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Research

Training family physicians in shared decision-making to reduce the overuse of antibiotics in acute respiratory infections: a cluster randomized trial

France Légaré, Michel Labrecque, Michel Cauchon, Josette Castel, Stéphane Turcotte and Jeremy Grimshaw
CMAJ September 18, 2012 184 (13) E726-E734; DOI: https://doi.org/10.1503/cmaj.120568
France Légaré
From the Research Centre of the Centre Hospitalier Universitaire de Québec (Légaré, Labrecque, Turcotte); the Department of Family Medicine and Emergency Medicine (Légaré, Labrecque, Cauchon, Castel), Université Laval, Québec, Que; and the Ottawa Health Research Institute (Grimshaw), Ottawa, Ont.
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  • For correspondence: france.legare@mfa.ulaval.ca
Michel Labrecque
From the Research Centre of the Centre Hospitalier Universitaire de Québec (Légaré, Labrecque, Turcotte); the Department of Family Medicine and Emergency Medicine (Légaré, Labrecque, Cauchon, Castel), Université Laval, Québec, Que; and the Ottawa Health Research Institute (Grimshaw), Ottawa, Ont.
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Michel Cauchon
From the Research Centre of the Centre Hospitalier Universitaire de Québec (Légaré, Labrecque, Turcotte); the Department of Family Medicine and Emergency Medicine (Légaré, Labrecque, Cauchon, Castel), Université Laval, Québec, Que; and the Ottawa Health Research Institute (Grimshaw), Ottawa, Ont.
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Josette Castel
From the Research Centre of the Centre Hospitalier Universitaire de Québec (Légaré, Labrecque, Turcotte); the Department of Family Medicine and Emergency Medicine (Légaré, Labrecque, Cauchon, Castel), Université Laval, Québec, Que; and the Ottawa Health Research Institute (Grimshaw), Ottawa, Ont.
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Stéphane Turcotte
From the Research Centre of the Centre Hospitalier Universitaire de Québec (Légaré, Labrecque, Turcotte); the Department of Family Medicine and Emergency Medicine (Légaré, Labrecque, Cauchon, Castel), Université Laval, Québec, Que; and the Ottawa Health Research Institute (Grimshaw), Ottawa, Ont.
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Jeremy Grimshaw
From the Research Centre of the Centre Hospitalier Universitaire de Québec (Légaré, Labrecque, Turcotte); the Department of Family Medicine and Emergency Medicine (Légaré, Labrecque, Cauchon, Castel), Université Laval, Québec, Que; and the Ottawa Health Research Institute (Grimshaw), Ottawa, Ont.
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Abstract

Background: Few interventions have proven effective in reducing the overuse of antibiotics for acute respiratory infections. We evaluated the effect of DECISION+2, a shared decision-making training program, on the percentage of patients who decided to take antibiotics after consultation with a physician or resident.

Methods: We performed a randomized trial, clustered at the level of family practice teaching unit, with 2 study arms: DECISION+2 and control. The DECISION+2 training program included a 2-hour online tutorial followed by a 2-hour interactive seminar about shared decision-making. The primary outcome was the proportion of patients who decided to use antibiotics immediately after consultation. We also recorded patients’ perception that shared decision-making had occurred. Two weeks after the initial consultation, we assessed patients’ adherence to the decision, repeat consultation, decisional regret and quality of life.

Results: We compared outcomes among 181 patients who consulted 77 physicians in 5 family practice teaching units in the DECISION+2 group, and 178 patients who consulted 72 physicians in 4 family practice teaching units in the control group. The percentage of patients who decided to use antibiotics after consultation was 52.2% in the control group and 27.2% in the DECISION+2 group (absolute difference 25.0%, adjusted relative risk 0.48, 95% confidence interval 0.34–0.68). DECISION+2 was associated with patients taking a more active role in decision-making (Z = 3.9, p < 0.001). Patient outcomes 2 weeks after consultation were similar in both groups.

