Symptom reporting in childhood asthma: a comparison of assessment methods

Effect of the Telemedicine Enhanced Asthma Management Through the Emergency Department (TEAM-ED) Program on Asthma Morbidity: A Randomized Controlled Trial

OBJECTIVE

To test the effectiveness of a telemedicine-based program in reducing asthma morbidity among children who present to the emergency department (ED) for asthma, by facilitating primary care follow-up and promoting delivery of guideline-based care.

STUDY DESIGN

We included children (3-12 years of age) with persistent asthma who presented to the ED for asthma, who were then randomly assigned to Telemedicine Enhanced Asthma Management through the Emergency Department (TEAM-ED) or enhanced usual care. TEAM-ED included (1) school-based telemedicine follow-ups, completed by a primary care provider, (2) point-of-care prompting to promote guideline-based care, and 3) an opportunity for 2 additional telemedicine follow-ups. The primary outcome was the mean number of symptom-free days (SFDs) over 2 weeks at 3, 6, 9, and 12 months.

RESULTS

We included 373 children from 2016 through 2021 (participation rate 68%; 54% Black, 32% Hispanic, 77% public insurance; mean age, 6.4 years). Demographic characteristics and asthma severity were similar between groups at baseline. Most (91%) TEAM-ED children had ≥1 telemedicine visit and 41% completed 3 visits. At 3 months, caregivers of children in TEAM-ED reported more follow-up visits (66% vs 48%; aOR, 2.07; 95% CI, 1.28-3.33), preventive asthma medication actions (90% vs 79%; aOR, 3.28; 95% CI, 1.56-6.89), and use of a preventive medication (82% vs 69%; aOR, 2.716; 95% CI, 1.45-5.08), compared with enhanced usual care. There was no difference between groups in medication adherence or asthma morbidity. When only prepandemic data were included, there was greater improvement in SFDs over time for children in TEAM-ED vs enhanced usual care.

CONCLUSIONS

TEAM-ED significantly improved follow-up and preventive care after an ED visit for asthma. We also saw improved SFDs with prepandemic data. The lack of overall improvement in morbidity and adherence indicates the need for additional ongoing management support.

TRIAL REGISTRATION

NCT02752165.

Parent Perceptions of a Validated Asthma Questionnaire in the Emergency Department

OBJECTIVE

While a number asthma questionnaires have been validated, most have not been used in an emergency department (ED) setting, nor evaluated patient feedback or clinical benefit. We sought to evaluate parent feedback on an asthma questionnaire used in an ED setting.

METHODS

We recruited parents of children 2-17 years old presenting to a tertiary pediatric ED for asthma care. Parents first completed then rated the Pediatric Asthma Control and Communication Instrument (PACCI-ED).

RESULTS

One hundred seventy-four parents (84%) completed surveys. Approximately two-thirds were Latinx, and 82% completed high school. Ninety-three percent of children had uncontrolled asthma. Parents endorsed the PACCI-ED: as easy to answer (94%); useful in understanding their child's asthma (83%); used the right words to describe their child's condition (95%); and would help the ED physician (93%) and primary care provider (PCP) (89%) better understand their child's asthma. Eleven percent reported that the PACCI-ED interfered with ED care. Parents with lower health literacy were more likely to agree the PACCI-ED asked more complete questions about their child's asthma than the ED physician (64% vs 45%, P = .02). Parents of children with uncontrolled asthma were more likely to agree that the PACCI-ED should become part of regular ED care (88% vs 62%, P = .02). Parents were more likely to agree that the PACCI-ED would help their PCP understand their child's asthma if they had a lower income (92% vs 50%, P < .001), less education (100% vs 88%, P = .004), were Latinx (94% vs 83%, P = .006), or were not using controller medication (93% vs 83%, P = .03).

CONCLUSIONS

Parents endorse an asthma questionnaire as valuable during an ED encounter. Because it is endorsed to be valuable to parents, this questionnaire could be used to facilitate patient-centered asthma care.

