The Canadian Asthma Committee set up a working group in 1999 to disseminate and encourage the implementation of the CACG (1). This working group was created because of the belief that despite publication of guidelines, there was a failure to use them. This was demonstrated by the Asthma in Canada study showing that the previous guidelines, published in 1996 (2) – for which there had been no activities surrounding dissemination – had not significantly affected clinical practice. The study found that only 24% of patients met all six of the symptom-based criteria used to gauge control of the disease, and fully 57% failed to meet two or more of the six control measures (3). Furthermore, 51% of patients required urgent care for out-of-control asthma in the previous year. Only 54% of patients recalled ever having lung function tests, and many did not understand how to properly use their medications. Despite this, 91% of patients believed their asthma was adequately controlled. Of even greater concern, 77% of family physicians and 90% of respirologists thought that their asthmatic patients’ symptoms were well controlled. Moreover, few physicians gauged asthma control by tracking more than one or two symptoms.
The dissemination working group, following publication of the guidelines in the Canadian Medical Association Journal, undertook a number of activities that included:
Publication of a number of companion articles about the importance of the new guidelines in Canadian medical journals read by primary health care professionals;
Mailing of copies of the guidelines to government officials, medical students and any other individuals who requested them;
A series of four one-page direct mailings to general practitioners highlighting important points and containing tools to aid in the implementation of the guidelines, along with the address for an asthma information Web site;
Setting up an asthma information Web site that incorporates links to the guidelines, tools for implementation, asthma information, asthma educational materials and other elements;
Educational activities supported by pharmaceutical companies and nongovernmental organizations; and
A survey of general practitioners regarding their familiarity with the guidelines, and the use of the mailed tools and Web site.
The two-year budget for all of these activities was approximately $280,000, of which approximately 25% went to administration. The remainder was used for the development of tools and for direct mailing. Unfortunately, this sum prevented both the evaluation of these activities and any public education.
To enhance awareness of the new guidelines, Canada’s medical media were contacted and provided with a press release. This led to the guidelines being used or mentioned in over 38 different journals, periodicals and bulletins directed at health care professionals, including family physicians, nurses, pharmacists and others. These included French and English publications, society newsletters and journals.
In addition, more than 6000 copies of the CACG were mailed after their publication in the Canadian Medical Association Journal. Three thousand of the copies were sent to francophone physicians, because this constituency often does not read the Canadian Medical Association Journal. Another 1500 copies were distributed to third-year medical students across Canada. Most of the remaining copies were sent to individuals who requested them and to officials in the provincial governments across the country, including the ministers and deputy ministers of health.
Four waves of mailings were sent personally from high-profile regional specialists to 12,000 high-prescribing family physicians. The mailings were staggered over two years as a method of providing physicians with regular reminders about the CACG. Each mailing included a short text. The text in the first mailing focused on diagnosis, the second on the use of ICS, the third on the use of long-acting beta-agonists and antileukotrienes as additional therapy, and the fourth on the role of asthma education and environmental control. Each text also included the address of the asthma information Web site <www.asthmaguidelines.com>. The Web site received more than 438,000 visits, and many of the visitors downloaded materials from the Web site.
There was also a user-friendly, leave-behind tool in each mailing. The first mailing contained a mouse pad on which was printed a figure outlining the recommended order of drug utilization in asthma. The second mailing contained a pocket slide rule with normal values for adult peak flow measurements, along with an ICS dose equivalent reminder that consisted of a list of the various ICS and their respective potencies. The third mailing contained two bilingual tear-off pads. One of the pads had an asthma treatment checklist for physicians to assess asthma control, and the other had an asthma-treatment flow chart. The fourth mailing included two sample asthma action plans, along with a number of stickers for patients’ charts to assess the level of control.
The fourth and final mailing also contained a survey. Only 207 of 12,000 surveys were returned, despite respondents being automatically entered in a draw for a Palm Pilot. Ninety-three per cent of respondents indicated that they were familiar with the contents of the guidelines. One-third of respondents indicated they had read the full document and 49% said that they had only read the summary. Furthermore, 82% suggested that they found the guidelines helpful.
Regarding the content of the mailings with leave-behinds, 26% of respondents said that they had visited the asthma information Web site, 24% indicated that they had used the pocket slide rule with the peak flow normal values and the ICS dose equivalent reminder, while 36% had used the asthma-treatment checklist or flow chart. Twenty-nine per cent said that they had used the ‘level of control’ stickers. When the physicians were asked about the usefulness of each of these tools, their responses indicated that the tear-off pads with the asthma-treatment checklist and flow chart were the most useful, and that the slide rule was the next most useful.
A number of educational activities surrounding the guidelines were conducted by pharmaceutical companies in the form of lectures, evening symposia and workshops. Industry also developed a number of materials for physicians to reinforce some of the guideline recommendations. Furthermore, nongovernmental agencies, including the Allergy/Asthma Information Association, the Asthma Society of Canada, the Canadian Network for Asthma Care and lung associations, tried to increase the awareness of the guidelines among their constituencies through their regular communications.
RESULTS
It appears that more work must be conducted in developing an effective strategy for implementing asthma guidelines –asthma is still not well controlled. One part of the challenge is the consistently low level of control of asthmatic symptoms. A recent telephone survey of 463 physicians and 893 adult patients suggested that 89% of the patients had experienced asthma worsening in the previous year (4). Furthermore, 39% of patients reported urgent visits to their family physicians for asthma and 17% visited an emergency department in the previous year. Fully 97% of patients said that their asthma was well controlled, but 53% were considered uncontrolled according to the CACG criteria (5). Furthermore, despite the CACG encouraging the use of asthma written action plans, only 22% of the physicians said that they provide these to their patients (4).
Another part of the challenge is the misidentification of asthma, which leads to both significant over- and under-diagnosis of the disease. For example, one study (6) indicated that of 90 patients labelled by physicians as having asthma, 37 (41%) showed no evidence of air flow obstruction and had a negative methacholine challenge test. Furthermore, 23 (62%) of these patients were using medication for the treatment of asthma. The study also revealed that only 52% of the diagnosed asthmatic patients recalled ever having been tested with spirometry. It is well known that objective measurements are not used by primary care physicians, which can lead to an overdiagnosis, underdiagnosis or underappreciation of the severity of asthma.
Despite the above data, we believe the efforts surrounding implementation of the 1999 guidelines were not evaluated in a manner appropriate for the drawing of conclusions. Yet, it does appear that they had minimal impact.
These findings underline the importance of educating not only physicians, but also patients about asthma and the control of symptoms. More emphasis could be placed on asthma education for patients, including by specially trained community pharmacists (7) or other asthma educators. Newer methods of changing physician behaviour, such as the use of handheld devices (8) and treatment protocols (9), also need to be assessed.
SUMMARY
Further research is clearly required to develop and validate models to improve implementation and dissemination of guidelines. It is likely that such models will comprise both existing approaches and new strategies, along with the resources necessary to facilitate change. Furthermore, the effectiveness of the models must be scientifically evaluated using proper methods.
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