Interpretation: The shared decision-making program DECISION+2 enhanced patient participation in decision-making and led to fewer patients deciding to use antibiotics for acute respiratory infections. This reduction did not have a negative effect on patient outcomes 2 weeks after consultation.

ClinicalTrials.gov trial register no. NCT01116076.

Despite recent efforts to decrease the use of antibiotics for acute respiratory infections, their prescription is still too frequent1,2 and may be contributing to antibiotic resistance.1 Only 6%–18% of children with acute respiratory infections, 5%–15% of adults with pharyngitis and 38% of adults with acute rhinosinusitis have bacterial infections.3,4 Studies investigating improvement in clinical decision-making about the use of antibiotics for acute respiratory infections have been inconclusive, and interventions to reduce their use have shown only moderate success.5 In the shared decision-making model, a health care professional and the patient make a decision together based on the best available evidence and the patient’s values and preferences.6 Shared decision-making is recognized as an effective strategy for reducing the overuse of treatment options not clearly associated with benefits for all patients.7

In a randomized pilot trial, we showed that an earlier version of the training program in shared decision-making (DECISION+) reduced the proportion of patients who decided to use antibiotics immediately after consulting for acute respiratory infections (control 49%, DECISION+ 33%; absolute difference 16%; p = 0.08), a reduction that was maintained 6 months later.8 However, because only 46% of enrolled providers in the pilot trial participated in all three 3-hour workshops, we improved the training program before conducting a definitive trial.9 Following an in-depth evaluation with participants in the pilot trial,10,11 we modified the training program and renamed it DECISION+2. In the current study, we evaluated its effect on the proportion of patients who decided to use antibiotics for acute respiratory infections after physician consultation.

Methods

The results from our pilot trial (NCT00354315) and protocol for this trial (NCT01116076) have been published.8–12 The current study was a multicentre, parallel cluster randomized trial conducted in a network of the 12 family practice teaching units (unit of randomization) affiliated with the Department of Family Medicine and Emergency Medicine at Université Laval in 6 regions of Quebec. The trial had 2 arms and was conducted in 3 phases (Figure 1): baseline data collection (family physician and patient recruitment, July through October 2010); intervention (DECISION+2, November 2010); and postintervention data collection (patient recruitment, November 2010 through April 2011).

Figure 1:
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Figure 1:

Flow diagram of the DECISION+2 trial. In the DECISION+2 group, 11 of the 189 eligible physicians who were not available during the first phase of patient recruitment were recruited (completed the baseline questionnaire) after DECISION+2 training began and therefore were not included in the final analysis. Out of 162 (151 + 11), 103 completed both the online tutorial and the interactive workshop, 16 completed only the interactive workshop, 15 completed only the online tutorial, and 28 completed none of the training components. Thus, 72.8% (118/162) completed the online tutorial, and 73.5% (119/162) completed the interactive workshop. In the control group, 9 of the 144 eligible physicians who were not available during the first phase of patient recruitment were recruited (completed the baseline questionnaire) after DECISION+2 training began; these physicians were included in the follow-up.

The Institutional Review Boards of the Centre de Santé et des Services Sociaux de la Vieille-Capitale, the Hôpital régional du Centre de Santé et des Services Sociaux de Rimouski-Neigette and the Centre Hospitalier Régional de Lanaudière approved this study.

Participants

We approached all family physicians, including physician teachers and residents, who provided care in the walk-in clinics of the 12 family practice teaching units. We excluded physicians who had participated in the DECISION+ pilot trial13 or who did not expect to practise in the teaching unit during the trial period. In total, 162 family physicians participated in some or all of the training components. To reduce the risk of bias, patients with symptoms suggestive of an acute respiratory infection were initially recruited by a research assistant in the waiting room before consultation with a physician. We finally included patients (adults and children who were accompanied by a parent or legal guardian) with a diagnosis of acute respiratory infection (e.g., bronchitis, otitis media, pharyngitis or rhinosinusitis) and for which the use of antibiotics was subsequently considered either by the patient or physician during the visit. The patient, parent or legal guardian had to be able to read, understand and write French. Informed consent was obtained.