A digital health application for managing pediatric asthma: Use and benefits

Childhood asthma is a common and serious chronic lung disease. Mobile health (mHealth) technologies may assist clinical providers, caregivers, and children in managing pediatric asthma. This study evaluated the Nemours app, an mHealth application. We examined: a) frequency of data access by providers and feature use by caregivers (parents/legal guardians) of 5-11-year-old children diagnosed with asthma and b) whether utilization was related to benefits. Nine providers (allergists/pulmonologists) and 80 patient-families (caregiver/child dyads) participated. Two-years of retrospective data were obtained for asthma control, in-person urgent healthcare utilization, and app utilization. Six-months of prospective data included asthma control, in-person urgent healthcare utilization, app utilization, surveys, and health literacy screeners. Providers (56%) accessed app data and caregivers (61%) utilized the app. Caregiver use of messaging feature predicted gains in health literacy scores (b = .44, p = .041), suggesting app use may offer some educational benefits. Implementation of strategies that support app engagement and utilization may help to maximize intended benefits.

A systematic review of questionnaires measuring asthma control in children in a primary care population

Several questionnaires are used to measure asthma control in children. The most appropriate tool for use in primary care is not defined. In this systematic review, we evaluated questionnaires used to measure asthma control in children in primary care and determined their usefulness in asthma management. Searches were performed in the MEDLINE, Embase, Web of Science, Google Scholar and Cochrane databases with end date 24 June 2022. The study population comprised children aged 5-18 years with asthma. Three reviewers independently screened studies and extracted data. The methodological quality of the studies was assessed, using the COSMIN criteria for the measurement properties of health status questionnaires. Studies conducted in primary care were included if a minimum of two questionnaires were compared. Studies in secondary or tertiary care and studies of quality-of-life questionnaires were excluded. Heterogeneity precluded meta-analysis. Five publications were included: four observational studies and one sub-study of a randomized controlled trial. A total of 806 children were included (aged 5-18 years). We evaluated the Asthma Control Test (ACT), childhood Asthma Control Test (c-ACT), Asthma APGAR system, NAEPP criteria and Royal College of Physicians' '3 questions' (RCP3Q). These questionnaires assess different symptoms and domains. The quality of most of the studies was rated 'intermediate' or 'poor'. The majority of the evaluated questionnaires do not show substantial agreement with one another, which makes a comparison challenging. Based on the current review, we suggest that the Asthma APGAR system seems promising as a questionnaire for determining asthma control in children in primary care.

Children's and adolescents' descriptors of asthma symptoms: An integrative review

Background

Accurate assessment of asthma symptoms is central to appropriate treatment and management; however effective communication about symptoms-how it is perceived and reported-remain challenging in pediatric clinical and research settings.

Objective

To synthesize the existing pediatric literature on children's and adolescents' word descriptors of asthma symptoms.

Methods

In this integrative review, we systematically searched Cumulative Index of Nursing and Allied Health Literature and PubMed databases to identify original research studies from 1980 to 2021 on children and adolescents' word descriptors of asthma symptoms.

Results

The search yielded 2,232 articles, of which 21 studies met the eligibility criteria. Scientific literature focused on children and adolescents' descriptions of asthma symptoms are limited. In addition to standard asthma symptom terminology (e.g. cough, wheeze, chest tightness, shortness of breath), pediatric populations used nonstandard word choices to describe the asthma symptom experience. Children and adolescents used a variety of affective (e.g. 'helpless', 'afraid of dying') and sensory words (e.g. 'pressure in chest', 'tightness, lungs feel shut') to describe the phenomena. Literature examining race differences in word descriptors in pediatrics is limited; thus it is unclear if word descriptors vary by race or ethnicity. Evidence of relationships between descriptors and gender and age are also lacking.

Conclusions

Our review elucidates gaps in the literature regarding the full extent of the language common to racially and ethnically diverse samples of children and adolescents. Further research is warranted to help clinicians and researchers query children and adolescents' experience of asthma symptoms.

Racial Inequities in Asthma Care

Racial inequities in asthma care are evolving as a recognized factor in long-standing inequities in asthma outcomes (e.g., hospitalization and mortality). Little research has been conducted regarding the presence or absence of racial inequities among patients seen in asthma specialist settings, this is an important area of future research given that asthma specialist care is recommended for patients experiencing the poor asthma outcomes disproportionately experienced by Black and Hispanic patients. This study provides a systematic review of racial asthma care inequities in asthma epidemiology, clinical assessment, medication prescription, and asthma specialist referral practices.

Child's Illness Representation Instrument: Testing Reliability & Factor Structure Study

BACKGROUND

Researchers have determined that illness representation, including identifying the illness, understanding the cause, and knowing the risk, may influence asthma symptom management.

