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Biomedical subjects

R Blais

Publications and source records attributed to R Blais.

At least 19 recordsLinked to original sources
PubMed2005

Physicians' attitudes to the pharmacological treatment of patients with stable angina pectoris.

BACKGROUND: Little is known about how physicians' knowledge of and attitudes to practice guidelines for stable angina may influence their implementation. AIM: To explore the association between physicians' demographics, their knowledge, and opinions about stable angina and their self-reported adherence to guideline recommendations. DESIGN: Questionnaire-based survey. METHODS: We surveyed 1228 Quebec physicians using a questionnaire based on the 'awareness-to-adherence' conceptual framework to measure their adherence with recommendations for the pharmacological treatment of stable angina. Independent predictors of adherence with the targeted recommendations were determined by stepwise linear regression analysis. RESULTS: We received 877 (71.4%) responses from the 1228 eligible physicians. More than 90% of respondents were aware of and agreed with the targeted recommendations. However, the adoption rate varied, even among physicians who generally agreed with the guidelines. Factor analysis indicated that most physicians agreed with recommendations concerning ASA. More negative attitudes were expressed toward beta-blockers and hypolipaemic drugs. Respondents trusted the recommendations of a variety of scientific and professional organizations. Awareness, agreement, and adoption were the strongest predictors of adherence for the three recommendations. Physician demographics and practice characteristics did not predict adherence. DISCUSSION: Physicians were aware of and agreed with the recommendations, so additional large-scale dissemination of the guidelines would be unlikely to improve prescription patterns. However, negative attitudes about beta-blockers and hypolipaemic therapy affected adherence to recommendations for these drugs. Continuing medical education interventions involving local opinion leaders might address some of the obstacles identified.

Adrenergic beta-Antagonists↗
PubMed2004

[Could we trust clinical statistics from data banks of the National Health Service (NHS)?].

Can we accept the statistics provided by the Ministry of Health, which uses large computerized databases? Through MEDECHO, the Ministry provides to hospital managers, reports cards on different interventions. These reports compare different hospitals performances. Surgeons involved in the process hesitate to accept this information. Using the results of the performance of cholecystectomy provided by this system (Gr: A), we compared the same cohort (1 April-31 December 1996 = 346 cholecystectomies) but using specific criteria determined as relevant to our surgeons (Gr: B). The rate of complication gives a crude aftermath and no attempt was used to adjust for severity. The MEDECHO data are adjusted for severity. The global rate of complications is similar Gr: A 11%, Gr: B 12%. Major complication rate for pulmonary embolism, hemorrhage and biliary duct trauma are identical. The rate of surgical site infection is higher in Gr: B (5% vs. 2%). The patients are seen in the outpatient clinic and these observations are not included by the analytical system unless the patient has been readmitted. For our hospital, the MEDECHO data are valid and reliable even though they underestimated the wound infection rate. These results could be explained by an appropriate interpretation of the code system by the archivist and by the surgeons' precision to complete the summary sheet of hospitalization. We can conclude that these data can be used as a means to evaluate the quality of outcome of a surgical service.

Canada↗
PubMed2004

Drug treatment of stable angina pectoris and mass dissemination of therapeutic guidelines: a randomized controlled trial.

BACKGROUND: Public agencies responsible for implementing health care policies often adapt and disseminate clinical practice guidelines, but the effectiveness of mass dissemination of guidelines is unknown. AIM: To study the effects of guideline dissemination on physicians' prescribing practices for the treatment of stable angina pectoris. DESIGN: Randomized controlled trial. METHODS: A sample of 3293 Quebec physicians were randomly assigned to receive a one-page summary of clinical practice guidelines on the treatment of stable angina (in February 1999), to receive the summary and a reminder (in February and March 1999, respectively), or to receive no intervention (controls). The prescribing profiles of participants, as well as sociodemographic characteristics of the physicians and their patients, were examined for June-December 1999. RESULTS: The intervention had no effect on prescription rates of beta-blockers, antiplatelet agents, or hypolipaemic drugs. Compared to 1997 data for the same physicians, there was an overall 10% increase in appropriate prescription rates, irrespective of the intervention. DISCUSSION: In-house production and dissemination of clinical practice guidelines may not improve physicians' practice patterns if there is pre-existing substantial scientific consensus on the issue.