Randomization

A biostatistician used Internet-based software to simultaneously randomize all 12 family practice teaching units to either the intervention group (DECISION+2) or control group. The teaching units were stratified according to rural or urban location.

Intervention

DECISION+2 consisted of a 2-hour online tutorial followed by a 2-hour on-site interactive workshop (Box 1). The online tutorial addressed key components of the clinical decision-making process about antibiotic treatment for acute respiratory infections in primary care. Participants (teachers and residents) had one month to complete the online tutorial.

Box 1:

DECISION+2 shared decision-making training program

Online self-tutorial

  • Module 1: Introduction

    • introduce the shared decision-making process and acute respiratory infections

  • Module 2: Diagnostic probabilities

    • know the most useful signs and symptoms for the diagnosis of acute respiratory infections

    • integrate notions of diagnostic probabilities

    • know how to use diagnostic tools

  • Module 3: Treatment

    • know evidence on the effects of antibiotics in treating acute respiratory infections

    • integrate the concepts of probability associated with the effects of antibiotics in treating acute respiratory infections

    • if the option for antibiotics is selected, choose which one

  • Module 4: Effective communication of risk and benefits

    • understand the essential elements of effective communication of treatment options and their benefits and risks

    • use the communication tool on the benefits and risks associated with the use or not of antibiotics to treat acute respiratory infections

  • Module 5: Promoting active patient participation

    • ask questions relating to patient preferences and values, such as questions regarding their concerns about the benefits and risks associated with taking an antibiotic or not

    • use a visual tool to help patients clarify their values and preferences about the benefits and risks associated with taking an antibiotic or not

    • verify patient comfort with the decision made

Interactive workshop

  • estimate the diagnostic probabilities for acute respiratory infections

  • describe therapeutic options available for treating acute respiratory infections and describe their risks and benefits

  • use effective communication strategies to share risks and benefits of the options regarding use of antibiotics to treat acute respiratory infections

  • identify the patients’ values and preferences, consider their opinions and involve them in the decision to use or not to use an antibiotic to treat acute respiratory infections

  • use decision support tools that promote shared decision-making

Decision support tool

  • available in the consultation office (Appendix 1, available at www.cmaj.ca/lookup/suppl/doi:10.1503/cmaj.120568/-/DC1)

Facilitators who were trained during the DECISION+ pilot trial were updated on DECISION+2. These facilitators led the on-site interactive workshop, which aimed to help physicians review and integrate the concepts they acquired during the online training. Both the online tutorial and workshop included videos, exercises and decision aids to help physicians communicate to their patients the probability of a bacterial acute respiratory infection and the benefits and harms associated with the use of antibiotics (Appendix 1, available at www.cmaj.ca/lookup/suppl/doi:10.1503/cmaj.120568/-/DC1). As part of the intervention, research assistants verified that the decision aids were available in each of the walk-in consultation rooms in all of the family practice teaching units in the intervention arm.

Control

Physicians in the control group were asked to provide usual care. To avoid contamination bias, access to the online tutorial was denied to participants in the control group during the trial.

Outcomes

The primary outcome was the proportion of patients who decided to use antibiotics immediately after consultation. As soon as the consultation was finished, patients and physicians independently completed self-administered questionnaires, which solicited information about the diagnosis, whether the use of antibiotics was discussed, and the decision about the use of antibiotics after the consultation (delayed antibiotic use, no antibiotic use or immediate antibiotic use).