PURPOSE

The purpose of study was to determine reliability and factor structure for child's version of illness representation.

METHODS

A Maximum Likelihood factor analysis was used to examine reliability and factor structure of the child version of illness representation (CIR) scale. The sample included teens ages 12 to 18 from United States (N=331) with asthma.

RESULTS

The reliability was 0.79. Eight factors loaded with the most percentage of variance.

CONCLUSIONS

The perceptions of teens on the health care provider's prescribing practices may shed light on medication adherence. More research is needed to examine CIRS function in a study on medication adherence.

Asthma specialist care preferences among parents of children receiving emergency department care for asthma

Objective: To learn factors associated with desire for asthma specialist care among parents of children seeking emergency department (ED) care for asthma, and if referral was indicated based on national asthma guidelines. Methods: We surveyed parents of children ages 0-18 years seeking pediatric ED asthma care, then comparisons were made according to parental level of interest in asthma specialist care, with regard to socio-demographics, asthma morbidity and care, by chi-squared and logistic regression. Results: Of 149 children, 20% reported specialist care, but 75% met guideline criteria for referral. About 80% of parents not seeing an asthma specialist expressed a desire to see one. Higher rates of prior urgent care visits (48% vs. 22%, p = 0.03), ED visits (82% vs. 35%, p < 0.001) and oral steroid use (53% vs. 22%, p = 0.009) were reported by parents who desired an asthma specialist compared with parents who did not. 87% of parents not seeing a specialist attributed this to a perceived lack of necessity by their primary care provider. An ED visit within the prior 12 months was the most significant predictor in parental desire for specialist care (odds ratio 9.75; 95% CI 3.42-27.76) in adjusted logistic regression models. Conclusion: High rates of parental preference for asthma specialist care suggest that directly querying parents may be an efficient method to identify children appropriate for specialist care in the ED.

Underutilization of Preventive Asthma Visits Among Urban Children With Persistent Asthma

National guidelines recommend that children with persistent asthma have at least 2 preventive asthma visits (PAVs) per year. We sought to determine the percent of urban children with persistent asthma who had a PAV in the past year, and to identify differences in demographics, health-related variables, and management associated with PAVs. Using data from 530 children (3-10 years) participating in a school-based asthma trial, we found that only 25% of children had at least 1 PAV, with only 5% receiving ≥2 visits. Having a PAV was not associated with demographics or health-related variables. Importantly, having a PAV was associated with having a preventive medication, taking that medication daily, and having a medication adjustment. Although PAVs were associated with actions to improve asthma control and management, these visits were underutilized in this sample. This highlights the need for novel methods to ensure access and deliver care to this vulnerable pediatric population.

Introduction of a new paediatric asthma guideline: Effects on asthma control levels

BACKGROUND

In 2008, a new national paediatric asthma management guideline based on the international Global Initiative for Asthma (GINA) guideline was launched in the Netherlands. We studied whether asthma control and treatment regimens improved after introduction of the guideline by comparing survey data before and after the guideline introduction.

METHODS

Two comparable groups of children (6-16 years) with asthma were included before (2004) and after (2013) the introduction of the guideline. Children, parents and paediatricians completed questionnaires about asthma symptoms, medication and healthcare use. Spirometry was performed.

RESULTS

Data of 209 patients were analysed. Level of asthma control did not improve between 2004 and 2013 with a proportion of (partly) controlled asthmatics of 51% in 2004 and 59% in 2013 (p = 0.28). In 2013, paediatricians characterized 76% of children as (partly) controlled, while 59% of children was (partly) controlled according to GINA criteria (p < 0.05). Step-down treatment in controlled patients was more applied by paediatricians in 2013 compared to 2004 (from 8 to 40%, p < 0.05). Step-up treatment in uncontrolled patients did not improve.

CONCLUSIONS

Asthma control did not improve after the introduction of the new guideline. Compared to 2004, an improvement was observed in step-down treatment in patients with controlled disease.

Visual analogue scale (VAS) as a monitoring tool for daily changes in asthma symptoms in adolescents: a prospective study

Background

Success in asthma management hinges on patients’ competency to detect and respond to ever-changing symptom severity. Thus, it is crucial to have reliable, simple, and sustainable methods of symptom monitoring that can be readily incorporated into daily life. Although visual analogue scale (VAS) has been considered as a simple symptom assessment method, its utility as a daily symptom monitoring tool in adolescents is unknown. This study was to determine the concurrent validity of VAS in capturing diurnal changes in symptoms and to examine the relationships between VAS and asthma control and pulmonary function.

