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Biomedical subjects

M Hanson

Publications and source records attributed to M Hanson.

174 records · Page 10Linked to original sources
PubMedDate not supplied

Chronic effects of gastroduodenal surgery on glucose and insulin response to oral glucose tolerance test in a population study.

Oral glucose tolerance test (OGTT) results were compared between 4,667 middle-aged males attending a preventive medical screening and intervention program in Malmö and the subjects in this sample who reported a history of previous operation for gastric or duodenal ulcer (n = 158, or 3.4%). 76% of the operated subjects were smokers in comparison with 50% in the general cohort of males of the same age. The glucose and insulin responses in the OGTT in both the smoking and non-smoking operated cases showed higher early peak values and a subsequent rapid drop of the levels with lower 120-min values of both glucose and insulin compared to the average screening cohort. This type of response to an oral glucose load had previously been well known in the acute and immediate postoperative stages of gastric and duodenal resection, but it had not been shown before that it seems to be a permanent effect and may chronically influence the results of OGTTs in the population. Gastro-duodenal surgery should be included among the factors which may significantly affect the chronic results and thereby also the clinical interpretation of the OGTTs in the population.

Blood Glucose↗
PubMedDate not supplied

Stages of change profiles among incarcerated drug-using women.

This study investigated the utility and psychometric properties of the University of Rhode Island Change Assessment Scale (URICA) in a sample of 257 female inmates from a large urban prison. It addressed three major issues: (a) whether URICA captures stages of change among female offenders with a recent history of drug abuse; (b) whether distinct, reliable subgroup profiles would emerge from a cluster analysis of the URICA scale; and (c) whether women in these clusters would differ in their demographic characteristics, drug-use patterns, or psychological symptoms. Results indicate that the URICA is a useful, reliable, and valid tool to assess stages of change in drug-using incarcerated women. Consistent with other studies conducted with different populations, the scale yielded five distinct stages: precontemplation, contemplation, preparation, action, and maintenance. Cluster analysis using the hierarchical agglomerate method classified the subjects into five clusters, which correlated with subjects' psychological symptoms. Intervention implications of URICA are discussed.

Adult↗
PubMedDate not supplied

Basic principles of thermal dosimetry and thermal thresholds for tissue damage from hyperthermia.

This paper is one of several in this Special Issue of the International Journal of Hyperthermia that discusses the current state of knowledge about the human health risks of hyperthermia. This special issue emanated from a workshop sponsored by the World Health Organization in the Spring of 2002 on this topic. It is anticipated that these papers will help to establish guidelines for human exposure to conditions leading to hyperthermia. This comprehensive review of the literature makes it clear that much more work needs to be done to clarify what the thresholds for thermal damage are in humans. This review summarizes the basic principles that govern the relationships between thermal exposure (temperature and time of exposure) and thermal damage, with an emphasis on normal tissue effects. Methods for converting one time-temperature combination to a time at a standardized temperature are provided as well as a detailed discussion about the underlying assumptions that go into these calculations. There are few in vivo papers examining the type and extent of damage that occurs in the lower temperature range for hyperthermic exposures (e.g. 39-42 degrees C). Therefore, it is clear that estimation of thermal dose to effect at these thermal exposures is less precise in that temperature range. In addition, there are virtually no data that directly relate to the thermal sensitivity of human tissues. Thus, establishment of guidelines for human exposure based on the data provided must be done with significant caution. There is detailed review and presentation of thermal thresholds for tissue damage (based on what is detectable in vivo). The data are normalized using thermal dosimetric concepts. Tables are included in an Appendix Database which compile published data for thresholds of thermal damage in a variety of tissues and species. This database is available by request (contact MWD or PJH), but not included in this manuscript for brevity. All of the studies reported are for single acute thermal exposures. Except for brain function and physiology (as detailed in this issue by Sharma et al) one notes the critical lack of publications examining effects of chronic thermal exposures as might be encountered in occupational hazards. This review also does not include information on the embryo, which is covered in detail elsewhere in this volume (see article by Edwards et al.) as well as in a recent review on this subject, which focuses on thermal dose.

Animals↗
PubMedDate not supplied

Risk factors for lack of detectable antibody following hepatitis B vaccination of Minnesota health care workers.

OBJECTIVE: To assess the presence of antibody to hepatitis B surface antigen (anti-HBs) at postvaccination testing in Minnesota health care workers receiving recombinant hepatitis B vaccines, and to identify risk factors for lacking anti-HBs following hepatitis B vaccination. DESIGN: Retrospective cohort study. SETTING: Ten acute care hospitals in Minnesota. PARTICIPANTS: A total of 595 health care workers who had received hepatitis B vaccine (Recombivax HB or Engerix-B) between June 1987 and December 1991 and who underwent postvaccination testing for anti-HBs within 6 months after receiving the third dose of vaccine. MAIN OUTCOME MEASURE: Presence or absence of anti-HBs following hepatitis B vaccination. RESULTS: Five variables were independently associated with lacking anti-HBs by multivariate analysis: vaccine brand, smoking status, gender, age, and body mass index. Stratifying by vaccine brand demonstrated that age (P = .01), body mass index (P < .01), and smoking status (P < .01) were associated with lacking anti-HBs only for Recombivax HB recipients; and gender (P = .03) was associated with lacking anti-HBs only for Engerix-B recipients. After controlling for smoking status, age, gender, and body mass index, recipients of Recombivax HB were more likely to lack anti-HBs than recipients of Engerix-B (relative risk, 2.3; 95% confidence interval, 1.1 to 4.7; P = .02). CONCLUSIONS: Results indicate that certain populations of health care workers are at increased risk of not responding to hepatitis B vaccination. Further studies evaluating immunogenicity of currently available recombinant hepatitis B vaccines in persons at high risk for primary vaccine failure are needed.

Adult↗