At this time, we also collected data about 3 secondary outcomes for both physicians and patients. We used the Decisional Conflict Scale to assess decisional conflict,14 the modified Control Preference Scale to assess the perception that shared decision-making had occurred,15–17 and a single-question Likert scale to assess the quality of the decision made. Two weeks later, we measured 5 additional secondary outcomes, at which time a research assistant telephoned patients to assess adherence to the decision (a single item asking if the patient maintained the decision made), repeat consultation (a single item asking if the patient had a repeat consult for the same reason), decisional regret (Decisional Regret Scale),18 quality of life (SF-12),19 and intention to engage in shared decision-making in future consultations regarding the use of antibiotics for acute respiratory infections (questions based on the Theory of Planned Behaviour).20

Family physicians’ intentions to engage in shared decision-making and their intentions to adhere to clinical practice guidelines in this context were recorded at baseline and again at the end of the study. Sociodemographic information, including preferred role in decision-making (Control Preference Scale),17 was recorded at trial entry for physicians and before consultation for patients.

Sample size calculation

Our sample size estimate was based on our pilot study.8 We assumed that the minimum clinical significance for an absolute reduction of the proportion of patients who decided to use antibiotics immediately after consultation was 20%. To detect a possible reduction from 60% to 40% with 80% power at a 5% significance level with the intracluster correlation coefficient of 0.02 estimated from our pilot trial, we needed 288 patients (or 24 in each of the 12 family practice teaching units). To compensate for loss to follow-up, we fixed the maximum recruitment of patients at 350 for each data collection period (175 patients per group).

Statistical analysis

Statistical analysis was performed by a statistician who was unaware of the teaching unit allocations. For the primary outcome, we combined delayed antibiotic use and no antibiotic use into a single category and contrasted it with immediate antibiotic use, because only a small percentage of patients who delay using antibiotics fill their prescription.21 Results are reported at the level of the individual patient, and we used the generalized linear mixed model procedure to perform the analyses. We adjusted where appropriate for potentially confounding variables, baseline scores and clustering of patients at the level of the teaching unit. The association between the role patients perceived that they had played in decision-making during consultation and their decision to use antibiotics immediately after the consultation was evaluated by use of the Cochran-Armitage trend test.

Results

In the DECISION+2 group, 11 of the 189 eligible physicians who were not available during the first phase of patient recruitment were recruited (completed the baseline questionnaire) after DECISION+2 training began and therefore were not included in the final analysis. Out of 162 (151 + 11), 103 completed both the online tutorial and the interactive workshop, 16 completed only the interactive workshop, 15 completed only the online tutorial, and 28 completed none of the training components. Thus, 72.8% (118/162) completed the online tutorial, and 73.5% (119/162) completed the interactive workshop. In the control group, 9 of the 144 eligible physicians who were not available during the first phase of patient recruitment were recruited (completed the baseline questionnaire) after DECISION+2 training began; these physicians were included in the follow-up.

In total, 9 of the 12 randomized family practice teaching units participated in the study (Figure 1). In general, key characteristics of the patients (Table 1) and family practice teaching units and physicians (Table 2) in the DECISION+2 group were similar to those in the control group. However, during the postintervention data collection phase, there were more children, fewer patients with chronic diseases, and more patients with private insurance in the intervention than in the control group (Table 1). Only age group (children or adults) was associated with the decision to use antibiotics.

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Table 1:

Characteristics of patients in the family practice teaching units before and after the intervention*

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Table 2:

Characteristics of physicians in the family practice teaching units before and after the intervention

Although the percentage of patients who decided to use antibiotics immediately after consultation was similar at baseline, after the intervention patients in the DECISION+2 group were significantly less likely than patients in the control group to report a decision to use antibiotics immediately after consultation (Table 3). The reduction in decisions to use antibiotics was observed in all intervention teaching units, while an increase was seen in 3 of 4 teaching units in the control group. The level of agreement was high between physicians and patients (κ = 0.96) concerning the decision about immediate versus delayed or no antibiotics use after the initial consultation.