Methods

Forty-two adolescents (12–17 years old) with asthma completed daily assessment of symptoms twice per day, morning and bedtime, for a week using VAS and 6-item symptom diary concurrently. Asthma control was measured at enrollment and 6 month later, and spirometry was conducted at enrollment. Pearson correlations, multilevel modeling and regression were conducted to assess the relationships between VAS and symptom diary, asthma control and FEV1.

Results

Morning and evening VAS was positively associated with symptom diary items of each corresponding time frame of the day (r = 0.41–0.58, p < 0.0001). Morning VAS was significantly predicted by morning diary data reflecting nocturnal wakening (β = 2.13, p = 0.033) and morning symptoms (β = 4.09, p = 0.002), accounting for 57% of the total variance of morning VAS. Similarly, changes in four evening diary items, particularly shortness of breath (β = 2.60, p = 0.028), significantly predicted changes in evening VAS, accounting for 55% of the total variance. Average VAS scores correlated with asthma control (r = 0.65, p < 0.001) and FEV1 (r = −0.38, p = 0.029), and were predictive of asthma control 6 months later (β = 0.085, p = 0.006).

Conclusions

VAS is a valid tool capturing diurnal changes in symptoms reflected in a multi-item symptom diary. Moreover, VAS is a valid measure predicting concurrent and future asthma control. The findings suggest VAS can be a simple alternative to daily dairies for daily symptom monitoring, which can provide invaluable information about current and future asthma control without substantially increasing self-monitoring burdens for adolescent patients.

Clinical Trial Registration NCT01696357. Registered 18 September 2012

Asthma Control Test

We compared results of a modified version of the Asthma Control Test using parent proxy report (PP-ACT) with results reported by children and parents using the validated Childhood-Asthma Control Test (C-ACT). 104 parent-child dyads with a child aged 6 to 12 years with asthma were randomized to complete PP-ACT followed by C-ACT or C-ACT followed by PP-ACT. Scores ≤19 indicated uncontrolled asthma. We calculated sensitivity, specificity, positive predictive value, and negative predictive value for the PP-ACT in comparison with the C-ACT, and calculated concordance between the 2 scales. The PP-ACT had sensitivity of 86% and negative predictive value of 88% for detecting uncontrolled asthma. More than 75% of surveys were concordant (κ = 0.54, moderate agreement). Our results suggest that while the PP-ACT missed few children with uncontrolled asthma and may simplify reporting of asthma control in circumstances when child report is not feasible or creates barriers to survey receipt, limitations of proxy reporting should be considered.

Racial Disparities in Asthma Morbidity Among Pediatric Patients Seeking Asthma Specialist Care

OBJECTIVE

To elucidate whether there may be a higher morbidity threshold for African American versus white children to be referred to or seek asthma specialist care.

METHODS

Secondary analysis of registry data captured from children presenting for an initial routine outpatient asthma consultation. Parents completed standard survey instruments, and spirometry was conducted when deemed appropriate by the provider.

RESULTS

Wilcoxon rank sum tests revealed that African American patients had been hospitalized twice as often and admitted to the intensive care unit or intubated significantly more than 1½ times more frequently than their white patient counterparts. t tests indicated African American patients' forced expiratory volume in 1 second (FEV1) percentage predicted was significantly worse than that of whites, but there was no significant difference for FEV1/forced vital capacity ratio. t tests suggested that African American patients had statistically worse asthma control than did white patients at the time of initial presentation to the pulmonologist, but there was no difference in the distribution of asthma severity categories. Multivariate regression models indicated that racial differences in parent education did not explain the disparities in asthma morbidity.

CONCLUSIONS

African American patients had significantly worse asthma morbidity than their white counterparts, including higher rates of hospitalization and intensive care unit admission and poorer lung functioning. Given that receipt of asthma specialist care can improve those outcomes that are disparately experienced by African American children, methods of increasing their access to and use of asthma specialist care need to be developed.

