SUPPLEMENT ARTICLE |
a Department of Epidemiology, College of Human Medicine, Michigan State University, East Lansing, Michigan
b Grand Rapids Medical Education and Research Center/Michigan State University Program in Emergency Medicine, Grand Rapids, Michigan
| ABSTRACT |
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METHODS. We studied a prospective patient cohort consisting of children aged 2 to 17 years who presented with an acute asthma exacerbation at 3 EDs in western Michigan. An in-person questionnaire was administered to the parent or guardian during the ED visit. Information was collected on demographics; asthma history; usual asthma care; frequency of symptoms during the last 4 weeks; current asthma treatment, management, and control; and past emergency asthma care. A telephone interview conducted 2 weeks after the ED visit obtained follow-up information. The 8 quality indicators of asthma care and management were defined based on recommendations from national guidelines.
RESULTS. Of 197 children, 70% were enrolled at the urban site, 18% at the suburban site, and 12% at the rural site. The average age was 7.9 years; 60% were male, and 33% were black. At presentation, nearly half (46%) of the children had mild intermittent asthma, 20% had mild persistent asthma, 15% had moderate persistent asthma, and 19% had severe persistent asthma. One quarter of the children had been hospitalized for asthma, and two thirds had at least 1 previous ED visit in the past year. At least 94% had health insurance coverage and 95% reported having a primary care provider.
Less than half of the children had attended at least 2 scheduled asthma appointments with their regular asthma care provider in the past year. Although only 5% of the subjects reported that the ED was their only source of asthma care, at least 30% reported that they always went directly to the ED when they needed urgent asthma care. Only 3 in 5 children possessed either a spacer or a peak-flow meter, whereas
2 in 5 reported having a written asthma action plan. Among those with persistent asthma, there was considerable evidence of undertreatment, with 36% not on either an inhaled corticosteroid or a suitable long-term control medication. Only 20% completed a visit with their regular asthma care provider within 1 week of their ED visit.
CONCLUSIONS. Despite very high levels of health care coverage and access to primary care, the overall quality of asthma care and management fell well short of that recommended by national guidelines.
Key Words: pediatric asthma quality of care national guidelines
Abbreviations: EDemergency department NAEPPNational Asthma Education and Prevention Program ICSinhaled corticosteroid PCPprimary care provider PFMpeak-flow meter
Asthma is one of the more common reasons for children's visits to emergency departments (EDs).13 National health surveys and utilization rates of hospital services for asthma treatment indicate that the burden of asthma in US children has increased dramatically in the past 2 decades.4,5 The number of ED visits for asthma in children
14 years of age increased
14% in the United States from 19921999, and there now are >600000 ED visits annually for asthma in this age group.2 ED use for asthma care in children has been associated with many factors including younger age, gender, minority status, poverty, living in an urban area, having Medicaid or lack of insurance, access to care, quality of care, allergen-prone environments, and poorer health.612 However, the vast majority of these studies have been conducted in the inner-city environments of very large urban centers. There is less known about whether the characteristics of children who visit EDs in more suburban and rural settings differ from those of their urban counterparts.
Studies have shown that the care and management of asthma in children in the outpatient setting frequently fall short of what is recommended in the National Asthma Education and Prevention Program (NAEPP) guidelines.13,14 Most recent studies of children with asthma who use the ED have shown that although the majority do have access to primary care,8,9,1517 this access does not ensure that they receive the recommended asthma care and self-management training in the outpatient setting.9,10,15,16,18 For example, many children who use the ED seem to be undermedicated in terms of using an inhaled corticosteroid (ICS) or other long-term control medication,8,10,11,16,17 and follow-up visits with a primary care provider (PCP) usually occur much later than the time frame recommended in the NAEPP guidelines.1922
Here we describe the characteristics of children treated for an acute asthma exacerbation in 3 EDs in western Michigan (selected to represent urban, suburban, and rural settings) and report on several quality indicators of care and management based on NAEPP guidelines.
| METHODS |
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Subjects were enrolled when research or hospital staff were available and thus represent a convenience sample of all ED asthma visits. At the urban site, enrollment and data collection were conducted by 3 research nurses who were based in the ED and made regular rounds to identify potential asthma patients. Because of the lower anticipated case load at the suburban and rural hospitals, respiratory therapists agreed to undertake these activities at these sites. To obtain as representative a sample as possible at the urban site, research staff worked a wide range of shifts during the week and weekend and obtained a consecutive sample of subjects within any 1 shift. At the suburban and rural sites, the respiratory therapists provided 24-hour ED coverage and were instructed to enroll all eligible subjects. The ED staff were instructed to page the on-call respiratory therapist whenever a potential asthma case presented. Subject enrollment began in September 2001 and was planned to last 1 year or until the desired sample size of 120 subjects per site was obtained.
