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Biomedical subjects

C L Davis

Publications and source records attributed to C L Davis.

191 records · Page 11Linked to original sources

Recombinant human granulocyte macrophage colony stimulating factor following alternating non cross resistant chemotherapy in Hodgkin's disease.

Fourteen patients with Hodgkin's disease (two previously untreated, 12 following relapse or with refractory disease) were treated with a combination chemotherapy regimen comprising chlorambucil, vinblastine, procarbazine, prednisolone, etoposide, vincristine and adriamycin administered on days 1-8. Recombinant human granulocyte-macrophage colony stimulating factor (rhGM-CSF) (mammalian glycosylated, Sandoz/Schering-Plough) was administered after alternate cycles of chemotherapy from day 10 for 7 days by continuous intravenous (i.v.) infusion in 12 patients in a dose finding study (dose: 2 micrograms/kg/day in four patients, 4 micrograms/kg/day in four patients and 8 micrograms/kg/day in four patients) and by daily subcutaneous (s/c) injections in two patients (8 micrograms/kg/day). There was a rapid peripheral leucocytosis following the rhGM-CSF, reaching a peak at 1-2 days in 12/14 patients. The initial leucocytosis was composed of neutrophils followed by a rise in immature myeloid cells. There was no difference observed in the duration or depth of the nadir following chemotherapy or in the rate of recovery of peripheral white cell counts between cycles with and without rhGM-CSF in patients treated with 2 and 4 micrograms/kg/day. At the dose of 8 micrograms/kg/day, 3/6 patients had a shorter nadir duration in the cycle with rhGM-CSF, compared with cycle without rhGM-CSF. There was no difference in frequency of infection in cycles with and without rhGM-CSF. Following chemotherapy, six patients achieved clinical remission, six partial remission and two had progressive disease.

Adult↗

Etoposide in combination with intermediate dose cytosine arabinoside (ID ARA C) given with the intention of further myeloablative therapy for the treatment of refractory or recurrent hematological malignancy.

Thirty-four patients with refractory or recurrent high grade non-Hodgkin's lymphoma (NHL) or acute leukemia were treated with a combination of etoposide, 100 mg/m2 daily, and ara C, 1 g/m2 twice daily, for 5 days (VPARAC). This therapy was given in the anticipation that remissions thus achieved would be 'consolidated' with myeloablative therapy supported by bone marrow transplantation (BMT). The complete remission rate (CR) in patients with NHL was 3/18 (17 per cent) with partial responses (PR) seen in a further four patients, giving an overall response rate of 39 per cent. Four patients (three in CR, one in PR) proceeded to the planned consolidation treatment. Complete remission was achieved in 2/8 (25 per cent) patients with acute myelogenous leukemia (AML) and in 2/8 patients with acute lymphoblastic leukemia (ALL). Three of these patients subsequently had myeloablative consolidation therapy with BMT. There were four treatment-related deaths (NHL, two; AML, one; ALL, one). In poor risk patients with high grade NHL and acute leukemia, VPARAC is an effective remission induction programme in 21 per cent of patients. Seven of the original 34 patients received the intended 'curative' therapy, of whom only four are alive and well 1 year later.

Adolescent↗

History of gestational diabetes, insulin resistance and coronary risk.

The purpose of this study was to examine characteristics associated with the insulin metabolic syndrome, including insulin resistance, abnormal glucose tolerance, dyslipidemia, obesity, and elevated blood pressure, among women who have experienced gestational diabetes. 39 nondiabetic, young (20-42 years), postpartum (3-18 months) white women were recruited from obstetrical clinics. Twenty-one women had a history of gestational diabetes; 18 had uncomplicated pregnancies. Multivariate analyses revealed a significant difference between groups in insulin resistance (M, measured by euglycemic clamp) and insulin levels (from an oral glucose tolerance test), with insulin resistance showing a statistically stronger difference than insulin levels. Groups also differed significantly when compared on a set of variables associated with insulin metabolic syndrome: glucose tolerance, triglycerides, blood pressure, and body-mass index. Using insulin resistance as a covariate eliminated these group differences, suggesting that insulin resistance is the key factor underlying insulin metabolic syndrome. The higher risk of later developing type 2 diabetes and hypertension in women who have a history of gestational diabetes is explicable by their poorer profile on variables associated with insulin metabolic syndrome, and appears to be attributable to insulin resistance. Thus, insulin resistance appears to distinguish young women at risk for cardiovascular disease.

Adult↗

Incentivized digital outcomes collection.

The objective of this study was to assess the feasibility of digital patient satisfaction outcomes collection using the Internet and interactive voice response technology. Patients, health care providers, and industry sponsors were provided with incentives to participate. The participants included the practitioners and patients in medical and surgical practices who used Project Quality Card (patent pending) and the Practice Improvement Program. The study subjects were convenience samples of new and established patients seen between September 1999 and December 2000. There were 3 different pilot projects: QC1, QC2, and QC3. Patients were provided with a 20-minute prepaid phone card as an incentive for completing an interactive voice response call. Patients answered the 9-item visit rating questionnaire used to measure patient satisfaction. Patients responded on a 5-point scale, with 5 being excellent, and responses were totaled in the categories of patient access and physician attributes and in an overall score for the visit. A total of 998 patients from 77 physician offices participated. The activation responses, or percentage of patients using the Quality Cards, ranged from 12.8% in group 2 (QC2) to 26.6% in group 1 (QC1) to 34.8% in group 3 (QC3). This study demonstrates that incentivized digital outcomes collection can be successfully implemented in multisite community-based medical and surgical offices. The use of Project Quality Card (interactive voice response technology) and the Practice Improvement Program provides opportunities for user-friendly, benchmarked, real-time data collection. The percentage of patient activations is linked to provider participation in quality improvement programs. Patient participation is improved as the frequency of contact with a peer-directed database increases.

Data Collection↗