How to ask about patient satisfaction? The visual analogue scale is less vulnerable to confounding factors and ceiling effect than a symmetric Likert scale

AIMS

To study the effects of scale type (visual analogue scale vs. Likert), item order (systematic vs. random), item non-response and patient-related characteristics (age, gender, subjective health, need for assistance with filling out the questionnaire and length of stay) on the results of patient satisfaction surveys.

BACKGROUND

Although patient satisfaction is one of the most intensely studied issues in the health sciences, research information about the effects of possible instrument-related confounding factors on patient satisfaction surveys is scant.

DESIGN

A quasi-experimental design was employed. A non-randomized sample of 150 surgical patients was gathered to minimize possible alterations in care quality.

METHODS

Data were collected in May-September 2014 from one tertiary hospital in Finland using the Revised Humane Caring Scale instrument. New versions of the instrument were created for the present purposes. In these versions, items were either in a visual analogue format or Likert-scaled, in systematic or random order. The data were analysed using an analysis of covariance and a paired samples t-test.

RESULTS

The visual analogue scale items were less vulnerable to bias from confounding factors than were the Likert-scaled items. The visual analogue scale also avoided the ceiling effect better than Likert and the time needed to complete the visual analogue scale questionnaire was 28% shorter than that needed to complete the Likert-scaled questionnaire.

CONCLUSION

The present results supported the use of visual analogue scale rather than Likert scaling in patient satisfaction surveys and stressed the need to account for as many potential confounding factors as possible.

Evaluating the Validity of an Automated Device for Asthma Monitoring for Adolescents: Correlational Design

BACKGROUND

Symptom monitoring is a cornerstone of asthma self-management. Conventional methods of symptom monitoring have fallen short in producing objective data and eliciting patients' consistent adherence, particularly in teen patients. We have recently developed an Automated Device for Asthma Monitoring (ADAM) using a consumer mobile device as a platform to facilitate continuous and objective symptom monitoring in adolescents in vivo.

OBJECTIVE

The objectives of the study were to evaluate the validity of the device using spirometer data, fractional exhaled nitric oxide (FeNO), existing measures of asthma symptoms/control and health care utilization data, and to examine the sensitivity and specificity of the device in discriminating asthma cases from nonasthma cases.

METHODS

A total of 84 teens (42 teens with a current asthma diagnosis; 42 without asthma) aged between 13 and 17 years participated in the study. All participants used ADAM for 7 consecutive days during which participants with asthma completed an asthma diary two times a day. ADAM recorded the frequency of coughing for 24 hours throughout the 7-day trial. Pearson correlation and multiple regression were used to examine the relationships between ADAM data and asthma control, quality of life, and health care utilization at the time of the 7-day trial and 3 months later. A receiver operating characteristic (ROC) curve analysis was conducted to examine sensitivity and specificity based on the area under the curve (AUC) as an indicator of the device's capacity to discriminate between asthma versus nonasthma cases.

RESULTS

ADAM data (cough counts) were negatively associated with forced expiratory volume in first second of expiration (FEV1) (r=-.26, P=.05), forced vital capacity (FVC) (r=-.31, P=.02), and overall asthma control (r=-.41, P=.009) and positively associated with daily activity limitation (r=.46, P=.01), nighttime (r=.40, P=.02) and daytime symptoms (r=.38, P=.02), and health care utilization (r=.61, P<.001). Device data were also a significant predictor of asthma control (β=-.48, P=.003), quality of life (β=-.55, P=.001), and health care utilization (β=.74, P=.004) after 3 months. The ROC curve analysis for the presence of asthma diagnosis had an AUC of 0.71 (95% CI 0.58-0.84), which was significantly different from chance (χ(2) 1=9.7, P=.002), indicating the device's discriminating capacity. The optimal cutoff value of the device was 0.56 with a sensitivity of 51.3% and a specificity of 72.7%.

CONCLUSIONS

This study demonstrates validity of ADAM as a symptom-monitoring device in teens with asthma. ADAM data reflect the current status of asthma control and predict asthma morbidity and quality of life for the near future. A monitoring device such as ADAM can increase patients' awareness of the patterns of cough for early detection of worsening asthma and has the potential for preventing serious and costly future consequences of asthma.

Predicting asthma control deterioration in children

Background

Pediatric asthma affects 7.1 million American children incurring an annual total direct healthcare cost around 9.3 billion dollars. Asthma control in children is suboptimal, leading to frequent asthma exacerbations, excess costs, and decreased quality of life. Successful prediction of risk for asthma control deterioration at the individual patient level would enhance self-management and enable early interventions to reduce asthma exacerbations. We developed and tested the first set of models for predicting a child’s asthma control deterioration one week prior to occurrence.