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Table 3:

Proportion of patients deciding to use antibiotics immediately after consulting with their physician before and after the intervention, by study group, family practice teaching unit, type of physician and patient age group

Figure 2 shows the effect DECISION+2 had on the role patients perceived that they had played in decision-making during consultation. Among patients who consulted after the intervention, a higher proportion of patients in the DECISION+2 group (67%) than in the control group (49%) reported having an active role in the decision-making process. This difference was larger among patients who consulted teachers than among those who consulted residents. There was no significant difference between the study groups at baseline.

Figure 2:
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Figure 2:

Patient perceptions of how much they participated in decision-making during consultation with A) any participating physician (Z = 3.9; p < 0.001), B) a teaching physician (Z = 3.7; p < 0.001) or C) a resident (Z = −4.7918; p = 0.03). The perceptions were grouped as follows 1) I made the decision alone; 2) I made the decision but considered the opinion of my doctor; 3) My doctor and I decided equally; 4) My doctor made the decision but considered my opinion; 5) My physician made the decision alone.

There was no difference between trial groups with regard to the other secondary outcomes (Table 4). The slight effect observed on patient decisional regret was not clinically significant considering the low effect size observed (0.29).

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Table 4:

Secondary outcome measures before and after the intervention

Interpretation

We found that DECISION+2 significantly reduced decisions to use antibiotics for acute respiratory infections. This reduction was associated with enhanced patient participation in decision-making. The training had no statistically significant effect on decisional conflict, perception of the quality of the decision among family physicians and patients, decisional regret, repeat consultation or patient quality of life 2 weeks later.

Our data suggest that it is possible to train physicians to engage patients actively in decision-making.22–24 In the context of acute respiratory infections, this appears to reduce the use of a treatment option (i.e., antibiotics) not clearly associated with benefits for all patients.

The equally high pre- and postintervention intention to integrate shared decision-making into practice among both groups may be partly explained by a desirability bias. Although the results of our trial cannot fully inform policy-makers as to which components of DECISION+2 are the “active ingredients,” taken overall, it is effective. This program could be used in emergency departments or to train nurses in helping patients make informed value-based decisions before visiting a physician or emergency department.

Our results are consistent with those from a previous study in which the use of an interactive booklet about childhood respiratory tract infections in primary care consultations led to a significant reduction in antibiotic prescribing.25 In another recent study, a combination of online educational modules and a seminar on motivational interviewing led to a reduction in dispensing of oral antibiotics with no significant change in admissions to hospital, repeat consultations or costs.26 These studies indicate that a combination of live and media education are generally effective in changing physician performance in the context of antibiotic use for acute respiratory infections.27 These findings are important given the debate and widespread skepticism about the effect of medical education on the performance of physicians in the practice setting.28,29

Our results are consistent with those of our pilot trial. Although our pilot trial involved 5 large private practices with no residents, the baseline percentage of patients who decided to use antibiotics immediately after consultation was 56% in the intervention group and 54% in the control group. In contrast, in our current study the baseline percentage of patients who decided to use antibiotics immediately after consultation was 41% in the intervention group and 39% in the control group. Although one could argue that medical practices differ between private clinics and family practice teaching units,30 we believe that the difference in outcomes observed at baseline can be attributed to a seasonal effect (baseline recruitment in late fall and winter in the pilot study v. summer and early fall in the current trial); this has been observed in other studies.31 The seasonal effect might also explain the 13% increase in prescriptions in the control group between baseline (recruitment in the summer) and after the intervention (recruitment in the winter).

Limitations

Our trial had several limitations. First, 3 of the initial 12 clusters were lost to follow-up. DECISION+2 was integrated into the official residency training program, and all teaching units in the invention group received it simultaneously. However, because the program calendar was finalized in May, we had to perform randomization before meeting with the invitees in July and receiving their formal acceptance to participate. We believe that the impact of this limitation was minimal because loss was balanced between experimental and control groups and the characteristics of the participating units were similar.

Second, we did not report an objective measure of antibiotic use by patients, such as antibiotics dispensed, because it was impossible in this clinical context. However, the decision to use antibiotics reported independently by physicians and patients showed a high degree of agreement. In addition, a high level of adherence to the decision was reported by the patients.

