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Biomedical subjects

S Cotton

Publications and source records attributed to S Cotton.

7 recordsLinked to original sources

Voluntary screening program for prostate cancer: detection rate and cost.

In a community-wide screening program conducted in Jacksonville, Florida, 564 participants received free screening for prostate cancer. Frequency of positive results of prostate-specific antigen measurement and digital rectal examination was comparable to that found in similar programs in other communities. The estimated cost for each participant was $231, and the cost to discover each cancer was $7,240. If one also includes initial therapy in cost estimates, then the cost per participant was $520, and the cost to find and treat each patient was $16,300. The value of screening for prostate cancer must be judged by treatment outcome and underlying costs.

Aged

Treatment of the anemia of chronic renal failure with subcutaneous recombinant human erythropoietin.

PURPOSE: The purpose of this study was to determine the efficacy of recombinant human erythropoietin (rHuEPO) given subcutaneously three times/week in patients with chronic renal failure and anemia (predialysis). PATIENTS AND METHODS: Eleven patients with predialysis chronic renal failure participated in a double-blind, placebo-controlled study of subcutaneously administered erythropoietin. For 12 weeks, patients received either rHuEPO 100 mu/kg body weight three times/week subcutananeously or a placebo. After 12 weeks of placebo, patients now also received rHuEPO in a dose up to 150 mu/kg three times/week until target hematocrit was achieved. Throughout the study, blood pressure was monitored closely and blood work was obtained regularly for hemoglobin, hematocrit, reticulocyte count, and iron profile determinations. RESULTS: At 12 weeks, the hematocrit of the treated group had risen from 29% +/- 2% to 35% +/- 2% (p less than 0.001). The placebo group baseline hematocrit was 28% +/- 2% and at 12 weeks 26% +/- 2% After 12 weeks of rHuEPO therapy, the hematocrit of the prior placebo group was 32% +/- 2% (p less than 0.001 versus baseline). No significant change in biochemical parameters was noted. Mean blood pressure values were comparable before and after treatment. All protein ultimately required iron supplementation. In two patients, the rate of progression of renal failure appeared to increase as their hematocrit rose and rHuEPO was discontinued. CONCLUSIONS: It is concluded that rHuEPO given subcutaneously is an effective and safe therapy for patients with chronic renal failure who are anemic and who are not receiving dialysis.

Adult

Evaluation of the National Acoustic Laboratories' new hearing aid selection procedure.

This study evaluated the National Acoustic Laboratories' (NAL) new formula for prescribing the gain and frequency response of a hearing aid. The frequency response prescribed for 44 clients (67 fitted ears) was compared with a series of variations having increased or decreased low-frequency and/or high-frequency emphasis. The evaluations consisted of paired-comparison judgments of the intelligibility of speech in quiet and the pleasantness of speech in noise. There were only 4 ears (6%) where a comparison response was more intelligible than the NAL response, but there were 16 ears (24%) where one of the comparison responses was more pleasant. On the average, hearing aid gain that was used by each subject agreed closely with prescribed gain. These trends were not affected by audiogram configuration, experience in aid usage, or type of aid limiting. The formula was found to be highly effective, but there were some cases where a change in aid prescription was indicated. A simple evaluation procedure using paired-comparison judgments is proposed for detecting such cases.

Aged

Antiplasmin activity of electrophoretically separated human serum fractions.

The antiplasmin which migrates electrophoretically with the alpha(2) globulins preponderates in effect over that of the alpha(1) migrating antiplasmin. This preponderance persists at physiological pH value in vitro and the significance of this finding is discussed. No evidence has been obtained of the existence of anti-urokinase activity in antiplasmin-free serum fractions.

Alpha-Globulins