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Biomedical subjects

N R Boyd

Publications and source records attributed to N R Boyd.

30 records · Page 2Linked to original sources
PubMed1985

Carotid palpation at two exercise intensities.

It remains unclear whether carotid palpation (CP) should be used to count post-exercise heart rate (HR). We hypothesized that the carotid sinus, when stretched or compressed by external pressure, results in an increased nerve activity to the cardiovascular areas in the brain stem, with a resultant increase in parasympathetic activity and a decrease in sympathetic activity. The primary purpose of this study was to investigate the effects of CP and no CP on post-exercise HR determination at two exercise intensities. The secondary purposes were to investigate whether CP during exercise would elicit a decrease in HR and the effects of CP on post-exercise blood pressure. Twenty-one healthy females served as subjects. During the final min of each exercise intensity, two 10-s HRs were recorded by continuous ECG (i.e., 10 s without palpation and 10 s with palpation). Immediately post-exercise at each intensity, the carotid artery was either palpated (Phase I) or not palpated (Phase II). At 60 and 80% intensity, with 10-s CP, post-exercise HR decreased 12.4 and 7 beats . min-1, respectively (both were significant: P less than 0.05). At 60 and 80% intensity, without CP, post-exercise HR decreased 6.1 and 3.3 beats . min-1 in 10-s, respectively (both were significant; P less than 0.05). CP during exercise did not elicit a carotid sinus reflex, and post-exercise CP did not alter blood pressure readings. These findings were generally contrary to previous research on CP and were determined to be important in that the correct technique was used by the investigators.(ABSTRACT TRUNCATED AT 250 WORDS)

Adolescent↗
PubMed1983

Use of progestogens as an adjuvant to surgery in the treatment of stage I adenocarcinoma of the uterine corpus.

Fifty-nine patients with proven stage I adenocarcinoma of the uterine corpus were treated by total abdominal hysterectomy and bilateral salpingo-oophorectomy, followed by gestronal hexanoate intramuscularly for 3 months and then medroxyprogesterone acetate orally for a prolonged period. In the 7-year period of study, there were no vaginal recurrences, but one patient suffered a recurrence in the inguinal lymph nodes and pelvis. Undesirable side effects did not occur. These results compare favourably with other reported studies in which surgery and radiotherapy were used.

Adenocarcinoma↗
PubMedDate not supplied

Quit Today! A targeted communications campaign to increase use of the cancer information service by African American smokers.

BACKGROUND: African Americans have traditionally made little use of the Cancer Information Service (CIS), an information and education program of the National Cancer Institute, for smoking cessation assistance. This study evaluated whether a targeted communications campaign utilizing strategically placed radio and television advertisements in combination with community outreach could lead more adult African American smokers to call the CIS for smoking cessation information and materials. METHODS: Fourteen communities, served by four CIS regional offices, were carefully matched on demographic variables and then randomly assigned to either an experimental or a control group. Six radio advertisements targeting African American smokers to call the CIS for help in quitting smoking were developed and pretested for three different black-oriented formats. One television spot also was produced and pretested. The audio portion of the television ad was utilized as a seventh radio spot for the general programming formats. These advertisements were placed on selected radio and television stations reaching predominantly African American adult audiences. Also, copies of a videotape designed to motivate African American smokers to quit and to call the CIS for help in quitting were widely disseminated through community-based organizations in each experimental market. The aim was to increase the number and proportion of quitting-related calls to the CIS from African Americans within experimental communities. RESULTS: The call volume from African American smokers was significantly higher in the experimental communities than in the control communities (P < 0.008). The call rate from African American men was higher than typically observed. Overall, African Americans in the experimental communities reported radio more often than television as the way they heard about the CIS. CONCLUSION: The results suggest that paid targeted advertising, using radio as a primary channel, is an effective method of reaching an underserved population at risk. Future research directions are discussed.

Adult↗
PubMedDate not supplied

A self-help intervention for African American smokers: tailoring cancer information service counseling for a special population.

BACKGROUND: African Americans remain a critically underserved group for smoking cessation interventions. This study tested the effectiveness of a tailored, culturally sensitive intervention for African American smokers who called the NCI Cancer Information Service (CIS) for help to quit smoking. METHODS: This paper presents results of a 2-year study of tailored counseling strategies among African American smokers (n = 1,422) who called four regional CIS offices in response to a radio-based media campaign in 14 communities. Callers were randomly assigned to receive either the standard CIS quit smoking counseling and guide (Clearing the Air) or counseling and a guide (Pathways to Freedom) tailored to the quitting needs and barriers of African American smokers. Callers were predominantly female (63.6%). ages 20-49 (88%), with a high school education or more (84%). Median smoking history was 17 years; median smoking rate was 20 cigarettes/day. Standard (n = 689) and Tailored (n = 733) group subjects did not differ on most baseline measures. RESULTS: On most measures, Standard and Tailored counseling/guides received similar ratings, but the Tailored guide was rated as having more appealing photos (P = 0.001) and as being more appropriate for family members (P = 0.003). Six-month follow-up with 893 subjects (response rates were 63% Standard, 62% Tailored, ns) showed significantly more quit attempts (P = 0.002) and greater use of prequitting strategies (P < 0.05) among Tailored than among Standard subjects, but no differences in self-reported 1-week abstinence (14.4% Standard, 16.2% Tailored) (ns). An opportunistic 12-month follow-up of subjects recruited in the last year of the study (n = 445) (response rates were 57% Standard, 60% Tailored, ns) showed a significantly higher quit rate (15.4% Standard, 25.0% Tailored) for Tailored subjects (P = 0.034). CONCLUSIONS: Results show promise for tailored approaches to boost quit attempts and success rates among African American smokers.

Adult↗
PubMedDate not supplied

Genetic susceptibility testing in smoking-cessation treatment: one-year outcomes of a randomized trial.

This study evaluated the long-term impact of genetic susceptibility biomarker feedback on smoking behavior change and symptoms of depression in 426 male and female smokers. Smokers were randomized to one of three smoking-cessation interventions: minimal contact quit-smoking counseling (QSC), QSC + exposure biomarker feedback (EBF), and QSC + EBF + biomarker feedback about genetic susceptibility to lung cancer (SBF). The logistic regression model for quit attempt revealed a significant main effect for treatment such that participants in the SBF group were more than two times more likely to make a quit attempt than participants in the QSC group. There was not a significant difference between EBF and QSC participants. The results also revealed a significant effect for baseline stage of change. Those smokers in the preparation stage at baseline were more than three times more likely to make a quit attempt over the 12 months following treatment. The models for 30-day cessation and follow-up smoking rate revealed no significant main or interacting effects for treatment. A repeated measures analysis of variance revealed a significant main effect for time, indicating that an initial increase in depression in the genetic susceptibility group was not maintained over time. Genetic susceptibility feedback has the intended effects on motivation to quit, but it may need to be delivered within a more intensive smoking-cessation treatment for the heightened motivation to translate into smoking cessation.

Adolescent↗