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Biomedical subjects

B Portnoy

Publications and source records attributed to B Portnoy.

At least 19 recordsLinked to original sources
PubMed1994

"Eat for Health": a supermarket intervention for nutrition and cancer risk reduction.

OBJECTIVES: The results of an evaluation of "Eat for Health," a supermarket nutrition intervention, are presented. The study tested whether such a program could be successfully carried out and whether it could effect changes in knowledge, attitudes, and food purchasing behavior in line with nutrition and cancer risk reduction guidelines. METHODS: The evaluation consisted of an in-store monitoring element, an in-store and telephone consumer survey, and an analysis of sales data on selected foods. A matched-pair design, using a total of 40 stores in the intervention and comparison groups, was used. RESULTS: The intervention was successfully implemented and had limited success in changing some food purchasing behaviors. There appeared to be no effect on knowledge and attitudes except for increased awareness of a link between diet and cancer and of the program itself. CONCLUSIONS: Despite the intervention's success, limitations of the consumer survey and sales data analyses and the continuing diffusion of nutrition messages throughout society make it difficult to specify the impact of this program on consumer nutrition knowledge and behaviors.

Adult↗
PubMed1991

Black-white differences in cancer prevention knowledge and behavior.

Data from the 1987 National Health Interview Survey Cancer Control Supplement were used to estimate multivariate logistic regression models of diet change, mammography utilization, stool blood test utilization, and smoking. Predictor variables included race, sex, age, income, dietary concerns, and four knowledge-related variables: education and three measures of cancer prevention knowledge. When knowledge variables were included in the models, race was not a significant predictor of behavior, with one exception: among women, Blacks were found to smoke less than Whites.

Adult↗
PubMed1989

Risk reduction through comprehensive cancer education: the American Cancer Society Plan for Youth Education.

The American Cancer Society (ACS) Plan for Youth Education for the Year 2000 is discussed in consideration of other health initiatives such as the U.S. Dept. of Health and Human Services' Objectives for the Nation and the National Cancer Institutes' Cancer Control Objectives for the Year 2000. Objectives of the ACS Plan are detailed with corresponding data sources to monitor progress. The Plan is designed to serve as a framework for ACS program planning, implementation, and evaluation in substance use, nutrition and eating patterns, cancer-early detection, cancer-the disease, and the environment. Justification for selecting the priority program areas also is described.

Adolescent↗
PubMed1989

Diffusion of cancer education into schools.

Though implementing health education in schools has numerous advantages, many barriers impede adoption of effective curricula. Diffusion theory provides a framework for understanding why some school systems do not implement comprehensive, sequential, and behaviorally oriented curricula. Reasons for failure to provide optimal health education include competition for time, unawareness of resources and research results, political considerations, long-range planning difficulties, lack of teacher training, lack of testing, other academic priorities, uncertainty about responsibility for health education, and costs. Health educators can overcome such difficulties by working within existing curricular agendas, political interests, and budgets, and by organizing interventions through school health councils, while recognizing local programs, conditions, and resources.

Adolescent↗
PubMed1989

Cancer knowledge and related practices: results from the National Adolescent Student Health Survey.

The National Adolescent Student Health Survey (NASHS) provides information on student knowledge, attitudes, and self-reported practices of eighth and 10th grade students in eight health areas. Data from the NASHS were reviewed relative to cancer risk factors, specifically, smoking, smokeless tobacco use, and nutrition. About 21% of 10th grade students reported smoking and a large percentage of both eighth and 10th grade students reported eating foods high in fat. The data indicate youth may be at increased risk for cancer and that much of that risk can be reduced by eliminating smoking and lowering dietary fat.

Adolescent↗
PubMed1987

Rotavirus gastroenteritis. Clinical and laboratory features and use of the Rotazyme test.

Clinical and laboratory features of 86 infants admitted with diarrhea and dehydration were evaluated prospectively. Human rotavirus (HRV) infection was documented in 35 infants (41%) by the Rotazyme test. Those with HRV gastroenteritis (HRV+ group) had a shorter duration of diarrhea prior to admission, more severe dehydration on presentation, and a longer hospital course than the HRV-negative (HRV-) group. Vomiting, fever, upper respiratory tract symptoms, otitis media, and cough were present in equal numbers of infants in both groups. The HRV+ infants had lower serum bicarbonate and higher serum albumin, alanine aminotransferase, aspartate aminotransferase, and uric acid concentrations than did the HRV- infants. Serum uric acid levels greater than 10 mg/dL (590 mumol/L) were present in 69% of HRV+ vs 29% of HRV- infants. The Rotazyme test was found to be a valuable tool in diagnosis; testing on two days increased the yield from 74% to 97% of all infants finally diagnosed as HRV+. The optimal time for testing was within the first five days of illness.

Diarrhea, Infantile↗
PubMed1982

Activity of human leukocyte interferon in a human tumor cloning system.