Third, because this was a pragmatic trial, we did not control for other potential variables external to the residency program (e.g., whether participating physicians had taken other training programs on antibiotic prescribing or read material about acute respiratory infections beyond their residency requirements).

Fourth, we collected data from patients who had consulted with a participating physician but not from all patients who consulted a physician at the walk-in clinics of the participating family practice teaching units, so we do not know if the impact of DECISION+2 would have been similar on physicians who did not enrol in this trial but who were still exposed to the training program.

Fifth, although the biostatistician was unaware of group allocation, the researchers and research assistants who recruited patients and collected data were not.

Conclusion

By enhancing patient participation in decision-making, the DECISION+2 training program reduced the proportion of patients who decided to use antibiotics for acute respiratory infections immediately after consultation. This reduction occurred with no negative effect on patient outcomes at 2 weeks. Future studies should assess the effectiveness of shared decision-making in other clinical areas in which overuse is an issue and assess what is needed to scale up the uptake of DECISION+2 by other health care professional training programs.

Acknowledgements

The authors thank Gaston Godin, Annie LeBlanc and Claudine Laurier for providing comments on the research protocol and seeking funding. The authors thank the medical directors of the Family Practice Teaching Units affiliated with the Department of Family Medicine and Emergency Medicine at Université Laval for supporting the recruitment of physicians and residents. The authors thank Pierre Frémont, Kathleen Lemieux and Caroline Rhéaume for helping with the training sessions. The authors thank Isabelle Tremblay and the staff at the residency program directorship of the Department of Family Medicine and Emergency Medicine at Université Laval for providing expertise in the development of a 2-hour online tutorial. The authors thank Florence Doualla-Bell for providing helpful comments on an earlier draft of this manuscript. The authors thank Louisa Blair for assistance with manuscript preparation. France Légaré is Tier 2 Canada Research Chair is Implementation of Shared Decision-making in Primary Care. Jeremy Grimshaw is Tier 1 Canada Research Chair in Health Knowledge Transfer and Uptake.

Footnotes

  • Competing interests: None declared.

  • This article has been peer reviewed.

  • Contributors: France Légaré, Michel Labrecque and Jeremy Grimshaw conceived of and designed the study. Josette Castel and Michel Cauchon contributed to the design of the intervention and the acquisition of data. Stéphane Turcotte supervised data analysis. France Légaré and Michel Labrecque drafted the manuscript. All authors gave input regarding study concept and design, interpreted data, provided comments on drafts, revised the manuscript critically for important intellectual content and approved the final version of the manuscript submitted for publication.

  • Funding: This study was funded by a grant from the Conseil du médicament du Québec/Fonds de la recherche en santé du Québec. The funding organization had no role in the conception or design, conduct, analysis, interpretation or reporting of the study and no access to the data. None of the investigators received any financial compensation.

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Canadian Medical Association Journal: 184 (13)
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Vol. 184, Issue 13
18 Sep 2012
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Training family physicians in shared decision-making to reduce the overuse of antibiotics in acute respiratory infections: a cluster randomized trial
France Légaré, Michel Labrecque, Michel Cauchon, Josette Castel, Stéphane Turcotte, Jeremy Grimshaw
CMAJ Sep 2012, 184 (13) E726-E734; DOI: 10.1503/cmaj.120568

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Training family physicians in shared decision-making to reduce the overuse of antibiotics in acute respiratory infections: a cluster randomized trial
France Légaré, Michel Labrecque, Michel Cauchon, Josette Castel, Stéphane Turcotte, Jeremy Grimshaw
CMAJ Sep 2012, 184 (13) E726-E734; DOI: 10.1503/cmaj.120568
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  • Drivers and strategies for avoiding overuse. A cross-sectional study to explore the experience of Spanish primary care providers handling uncertainty and patients requests
  • Outpatient Antibiotic Use and the Need for Increased Antibiotic Stewardship Efforts
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