in southern Africa. Standard syndromic treatment based on data from the pre-HIV era is for iron deficiency, worms and malaria. We prospectively investigated 105 adults admitted consecutively to medical wards with haemoglobin < 7 g/dl.

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Objective: To determine the contribution of a blood culture service to the diagnosis of fever in a resource-poor setting and to identify clinical predictors of specific bloodstream infections (BSI).

Methods: In a descriptive, prospective study at the Medical Wards at Queen Elizabeth Central Hospital, Blantyre, Malawi, we tried to identify a specific cause of fever in febrile patients, comparing the use of routinely available diagnostic methods with the same methods plus blood culture. Clinical predictors of specific BSIs were sought.

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Objectives: To explore the views of clinicians and lay people about the minimum benefit needed to justify drug treatment to prevent heart attacks, and to explore the rationale behind treatment decisions.

Design: Qualitative study using semi-structured interviews.

Participants: 4 general practitioners, 4 practice nurses, and 18 lay people.

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Despite high seroprevalence there are few recent studies of the effect of human immunodeficiency virus (HIV) on hospitals in sub-Saharan Africa. We examined 1226 consecutive patients admitted to medical and surgical wards in Blantyre, Malawi during two 2-week periods in October 1999 and January 2000: 70% of medical patients were HIV-positive and 45% had acquired immune deficiency syndrome (AIDS); 36% of surgical patients were HIV-positive and 8% had AIDS. Seroprevalence rose to a peak among 30-40 year olds; 91% of medical, 56% of surgical and 80% of all patients in this age group were HIV-positive.

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Despite high seroprevalence there are few recent studies of the effect of HIV on hospitals in sub-Saharan Africa. We examined 1226 consecutive patients admitted during two 2-week periods in October 1999 and January 2000. 70% medical patients were HIV positive, and 45% had AIDS.

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