Methods

We previously reported validation of the Asthma Symptom Tracker, a weekly asthma self-monitoring tool. Over a period of two years, we used this tool to collect a total of 2912 weekly assessments of asthma control on 210 children. We combined the asthma control data set with patient attributes and environmental variables to develop machine learning models to predict a child’s asthma control deterioration one week ahead.

Results

Our best model achieved an accuracy of 71.8 %, a sensitivity of 73.8 %, a specificity of 71.4 %, and an area under the receiver operating characteristic curve of 0.757. We also identified potential improvements to our models to stimulate future research on this topic.

Conclusions

Our best model successfully predicted a child’s asthma control level one week ahead. With adequate accuracy, the model could be integrated into electronic asthma self-monitoring systems to provide real-time decision support and personalized early warnings of potential asthma control deteriorations.

What is left unsaid: an interpretive description of the information needs of parents of children with asthma

Parents of children with asthma provide the vast majority of day-to-day asthma care. Understanding their information needs is an essential step to provide meaningful and effective family-centered asthma education. To gain insight into the information needs and information deficits of parents of children with asthma, we conducted an interpretive descriptive study to capture the perspectives of 21 parents from diverse backgrounds whose 23 children with asthma had a range of illness trajectories and management scenarios. Parents were purposively sampled from two asthma clinics and one pediatric emergency department in a large urban center in North America. Semi-structured interviews were conducted in 2011-2012. In data analysis, parents' self-identified information needs were distinguished from analysts' interpretations of information deficits. Participants' knowledge did not always reflect time since diagnosis, and information needs and deficits persisted for years. Parents often reported receiving little or no little or no education about asthma and its management. An asthma management information hierarchy was identified, starting with the most foundational, recognizing severity; followed by acute management; prevention versus crisis orientation; and knowing "about" asthma. In the absence of adequate and accurate education, parents' beliefs about the nature of asthma as an acute rather than chronic condition shaped their asthma management decisions and information-seeking behaviors. Information deficits were affected by interactions with health care providers. These parents' pervasive unmet information needs and deficits highlight the need for comprehensive, problem-oriented asthma education.

The relationships among family management behaviors and asthma morbidity in maternal caregivers of children with asthma

Numerous studies have identified the relationship of the family caregiver's perception regarding asthma management and the child's asthma outcomes, although few have examined family caregiver asthma management behaviors. The primary aim of this study was to examine the relationship among family management behaviors and asthma morbidity as perceived by maternal caregivers. The Family Management Style Framework was used to guide the research. Maternal caregivers (N = 101) with school-aged children diagnosed with persistent asthma and living in the United States were recruited from a specialty asthma clinic. When caregivers perceived they were expending much effort on their child's asthma management and were not confident in their ability to perform management activities, the child's asthma outcomes were worse. This is the first study to examine family management behaviors with maternal caregivers of school-aged children with asthma. Findings from this study encourage health care providers to tailor each educational opportunity with families to improve child asthma outcomes. An ongoing effort must be made to include families in asthma management. Health care partnerships between provider and family can lead to improved asthma management.

Racial disparities at the point of care for urban children with persistent asthma

Little is known about disparities in preventive asthma care delivery at the time of an office visit. Our objective was to better understand what treatments are delivered at the point of care for urban children with asthma, and whether there are racial disparities. We enrolled 100 Black and 77 White children (2-12 years) with persistent asthma from 6 primary care practices. We evaluated how frequently providers delivered guideline-based asthma actions at the index visit. We also assessed asthma morbidity prior to the index visit and again at 2 month follow-up. Black children had greater symptom severity and were less likely to report having a preventive medication at baseline, but were no more likely to report a preventive medication action at the time of an office visit. Symptoms persisted for Black children at follow-up, suggesting additional preventive actions were needed. Further efforts to promote consistent guideline-based preventive asthma care are critical.