Research staff recruited subjects in the ED by approaching the parent or guardian while the child was undergoing treatment. Informed written consent was obtained from the parent or guardian, and assent was obtained from all children aged
7 years. The study was approved by the institutional review boards at Michigan State University, the 3 hospitals, the Michigan Department of Community Health, and the Centers for Disease Control and Prevention. All subjects were treated according to the usual medical care provided by the ED, including routine clinical and diagnostic evaluation, treatment, and discharge instructions. All parents/guardians were instructed to make a follow-up appointment with their regular asthma care provider within 1 week, and a copy of the dictated medical chart was faxed to that physician's office. In the small minority of subjects who did not have a PCP, efforts were undertaken by research staff to identify a medical provider and make an immediate referral.
Data Collection
A 31-item face-to-face questionnaire was administered in the ED by the research staff or respiratory therapists (Appendix 5). Data were collected on patient demographics; asthma history (eg, age at diagnosis); usual asthma care; frequency of symptoms in the last 4 weeks; current asthma treatment, management, and control; and past emergency asthma care.
Follow-up telephone interviews, conducted by the research nurses at the urban hospital site, were conducted 2 weeks and 6 months after the ED visit. For this current analysis, only information on follow-up appointments made with the child's regular asthma care provider determined from the 2-week follow-up call is included. A copy of the 2-week questionnaire is included in Appendix 6.
Defining Chronic Asthma Severity
Using criteria derived from the NAEPP guidelines,14 we classified each patient's underlying chronic asthma severity as mild intermittent, mild persistent, moderate persistent, or severe persistent based on the highest frequency of daytime symptoms, nighttime symptoms, restricted activities, or exacerbations (severe enough to affect speech) during the 4-week period preceding the ED visit.
Quality Indicators Based on NAEPP Recommendations
To assess the quality of asthma care and management before the ED visit, we defined the following 8 quality indicators based on specific NAEPP recommendations.
7 years of age) who had access to a PFM and the frequency with which it was used for self-monitoring.
Data Management and Statistical Analyses
Data were entered into a database by the research staff at the urban hospital site. Data were checked for completeness and accuracy, and the research staff followed up on missing or illogical responses. Descriptive statistics included proportions for categorical variables and means and SDs for continuous variables. Statistical comparisons among the 3 hospital sites and all variables of interest (ie, demographic factors and indicators for asthma care, control, and management) were generated by using the Pearson 2 test or Fisher's exact test when small cell sizes were encountered. The quality indicators for the total cohort were cross-tabulated with chronic severity, and tests for linear trend were performed by using the Mantel-Haenszel test. All analyses were undertaken in SAS 8.2 (SAS Institute, Inc, Cary, NC), and statistical significance was set at P < .05.
| RESULTS |
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40% had seen a specialist in the last year.
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The only statistically significant difference found in usual and urgent asthma care across the 3 sites was in hospitalization in the past year (Table 2). A much higher proportion of subjects at the urban site had been hospitalized in the past year compared with the other 2 sites (P = .02). The proportion of children at the urban site who had an ED visit in the past year or at least 2 regular appointments with their regular asthma care provider was also higher than at the other 2 sites; however, the differences were only marginally statistically significant (P < .10).
Asthma Care and Management
Table 3 shows various aspects of asthma care and management including access and use of asthma equipment, asthma-management plans, undertreatment, and prior asthma education. Sixty percent of subjects possessed a spacer, among whom >80% reported that they used it always or usually. Approximately 60% of the subjects also reported that they had a PFM, but only 14% used the PFM daily to monitor symptoms, whereas
40% reported that they used it only during exacerbations. There was a statistically significant association between access to a PFM and study site: a higher proportion of subjects at the urban site had a PFM compared with their counterparts at the other sites. Only 43% (n = 85) of the subjects reported having a written asthma-management plan.
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Most subjects (71%) had received some type of asthma education; of those, almost all (99%) had been instructed on how to use a nebulizer, and most had received education about medications and treatments (95%), asthma triggers (89%), and asthma attack strategies (83%). However, only a little over half of the children reported ever receiving education about how to use either a PFM or an asthma-management plan (Table 3).
Finally, of the 93% (n = 184) of subjects who completed the 2-week follow-up call, only 20% (n = 37) had completed a visit with their regular asthma care provider within 7 days; however, by the time the 2-week call was completed, 46% (n = 84) had either made or completed an appointment to see their regular asthma care provider in response to the ED visit.