Adrenergic beta-Antagonists↗
PubMed2001

Are patients suffering from stable angina receiving optimal medical treatment?

There is good evidence for the use of antiplatelet, beta-blocker and lipid-lowering drugs in the treatment of ischaemic heart disease, but few data on how these medications are used in treating stable angina pectoris. We examined prescription profiles for a sample of patients aged > or =65 years with stable angina, to compare the profiles to local guidelines and to explore the determinants of these profiles, in a cross-sectional study. We identified 11 141 individuals from the Quebec provincial out-patient pharmaceutical database for the period 1 June 1996 to 31 May 1997, and examined the percentage of these patients with and without associated co-morbidities receiving antiplatelet, beta-blocker and lipid-lowering medications. We used hierarchical modelling to examine the role of patient and physician characteristics in explaining the variation in the use of these medications. Calcium-channel blockers were the class of anti-ischaemic drugs most prescribed (63%). Beta-blockers were prescribed in 52.1% of patients. Antiplatelet and lipid-lowering drugs were prescribed to 56.8% and 32.6%, respectively. Increasing age and female gender made patients less likely to be prescribed these treatments. General practitioners were less likely than cardiologists to prescribe beta-blockers and lipid-lowering drugs (OR 0.79, CI 95% 0.68-0.91 and OR 0.77, CI 95% 0.66-0.91, respectively). There is a general under-use of antiplatelet, beta-blocker and lipid-lowering medications in the treatment of stable angina pectoris patients, possibly leading to adverse patient outcomes.

Adrenergic beta-Antagonists↗
PubMed2001

Ambulatory use of inhaled beta(2)-agonists for the treatment of asthma in Quebec : a population-based utilization review.

STUDY OBJECTIVES: To assess whether the utilization of inhaled short-acting beta(2)-agonists (ISAB) and inhaled long-acting beta(2)-agonists (ILAB) for the treatment of asthma was appropriate according to the 1996 Canadian Asthma Consensus Conference recommendations. DESIGN: Population-based retrospective drug utilization review using pharmacists' billing data of the Prescription Drug Insurance Plan administered by the Quebec health insurance board. However, the database used did not contain complete patient clinical information to accurately assess severity of asthma. SETTING: Province of Quebec, Canada. PATIENTS: Persons who received at least one outpatient prescription of ISAB (age range, 5 to 45 years) or ILAB (age range, 12 to 45 years) for the treatment of asthma between August 1997 and April 1998. MEASUREMENTS: Percentages of patients whose use was appropriate according to three criteria regarding the average daily dose of ISAB (criterion 1), the renewal interval of ILAB (criterion 2), and the concomitant daily use of corticosteroids for the expected length of utilization of ILAB (criterion 3). RESULTS: Overall proportions of appropriate use according to criterion 1 were as follows: 75% (without inhaled corticosteroids [ICS]) and 84% and 43% (with one or more than one prescription of ICS, respectively). Appropriateness was slightly higher for female patients, younger patients (5 to 18 years old), and those treated by pediatricians. However, appropriateness was only 9% among patients who received at least two prescriptions of ISAB during the study period. The proportion of appropriate use was 19% according to criterion 2 and 15% according to criterion 3; there were few differences by gender or by age, but the appropriateness according to criterion 2 was somewhat higher for patients of respirologists. CONCLUSION: Compared to the 1996 Canadian asthma consensus conference recommendations, ISAB are overused, ICS are underused, and ILAB are often used improperly. Close collaboration between health professionals and patients is essential to improve the pharmacotherapy of asthma.

Administration, Inhalation↗
PubMed2000

A variable speed translating couch technique for total body irradiation.