The development of an automated device for asthma monitoring for adolescents: methodologic approach and user acceptability

BACKGROUND

Many adolescents suffer serious asthma related morbidity that can be prevented by adequate self-management of the disease. The accurate symptom monitoring by patients is the most fundamental antecedent to effective asthma management. Nonetheless, the adequacy and effectiveness of current methods of symptom self-monitoring have been challenged due to the individuals' fallible symptom perception, poor adherence, and inadequate technique. Recognition of these limitations led to the development of an innovative device that can facilitate continuous and accurate monitoring of asthma symptoms with minimal disruption of daily routines, thus increasing acceptability to adolescents.

OBJECTIVE

The objectives of this study were to: (1) describe the development of a novel symptom monitoring device for teenagers (teens), and (2) assess their perspectives on the usability and acceptability of the device.

METHODS

Adolescents (13-17 years old) with and without asthma participated in the evolution of an automated device for asthma monitoring (ADAM), which comprised three phases, including development (Phase 1, n=37), validation/user acceptability (Phase 2, n=84), and post hoc validation (Phase 3, n=10). In Phase 1, symptom algorithms were identified based on the acoustic analysis of raw symptom sounds and programmed into a popular mobile system, the iPod. Phase 2 involved a 7 day trial of ADAM in vivo, and the evaluation of user acceptance using an acceptance survey and individual interviews. ADAM was further modified and enhanced in Phase 3.

RESULTS

Through ADAM, incoming audio data were digitized and processed in two steps involving the extraction of a sequence of descriptive feature vectors, and the processing of these sequences by a hidden Markov model-based Viterbi decoder to differentiate symptom sounds from background noise. The number and times of detected symptoms were stored and displayed in the device. The sensitivity (true positive) of the updated cough algorithm was 70% (21/30), and, on average, 2 coughs per hour were identified as false positive. ADAM also kept track of the their activity level throughout the day using the mobile system's built in accelerometer function. Overall, the device was well received by participants who perceived it as attractive, convenient, and helpful. The participants recognized the potential benefits of the device in asthma care, and were eager to use it for their asthma management.

CONCLUSIONS

ADAM can potentially automate daily symptom monitoring with minimal intrusiveness and maximal objectivity. The users' acceptance of the device based on its recognized convenience, user-friendliness, and usefulness in increasing symptom awareness underscores ADAM's potential to overcome the issues of symptom monitoring including poor adherence, inadequate technique, and poor symptom perception in adolescents. Further refinement of the algorithm is warranted to improve the accuracy of the device. Future study is also needed to assess the efficacy of the device in promoting self-management and asthma outcomes.

Longitudinal validation of a tool for asthma self-monitoring

OBJECTIVES

To establish longitudinal validation of a new tool, the Asthma Symptom Tracker (AST). AST combines weekly use of the Asthma Control Test with a color-coded graph for visual trending.

METHODS

Prospective cohort study of children age 2 to 18 years admitted for asthma. Parents or children (n = 210) completed baseline AST assessments during hospitalization, then over 6 months after discharge. Concurrent with the first 5 AST assessments, the Asthma Control Questionnaire (ACQ) was administered for comparison.

RESULTS

Test-retest reliability (intraclass correlation) was moderate, with a small longitudinal variation of AST measurements within subjects during follow-ups. Internal consistency was strong at baseline (Cronbach's α 0.70) and during follow-ups (Cronbach's α 0.82-0.90). Criterion validity demonstrated a significant correlation between AST and ACQ scores at baseline (r = -0.80, P < .01) and during follow-ups (r = -0.64, -0.72, -0.63, and -0.69). The AST was responsive to change over time; an increased ACQ score by 1 point was associated with a decreased AST score by 2.65 points (P < .01) at baseline and 3.11 points (P < .01) during follow-ups. Discriminant validity demonstrated a strong association between decreased AST scores and increased oral corticosteroid use (odds ratio 1.13, 95% confidence interval, 1.10-1.16, P < .01) and increased unscheduled acute asthma visits (odds ratio 1.23, 95% confidence interval, 1.18-1.28, P < .01).

CONCLUSIONS

The AST is reliable, valid, and responsive to change over time, and can facilitate ongoing monitoring of asthma control and proactive medical decision-making in children.

The Pediatric Asthma Control and Communication Instrument asthma questionnaire: for use in diverse children of all ages

BACKGROUND

National Institutes of Health asthma guidelines recommend questionnaires to assess asthma control, but these questionnaires are not useable across the entire pediatric age spectrum and have not been validated among significant numbers of minority or Spanish-speaking children.