Clinical trials using interferon to treat human malignancies are currently hampered by limited supplies of the compound. We have utilized a human tumor cloning system as an assay for the antitumor effects of human leukocyte interferon. Interferon was tested against 62 patients' tumors growing in this soft agar system. A dose-dependent cytotoxic effect of interferon was noted against only five of the patients' tumors. A greater than or equal to 70% decrease in tumor colony-forming units (TCFUs) was noted with one lymphosarcoma cell leukemia, one small cell lung cancer, one adenocarcinoma of the lung, one breast cancer, and a pancreatic cancer. One patient had his tumor cultured in vitro and had a clinical trial with interferon. This patient whose tumor demonstrated in vitro sensitivity had a clinical antitumor effect with interferon therapy. The in vitro results in this study suggest that the human leukocyte interferon currently available has a low level of activity in a human tumor cloning system. Additional testing is needed to determine whether the cloning system can identify the patient(s) who might have an antitumor effect from the interferon.

Clone Cells↗
PubMed1982

Pneumococcal polysaccharide immunization of children with sickle cell disease. I. Clinical reactions to immunization and relationship to preimmunization antibody.

Vaccine reaction data were obtained from 154 patients with sickle cell disease immunized with tetradecavalent pneumococcal polysaccharide vaccine. There was a high rate (70%) of mild reactions, primarily at the site of injection. Fever over 100 degrees F was uncommon and precipitation of symptoms similar to sickling crisis was rare. Development of local reactions was associated with the level of preimmunization pneumococcal antibody titer.

Anemia, Sickle Cell↗
PubMed1982

Pneumococcal polysaccharide immunization of children with sickle cell disease. II. Serologic response and pneumococcal disease following immunization.

One-hundred seventy-four children with sickle cell disease (SCD) were immunized with a single dose of tetradecavalent pneumococcal vaccine. Preimmunization and postimmunization antibody against 13 of the 14 pneumococcal capsular antigens was measured by indirect hemagglutination (IHA). The ability of each antigen to stimulate antibody following immunization was characterized by one of three types of responses: (1) poor antibody response regardless of the age at immunization (capsular types 6A, 14, and 19F); (2) improving antibody response with advancing age at immunization (capsular types 1, 4, 9N, 12F, 18C, and 23F); and (3) good antibody response regardless of age at immunization (capsular types 2, 3, 7F, and 8). An increase in antibody following immunization was significantly correlated (P less than 0.0005) with an increasing level of preimmunization antibody titer for all 13 antigens. Through the first 24 months of study, two episodes of pneumococcal sepsis caused by group 23 pneumococci were documented in two children immunized prior to 24 months of age (incidence rate, 4.40/100 patient-years in children less than 5 years of age), and one additional episode caused by a group 23 pneumococcus occurred in a 5 7/12-year-old child (incidence rate, 0.66/100 patient-years in children greater than 5 years of age). These observations suggest that anamnestic immune response significantly contributed to the enhanced antibody response observed in older children and adults. Only modest vaccine efficacy may be expected among children with SCD who receive a single dose of pneumococcal vaccine.

Adolescent↗
PubMed1981

Rubella vaccine and susceptible hospital employees. Poor physician participation.

A serosurvey of 2,456 high-risk employees of the Los Angeles County-University of Southern California Medical Center showed that 345 (14%) were susceptible to rubella. Of 197 seronegative personnel followed up for participation in a vaccination program, 105 (53.3%) were vaccinated. However, only one of the 11 known susceptible obstetrician-gynecologists was vaccinated. Thirty-eight seronegative employees who were vaccinated with RA 27/3 rubella vaccine were queried four to six weeks after vaccination and compared with 32 unvaccinated seropositive control subjects. Although the reaction rate was 50% among vaccinees and 3% among control subjects, each vaccinee lost only an average of 0.2 workdays compared with 0.1 workdays for control subjects. The high rate of susceptibility to rubella among hospital employees supports the need for screening. Although vaccine reactions are common, they are generally mild. Means must be found to ensure greater employee acceptance of vaccine.

California↗
PubMed1979

Neutron activation analysis of trace elements in skin. VIII. Selenium in normal skin.

Selenium(Se) has been determined in skin by neutron activation analysis applying selective irradiation and cooling time, followed by measurement of the activity on a high resolution germanium lithium (Ge(Li)) detector. The levels and distribution of Se in normal abdominal and plantar skin, together with other available evidence, lead us to believe that it is an essential trace element in man. It is suggested that Se has an essential role in skin keratinization.

Abdomen↗
PubMed1979

Systemic lupus erythematosus in pregnancy treated with plasmapheresis.

A young woman developed severe systemic lupus erythematosus (SLE) at the beginning of her second pregnancy: her disease was extremely difficult to control and the baby died unexpectedly when 8 weeks old. She became very ill at the same time in her third pregnancy; plasmapheresis appeared to make her management easier, and the 7-month-old baby is doing well.

Adult↗