We have developed a variable speed translating patient couch system for the delivery of total body irradiation (TBI). For a whole body Rando-type phantom, dose variation at mid-plane relative to the prescription point (navel) can be as high as 15% (neck or legs) with a constant velocity. By taking into account variations in body thickness, the intensity modulation radiation therapy, resulting from variable velocities, effectively delivers a uniform dose distribution at mid plane. The couch control user interface, technical aspects and dose planning optimization procedure for determining velocity distribution are described.

Biophysical Phenomena↗
PubMed1999

Do ethnic groups use health services like the majority of the population? A study from Quebec, Canada.

The purpose of this study was to compare the use of medical services over a period of one year by members of ethnic groups and native Quebecers in Canada, while controlling for a number of confounding factors. The objective was to determine whether the two groups made the same number of medical visits to the same sites (private offices, outpatient clinic and emergency room and hospital inpatient care) and the same types of physicians (general practitioners, specialists). Two sources of data were used. The first was the Quebec Health Survey conducted in 1987 on a representative sample of 31,995 noninstitutionalized persons. Through personal interviews and self-administered questionnaires, data were collected on the demographic characteristics and health status of the respondents. The second source of data was the Quebec physician claims database, which contains a complete registry of services paid to physicians on a fee for service basis in the 12 months prior to the survey. The two databases were linked at the individual level (success rate is 88%). Members of ethnic groups aged 15 years and older were then individually matched to native Quebecers having the same six characteristics (age, gender, household income, access to health care facilities, perceived health and overall health). Final sample size was 1182 (divided equally into the two study groups). Results showed that neither the average number of medical services used over a year by the two groups nor the number of users differed. However, ethnic groups made more visits to specialists in private offices. Although not definite, possible explanations of these results are discussed. It is concluded that health care professionals should be sensitive to the particular needs of ethnic groups in order to provide them with accessible and appropriate services.

Adolescent↗
PubMed1996

A survey of midwives in Quebec: what are their similarities and differences?

BACKGROUND: Until recently, Canada was the only industrialized country that had not legalized midwifery. In the province of Quebec the government adopted a law to evaluate midwifery in eight pilot projects before generalizing the practice. This study examined the similarities and differences among midwives in Quebec. METHODS: Using data from a 1991 mail survey, we compared 31 nurse-midwives, 12 professional midwives, and 27 lay midwives to assess professional background and opinions about selected maternity care issues and aspects of future midwifery practice, such as midwife training options, responsibilities, setting for midwifery care, relationship to other maternity caregivers, autonomy, and control over their profession. RESULTS: Midwives largely shared the same philosophy of care but had different viewpoints on two main professional aspects: compared with professional midwives and nurse-midwives, lay midwives preferred to deliver antepartum, intrapartum, and postpartum care at a client's home or an independent birthing center; like professional midwives, they rejected nursing as a prerequisite to midwifery training. Other interrelated personal, social, political, and legal factors were also associated with different beliefs. CONCLUSIONS: Despite the differences among the three groups, the process under way in Canada is to recognize a single profession of midwife. Creating a unified profession is a challenge that Canadian midwives with different backgrounds face in the 1990s.

Health Knowledge, Attitudes, Practice↗
PubMed1995

Acute pulmonary toxicity linked to use of a leather protector.

Leather protectors are used extensively for waterproofing leather garments. Inhalation exposure to this type of product is usually considered a benign incident. We report two cases of acute pulmonary toxicity associated with the use of a new leather protector recently introduced to the Canadian market. Emergency physicians must be aware of the potential acute toxicity of new leather protectors.

Adolescent↗
PubMed1994

Midwifery defined by physicians, nurses and midwives: the birth of a consensus?