Summary of Results for NAEPP Quality Indicators
Table 4 shows the proportion of subjects meeting each of the 8 quality indicators for the overall cohort, as well as by level of asthma severity during the 4-week period before the ED visit. Overall, the proportion of subjects who met the criteria for the 8 quality indicators was low. There were only 3 quality indicators (access to spacer, access to a PFM, and asthma education) for which more than half of the cohort met the respective criteria. Undertreatment was the only indicator that showed a statistically significant relationship with asthma severity. More than half of the subjects with mild persistent asthma were not taking at least a long-term control medication during the 4-week period before their ED visit, and the prevalence of undertreatment among the subjects with either moderate or severe persistent asthma was high also (36% and 22%, respectively).
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| DISCUSSION |
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Just over half of the children in this study had persistent asthma, and there was considerable evidence of undertreatment within that group. More than half of the patients with mild persistent asthma were not on at least a long-term control medication at presentation to the ED, whereas 36% and 22% of those with moderate or severe persistent asthma, respectively, were not on an ICS. Again, these findings are consistent with those of other ED-based studies, although most have reported even lower use of ICS or other long-term control medications.8,10,11,1518
Our study found that the prevalence of undertreatment was much lower at the urban site compared with the suburban and rural sites. We can only speculate as to why this finding was observed; however, given that there were few differences in the underlying characteristics of the asthma populations across the 3 sites, the lower prevalence of undertreatment likely reflects better quality of care among subjects who attended the urban site. The presence of a local asthma coalition in Grand Rapids that has widely promoted the importance of ICS may also play a role in these findings. It should be noted that our definition of undertreatment depends on the accuracy of the classification of chronic asthma severity, an assessment that occurs in the face of ongoing treatment and which therefore has the potential to represent the adequacy of asthma control rather than the underlying asthma severity. We attempted to measure the underlying severity of asthma by asking 4 specific questions about the frequency of symptoms during the 4-week period before the ED visit, and we were careful to distinguish these symptoms from those that occurred during the period shortly before the ED visit. However, ultimately, our assessment cannot be regarded as a true measure of the underlying asthma severity, and it is likely that the prevalence of persistent asthma is underestimated as a result of the influence of ongoing treatment.
The characteristics of this patient cohort were similar to those of other ED-based asthma studies of children in that more than half of the subjects were boys, the majority were <10 years of age, and there was an overrepresentation of minority populations.8,9,11,1518 Approximately one third of the study population was black, which is much higher than the underlying population of the Grand Rapids area, in which
10% of the population is black.
Similar to some other ED-based studies,16,23 we found that a relatively high proportion of children (46%) had only mild intermittent asthma, indicating that this patient population was not at particularly high risk. However, like most other studies, we found that a high proportion of these children exhibited health care-utilization patterns that suggest more severe or uncontrolled asthma; 25% had been hospitalized in the last year, and 60% had at least 1 prior ED visit for asthma in the last year. This apparent disconnect between the underlying asthma severity and the high rates of past ED visits and hospitalizations may be a reflection of the inability to accurately measure underlying asthma severity or the fact that health care-utilization patterns are driven in large part by behavioral and psychosocial factors7,12 rather than disease-specific measures such as asthma severity and control. Another interesting and paradoxical finding with respect to the high frequency of past ED use in this population was that only 5% reported that the ED was their usual source of asthma care. Although this report might lead one to conclude falsely that these children would rarely visit the ED for asthma care, 30% of the study subjects reported that they always went directly to the ED when they needed urgent asthma care, and an additional 25% said they went directly to the ED outside of regular office hours. Thus, more than half of the cohort described a propensity to go directly to the ED for urgent asthma care.
Although almost all of the subjects had access to a regular asthma care provider (either a PCP or asthma specialist), less than half had attended at least 2 regularly scheduled asthma appointments in the last year. These findings suggest that despite access to regular medical care, the continuity of care that is vital for the successful management of asthma7 remains a problem in this population. Unfortunately, because we did not seek additional information as to why the children had not gone to their regular asthma care provider more often, we are unable to point to the exact origin of this problem. Another indication of problems with the continuity of care was the fact that only 20% of the cohort had completed a visit with their regular asthma care provider within a week of the ED visit. Even after 2 weeks, less than half of the study subjects had either completed or made an appointment with their regular asthma care provider. These disappointing follow-up results again are similar to those reported previously1822 and occurred despite considerable efforts on behalf of the ED staff to facilitate such follow-up visits; these efforts included informing the accompanying adult to make a follow-up appointment, faxing a copy of the dictated medical chart to the regular asthma care provider, and identifying a medical provider and making an immediate referral for the minority of patients who did not have a PCP.
