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Biomedical subjects

W O Spitzer

Publications and source records attributed to W O Spitzer.

At least 145 records · Page 8Linked to original sources

Nurse practitioners in primary care. 3. The southern Ontario randomized trial.

A group of nurses who formerly had performed office functions received a special university-based educational program designed to prepare them to assume much of primary care management as nurse practitioners. The associated family physicians would shift their role to general supervision and attention to difficult clinical problems. To test this new form of practice, two complementary randomized trials have been conducted in south-central Ontario. The particular trial reported here was intended to assess the influence of the educational program on the changing roles of the professional personnel. The nurses of 14 family medical practices, with the physicians' support and commitment to participation, applied for the new training. Seven applicants were randomly selected to receive the training and their corresponding practices became the experimental group, while the remaining nurses and practices were retained as controls. During the subsequent year of investigation important changes occurred in professional roles of the experimental group. Nurse practitioners spent more time in clinical activities than conventional office nurses. The shift was not at the expense of time devoted to clinical work by physicians. Doctors delegated more professional activities to nurse practitioners than to conventional nurses. Except for remuneration (affected by legal constraints) job satisfaction among experimental physicians and nurses remained high after one year of experience with the new method.

Attitude of Health Personnel↗

Nurse practitioners in primary care. I. The McMaster University educational program.

In 1971 McMaster University offered an educational program for nurse practitioners sponsored jointly by the Faculty of Medicine and the School of Nursing. Priority in the pilot program was given to nurses employed in family practice settings and to those participating in related McMaster studies. Because of the implications of a change in role for both nurse and physician, one requirement for acceptance of a nurse in the program was participation of the physician-associate in the educational program.The program prepares registered nurses to extend their responsibilities in primary health care activities for the assessment and management of patients in family practice. The current evaluations of the pilot-study results suggest that such programs can contribute effective resources towards meeting expectations of ready access to primary care by the people of Canada.

Comprehensive Health Care↗

Nurse practitioners in primary care. II. Prior attitudes of a rural population.

A household survey in a medically underserviced rural population of south-central Ontario was conducted in early 1971 to ascertain attitudes about nurses as providers of primary care. The population sampled had not been exposed to nurse practitioners or family practice nurses before the survey was concluded. The results demonstrate favourable views about nurses giving services in health maintenance and sickness surveillance situations. Personal primary care rendered in homes was highly acceptable to respondents. Physician services were preferred in worry-inducing situations.

Attitude↗

The aftermath of a pill scare: regression to reassurance.

In October 1995, following confidential exchanges of findings among investigators in several epidemiological studies, the UK Medicines Control Agency sent a 'Dear Doctor' letter to all clinical practitioners in the country. The letter alerted them to the possibility of an excess risk of venous thromboembolism among women taking combined oral contraceptives (OC) with the 'newer' progestins, notably desogestrel and gestodene. The communication provoked a major pill scare, not just in the United Kingdom but in other countries. The preliminary and unpublished findings from the four initial 1995-96 studies reported odds ratios (OR) ranging from 1.5 to 23 in the point estimates. These are very low relative risks but were communicated in a way that the public perceived as a 'doubling of the risks'. In the 3 years since the pill scare, additional research has been done. First, deliberate and careful analysis of some of the studies and replication of others have shown that the epidemiological investigations were affected by unavoidable systematic error. Three types of bias were demonstrated empirically, namely, prescription bias, referral bias and healthy user effect or attrition of susceptibles. All those biases would tend to drive OR spuriously upwards. Additional epidemiological studies have progressively shown lower ORs, some of them under the threshold of 1.0, i.e. 'no association'. Two major consensus assessments, one carried out by a World Health Organization Scientific Group and another undertaken by the International Federation of Fertility Societies, both attach little importance to differences between older (second generation) combined OC and newer ones (third generation). This paper is a synthesis of all published evidence since October 1995, at the time of the pill scare and in the 3 years since. In conclusion, all combined oral contraceptive pills are equally safe.