OBJECTIVE: To describe the form of midwifery practice preferred by physicians practising obstetrics, nurses providing maternity care and midwives. DESIGN: Mail survey conducted in 1991. SETTING: Province of Quebec. PARTICIPANTS: A systematic random sample of 844 physicians, 808 nurses and 92 midwives; 597, 723 and 92 respectively completed the questionnaire, for an overall response rate of 80%. MAIN OUTCOME MEASURES: Midwife training options, range of responsibilities, location of midwifery care, relationship to other maternity care providers and degree of autonomy. RESULTS: Most of the physicians, nurses and midwives surveyed agreed that if midwifery was legalized, midwives should have a university degree, provide basic care to women with normal pregnancy and delivery, provide prenatal and postnatal care in hospitals and community health centres, perform delivery in hospitals and work in close collaboration with the other maternity care professionals. Disagreement existed concerning the level of university training required, the need for training in nursing first, the scope of medical intervention performed by midwives, out-of-hospital delivery, the autonomy of midwives and control over their practice. CONCLUSION: Some consensus on midwifery practice exists between physicians, nurses and midwives. In jurisdictions where opposition to midwives is strong, such consensus could serve as the starting point for the introduction of midwifery.

Attitude of Health Personnel↗
PubMed1994

Controversies in maternity care: where do physicians, nurses, and midwives stand?

Through a mail survey in 1991, we compared the opinions of 597 physicians practicing obstetrics, 723 maternity care nurses, and 70 midwives from the province of Quebec, Canada, about selected maternity care issues, including the practice of midwifery. Results showed that divergent points of view existed between and within the three groups on many maternity care issues. Physicians were more divided over the routine use of obstetric intervention than the approach to care or their opinion about midwives. Midwives held more client-centered and less interventionist attitudes than nurses or physicians. Nurses were much more open to midwives than physicians, but 20 to 30 percent of physicians saw some advantages in legalizing the practice of midwifery. Physicians and nurses generally considered midwives as a greater professional threat to the other group than to themselves. The fact that many physicians were critical of current maternity care is difficult to reconcile with their general opposition to midwives. How and to what extent physicians will respond to women's desire for more humanized and less interventionist care remains an open question. Given the problems facing maternity care in North America, expanding midwifery services is an alternative to examine seriously.

Attitude of Health Personnel↗
PubMed1993

Variations in surgical rates in Quebec: does access to teaching hospitals make a difference?

OBJECTIVE: To document the geographic variations in the rates of 10 common surgical procedures in Quebec and to examine the relation between surgical rates and level of access to teaching hospitals. DESIGN: Population-based rates standardized for age and sex were calculated from 1985-88 data from MED-ECHO (the provincial hospital discharge database) for each of the 32 community health districts (départements de santé communautaire [DSCs]) in Quebec. Variation across DSCs was analysed with the use of the ratio of the highest to the lowest rate, the coefficient of variation and the systematic component of variation. On the basis of an urbanization index designed by Statistics Canada, DSCs were classified as having a low, medium, high or very high level of access to teaching hospitals. PATIENTS: All Quebec residents except those whose DSC of residence could not be traced (accounting for no more than 1.7% of patients for any study procedure) and aboriginal people from northern Quebec. SURGICAL PROCEDURES STUDIED: Appendectomy, cesarean section, cholecystectomy, coronary artery bypass grafting (CABG), hysterectomy, inguinal hernia repair, prostatectomy, tonsillectomy with or without adenoidectomy, total hip replacement and varicose vein stripping. RESULTS: There was considerable systematic variation in the surgical rates for all 10 procedures. Cesarean section, the rates of which varied the least, still exhibited almost a twofold variation between the highest and lowest rates. The rates of tonsillectomy varied the most, by a factor of more than five. With a few exceptions there was relatively little relation between the rates of the procedures within the DSCs. The rates of appendectomy, cholecystectomy, hysterectomy and tonsillectomy tended to be lower in the DSCs containing teaching hospitals, whereas the reverse was true for CABG. For the other procedures the relation between the rates and the level of access to teaching hospitals was nonsignificant. CONCLUSIONS: The overall consistency of the observed variations with those of previous studies invites a closer look at the practice patterns and the scientific basis of the clinical decisions associated with procedures showing high variations in rates. The lack of a systematic relation between the surgical rates and the level of access to teaching hospitals challenges the belief that remote regions are underserved with respect to the procedures studied.