The rationale for looking at differences across urban, suburban, and rural ED sites stems from the observation that key characteristics of asthma, including prevalence, morbidity, and mortality, show clear geographical differences.24 Asthma in inner-city and rural populations is often regarded differently based on the fact that the underlying etiologies and environmental exposures may vary to some degree.25,26 However, both populations face similar challenges in terms of multiple barriers to adequate health care including poverty, underinsurance, and less access to health care providers. In this study, we found relatively few significant differences across the 3 sites; children treated at the urban site showed evidence of greater health care utilization, including higher rates of hospitalizations and ED visits in the last year, as well as more frequent regular asthma appointments with their regular asthma care provider. They also had greater access to PFMs and were less likely to be undertreated. Interpretation of these findings is difficult, although they probably represent the result of a complex set of interactions related to access to medical facilities and perhaps better quality of care.
Although this study was designed to explicitly compare and contrast care and management across the 3 different ED populations, we obviously had limited power to do so because of the low number of subjects enrolled at the suburban and rural sites. There were several reasons for this. First, early on in the data-collection period, the referral patterns for pediatric ED visits in the city of Grand Rapids changed dramatically when the urban-site hospital opened a separate pediatric ED. Consequently, the number of pediatric asthma visits to the suburban site fell dramatically. Second, the approach of using the on-duty respiratory therapist to collect study data at the suburban and rural sites was not successful despite the continued effort of the researchers and study staff. The project was promoted frequently at meetings with the respiratory therapists and other ED staff. Indirect incentives, such as book tokens and financial support for continuing education seminars were provided also. Although the original protocol planned to directly compensate the respiratory therapists for each subject who was enrolled, hospital policies prevented us from implementing such an incentive program. The collection of prospective patient data from ED sites that do not have a high asthma caseload (such as rural sites) therefore remains a challenge, because it is not cost-effective to use designated research staff in such situations.
The other potential limitation of this study relates to its representativeness. Despite the fact that enrollment at all 3 sites occurred across a wide range of days of the week and times of day, the data collected still represent a convenience sample of all ED visits. We therefore compared the age and gender distributions of the 3 study populations to that obtained from ED billing data collected during the same time period. We found no statistically significant differences between any of the study populations and total asthma visits as represented by the billing data (data not shown). Thus, we are confident that the data are a representative sample of all pediatric asthma visits at the 3 sites.
| CONCLUSIONS |
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70%) had read them.27,28 However, obvious gaps existed in the physicians' promotion of patient self-management practices; for example, less than half were providing written asthma-management plans, a finding that is concordant with results of our study. Reasons cited for this noncompliance include barriers in adopting the practices (lack of time/resources), disagreement with the guidelines, and belief that the recommendations are too rigid.2931 The problem of excessive and unnecessary ED visits for asthma is obviously multifactorial and highly complex, suggesting that several complementary interventions and/or system changes need to be made. Based on the findings of this study, improving the interaction between ED patients and their regular asthma care provider is probably a sound first step in addressing this problem.
| ACKNOWLEDGMENTS |
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Technical assistance was provided by the project officer, Seymour Williams, MD, and branch chief Stephen Redd, MD, both of the Air Pollution and Respiratory Health Branch, Division of Environmental Hazards and Health Effects, National Center for Environmental Health, Centers for Disease Control and Prevention. We acknowledge all of the staff from the 3 EDs for their assistance in facilitating this project; we are particularly indebted to our 2 primary research nurses, Jan Anderson and Jacque Perrin, who collected the majority of the data at the urban site. We also acknowledge the respiratory therapists who collected data for this project. The following people provided important input during the development phase of the study: Carmen Alexander, Carlos Carmago, Gary Kirk, Sarah Lyon-Callo, Karen Meyerson, Pam Meyer, Ken Rosenman, and Brian Rowe. Finally, we acknowledge the assistance of Karen Meyerson, Seymour Williams, Elizabeth Wasilevich, and Sarah Lyon-Callo, who provided useful comments on earlier drafts.
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Address correspondence to Mathew J. Reeves, PhD, Department of Epidemiology, B 601 West Fee Hall, Michigan State University, East Lansing, MI 48824. E-mail: reevesm{at}msu.edu
The authors have indicated they have no financial relationships relevant to this article to disclose.
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