Cardiovascular Diseases↗

1965-1990: 25th anniversary of nurse practitioners. A classic manuscript reprinted in celebration of 25 years of progress. The Burlington randomized trial of the nurse practitioner. 1971-2.

From July 1971, to July 1972, in a large suburban Ontario practice of two family physicians, a randomized controlled trial was conducted to assess the effects of substituting nurse practitioners for physicians in primary-care practice. Before and after the trial, the health status of patients who received conventional care from family physicians was compared with the status of those who received care mainly from nurse practitioners. Both groups of patients had a similar mortality experience, and no differences were found in in physical functional capacity, social function or emotional function. The quality of care rendered to the two groups seemed similar, as assessed by a quantitative "indicator-condition" approach. Satisfaction was high among both patients and professional personnel. Although cost effective from society's point of view, the new method of primary care was not financially profitable to doctors because of current restrictions on reimbursement for the nurse-practitioner services.

Consumer Behavior↗

Are wireless phones safe? A review of the issue.

Most wireless phones and their corresponding base stations operate at a very low power output and in the radiofrequency range of 800 to 2000 Megahertz. Current international guidelines protect against thermal biological effects in terms of the local or whole-body specific absorption rate (SAR). Potential non-thermal bio-effects resulting from the use of wireless phones are not established and laboratory (i.e., in vitro, in vivo) studies have shown conflicting results. Epidemiological studies of potential human health effects are few but are expected to emerge in the near future. Challenges to epidemiological research include difficult exposure assessment, selection of appropriate controls, potential confounding bias, and validation of outcome. Scientists, community advocacy groups, and public health professionals must be equipped to critically analyze the emerging evidence within a benefit/risk assessment framework.

Environmental Exposure↗

Risk of fatal and near-fatal asthma in relation to inhaled corticosteroid use.

OBJECTIVE: To examine the relationship between patterns of use of inhaled beclomethasone dipropionate and the risk of fatal and near-fatal asthma. DESIGN: Nested case-control analysis of a historical cohort; a further analysis. SETTING: The 12,301 residents of Saskatchewan aged 5 to 54 years who were dispensed 10 or more asthma drugs from 1978 to 1987. PATIENTS: The 129 persons who experienced asthma death (n = 44) and near-death (n = 85) and their 655 controls matched as to age and date of entry into the cohort, with the additional matching criteria of at least one hospitalization for asthma in the prior 2 years, region of residence, and having received social assistance. MAIN OUTCOME: Life-threatening attacks of asthma defined as death due to asthma or the occurrence of hypercarbia, intubation, and mechanical ventilation during an acute attack of asthma. RESULTS: After accounting for the risk associated with use of other medications and adjustment for markers of risk of adverse events related to asthma, subjects who had been dispensed, on average, one or more metered-dose inhalers of beclomethasone per month over a 1-year period had a significantly lower risk of fatal and near-fatal asthma (odds ratio, 0.1; 95% confidence interval, 0.02 to 0.6). CONCLUSION: These data support recent guidelines from several countries that recommend the use of inhaled corticosteroids in moderate and severe asthma.

Administration, Inhalation↗

A study of mortality near sour gas refineries in southwest Alberta: an epidemic unrevealed.

Concerns about excesses in a wide array of adverse health outcomes have been expressed for over 25 years by a rural population in southwestern Alberta, living downwind from natural gas refineries. Among these has been the perception that deaths have occurred more frequently than ought to have been expected. As part of a large field epidemiologic study undertaken during the summer of 1985 to investigate possible health effects in this area, a residential cohort study was carried out to study mortality. The cohort was defined as all those individuals who resided in the area in 1970. A total of 30,175 person-years of risk within Alberta were experienced by this cohort during 1970-84. The deaths during this period were enumerated by resident reports and by manual record linkage with the death records of the Alberta Bureau of Vital Statistics. Age- and sex-standardized mortality ratios, based on expected rates from 2 pre-specified demographically similar, non-metropolitan Southern Alberta populations, were 0.88 and 0.84 respectively, neither of which was significantly different from unity. These data cannot address the question of etiology but they can do much to allay the anxieties of a community convinced it had experienced an epidemic of death.

Adult↗