Female↗
PubMed1993

Vapors from collodion and acetone in an EEG laboratory.

In the many EEG laboratories, the collodion-acetone technique has lost favor because of offensive vapors. We measured vapor concentrations of diethyl ether and acetone, the two principal vapors from this technique, to determine whether they reached toxic levels. We found that diethyl ether vapors usually reached the olfactory threshold, but acetone concentration did not. Neither reached concentrations that were systemically toxic. We then developed an inexpensive, effective method of reducing concentrated vapors during electrode application and removal and documented a significant reduction in vapor concentrations. With this information and with an inexpensive, "in house" vapor extraction system, technologist and patient satisfaction with the collodion method should greatly improve.

Acetone↗
PubMed1993

Factors influencing the practice of vaginal birth after cesarean section.

OBJECTIVES: Vaginal birth after cesarean has been recommended for most women with previous cesarean sections for the past 10 years. This practice, however, has not yet been generalized because high variations can still be observed among countries, hospitals, and physicians. METHODS: A case-control study involving 635 case patients and 2593 control patients was carried out to determine which characteristics of the physician, the patient, or the hospital were important in the adoption of this practice. RESULTS: The results of the multiple stepwise logistic regression analysis indicate a higher likelihood that women will experience vaginal birth after cesarean if their physicians had cesarean rates under 20%, had less than 5% of their patients considered at risk, and were younger than 54 years old. Vaginal birth after cesarean was also favored by hospitals characterized by a high degree of neonatal and obstetrical specialization, and a patient population with a low level of education. CONCLUSIONS: This policy is still in the developmental stage, as evidenced by the great variability between hospitals and physicians in rates of vaginal birth after cesarean. Further efforts are required for this policy to become the norm.

Adult↗
PubMed1991

Using administrative data bases for technology assessment in health care. Results of an international survey.

This study assesses the nature, use, and quality of large administrative data bases available in different countries for technology assessment in health care. Using postal questionnaires, data were collected describing 91 data bases from 15 countries. Current uses are promising, but more efforts are needed if the full potential of administrative data files is to be tapped.

Databases, Factual↗
PubMed1991

Prostatectomy in Denmark. Regional variation and the diffusion of medical technology 1977-1985.

In many countries prostatectomy is one of the most common surgical operations in elderly men. We used administrative data for the entire male population of Denmark to study temporal and regional variations in the use of prostatectomy from 1977 to 1985. The total annual number of prostatectomies increased by 43% during the period, when the transurethral procedure (TURP) gradually replaced traditional open surgery. TURP accounted for 56% of all operations in 1977 but increased its share to 92% in 1985. Substantial regional variations occurred with index values for prostatectomy in 72 recruitment areas ranging from 0.56 to 1.62 (SCV x 100 = 5.3). The amount of variation decreased during the process of technology diffusion, but remained at a relatively high level (as in other countries) even after the process had been completed (SCV x 100 = 5.1).

Denmark↗
PubMed1990

Effects of patient, physician and hospital characteristics on the likelihood of vaginal birth after previous cesarean section in Quebec.

Repeat cesarean section is a major factor contributing to the rising cesarean section rate. Although vaginal birth after a previous cesarean section (VBAC) is advocated in most cases, it has not yet been adopted as widespread policy. In a case-control study we compared 400 women in Quebec who underwent VBAC with 1600 women who had a repeat cesarean section from 1985 to 1987 in an attempt to identify factors that favour vaginal delivery. Using both simple and multiple logistic regression analyses we examined the effect of independent variables linked to the patients (two variables), the attending physicians (seven) and the hospitals (two) on the dependent variable (type of birth) with the use of odds ratios. We found that the physician characteristics related to type of practice and the degree of hospital specialization were significant factors in predicting the type of delivery. Women who gave birth vaginally were more likely than those who had a repeat cesarean section to be attended by a physician with a specialized practice and to give birth in a hospital providing an intermediate or high level of care. This suggests that VBAC is still perceived as a high-risk option and is managed by only a minority of specialized obstetricians.

Adult↗