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Biomedical subjects

J M Ramón Torrell

Publications and source records attributed to J M Ramón Torrell.

7 recordsLinked to original sources
PubMed1992

[Alimentary factors and gastric cancer: design of a hospital based case-control study].

One of the most widely used design in etiologic research is the case-control study. In the present work the methodology used in the design of a case-control study, performed in a hospital setting, which objectives was to verify etiological hypothesis related with food-intake and gastric adenocarcinoma and 234 controls from the population--188 selected through a randomized selection on the phone book and 46 following neighborhood criteria--are studied. The methodology and the development of the field work are described, with a special interest in the possible bias incurred during its design and development.

Adenocarcinoma↗
PubMed1991

[Immune response to hepatitis B vaccine produced with genetic engineering].

With the aim of evaluating the immune response obtained after the administration of the three standard doses of Hepatitis B vaccine obtained by recombinant DNA techniques (Engerix B) and the factors that may have an influence in it, we have studied 537 subjects belonging to different risk groups. The ratio of non-responders to the vaccine has been. We have found significant differences (p less than 0.001) when comparing the mean titers obtained amongst the groups of studied. We have observed a higher percentage amongst the non-responders in men, although there are not statistically significant differences between sexes. We compare the results obtained with those published by other groups.

Adolescent↗
PubMedDate not supplied

[Dietary knowledge: a comparative study between health professionals and the general population].

BACKGROUND: The aim of the study was to assess physicians knowledge about salt and cholesterol content of selected foods, compared with general population knowledge. METHODS: A cross-sectional study made in Ciudad Sanitaria y Universitaria de Bellvitge (Barcelona). 106 physicians (66% of total) and 71 students were surveyed voluntarily. The general population sample was chosen from Hospital outpatients by systematic random sampling method. RESULTS: A self-administered questionnaire about salt and cholesterol high or low content of some foods demonstrated statistically significant differences (p < 0.001) when the average score was compared between health care professionals and the general population group, but in many cases right answer percentage did not arise 60 percent. CONCLUSIONS: Although health care professionals knowledge about salt and cholesterol content of diet is higher than among general population, they need a better and continuous formation in this issue.

Adult↗
PubMedDate not supplied

[The epidemiology of central venous catheterization (CVC) in parenteral nutrition. The clinical implications and factors that determine the selection of germs].

The objective of the study is, on one hand, to determine the etiology and the clinical implications as a function of the isolated germ, of central venous catheterization in patients with parenteral nutrition in our hospital, and on the other hand, to determine which factors are associated with the selection of germs of central venous catheterization in parenteral nutrition. For this we included venous catheters, colonized for 5 years, and with a study of the different segments (connection, insertion point, and tip). As a function of the appearance of associated clinical symptoms, of the results of the blood culture, and of the clinical evolution of the patient, the variables which determine the level of pathogenicity of the different groups of germs in the central venous catheterization, are defined; for the study of the factors associated with the selection of the different groups of germs, 8 variables were chosen. The data obtained are statistically treated, and the results are considered to be significant if p < 0.05. The understanding of the different factors associated with the selection of germs, and the level of clinical pathogenesis of the different groups, allows a better level of the clinical action in the prevention of the infection associated with the catheter.

Adult↗