OBJECTIVE

We sought to evaluate a questionnaire designed to assess asthma control across a broad age range of minority and Spanish-speaking children cared for in an outpatient setting.

METHODS

Between July 1, 2007, and September 30, 2010, we collected information using the Pediatric Asthma Control and Communication Instrument (PACCI), the Asthma Control Test (ACT; or the childhood ACT for children 4-11 years old), the Pediatric Asthma Caregiver Quality of Life Questionnaire, and lung function and clinicians' ratings of asthma status among a population of children presenting for routine asthma specialist care. The PACCI measure of asthma control was validated by evaluating accuracy, internal reliability, and concurrent, discriminative, and known-groups validity.

RESULTS

We collected information on 265 English- and 52 Spanish-speaking children (mean age, 8.2 years; 58% male; 44% African American). Across all age groups and in both languages, PACCI control showed good internal reliability and strong concurrent, discriminative, and known-groups validity with ACT and Pediatric Asthma Caregiver Quality of Life Questionnaire scores and clinicians' ratings of asthma control. The accuracy of the PACCI in classifying children with uncontrolled asthma was good (area under the curve, 0.83; 95% CI, 0.79-0.88).

CONCLUSIONS

The PACCI accurately measures asthma control in English- and Spanish-speaking children. The PACCI should be useful to clinicians to assess and classify asthma according to National Institutes of Health asthma guidelines.

The differential diagnosis and management of asthma in the preschool-aged child

PURPOSE

To discuss the diagnosis and management of asthma in preschool-aged children by nurse practitioners in primary care.

DATA SOURCES

Selected research and clinical articles; 2007 National Asthma Education and Prevention Program Guidelines for the Diagnosis and Management of Asthma.

CONCLUSIONS

Proper diagnosis leads to appropriate treatment of asthma in preschool-aged children, which facilitates asthma control. Well-controlled asthma results in fewer asthma exacerbations, fewer nighttime awakenings, and an increased ability to engage in normal childhood activities.

IMPLICATIONS FOR PRACTICE

Advanced practice nurses are in the position to aid in the initial diagnosis of asthma in preschool-aged children through taking detailed medical histories, providing thorough physical examinations, and, if needed, initiating a therapeutic trial with an inhaled corticosteroid. Proper diagnosis and management of asthma is essential to reduce asthma complications, such as exacerbations leading to emergency department visits and hospitalizations.

Airway obstruction at time of symptoms prompting use of reliever therapy in children with asthma

BACKGROUND

In asthma treatment, doses of inhaled corticosteroids are often adapted to symptoms and need for bronchodilators. However, in cross-sectional studies in emergency room settings, lung function and respiratory symptoms are not always concordant. Available longitudinal data are based on written peak flow diaries, which are unreliable. Using home spirometry, we studied prospectively whether mild respiratory symptoms, prompting reliever therapy are accompanied by a clinically relevant drop in lung function in children with asthma.

METHODS

For 8 weeks, children with asthma scored symptoms and measured peak expiratory flow (PEF) and forced expiratory volume in 1 sec (FEV(1)) on a home spirometer twice daily. Additional measurements were recorded when respiratory symptoms prompted them to use bronchodilators.

RESULTS

The mean difference between symptom free days and at times of symptoms was 6.6% of personal best for PEF (95% CI: 3.2-10.0; p = 0.0004) and 6.0% of predicted for FEV(1) (95% CI: 3.0-9.0; p = 0.0004). There was complete overlap in PEF and FEV(1) distributions between symptom free days and at times of symptoms.

CONCLUSIONS

Although statistically significant, the degree of airway narrowing at times of respiratory symptoms, prompting the use of reliever therapy, is highly variable between patients, limiting the usefulness of home spirometry to monitor childhood asthma.

Blowing the whistle: what do African American adolescents with asthma and their caregivers understand by "wheeze?"

AIMS

To investigate what African American adolescents with asthma and their caregivers understand by "wheeze".

METHODS

Caregivers (n = 35) and adolescents (n = 35) were each asked to describe what they understood by "wheeze". Respondents were also shown a video clip of an adolescent wheezing and asked: a) to describe the breathing of the adolescent in the video; and, b) whether the adolescent respondent's breathing had ever been similar to the video-presented symptoms.

RESULTS

Most caregivers described wheeze in terms of sound alone (61.8%) while the majority of adolescents described wheeze as something that is felt (55.8%). Few caregivers and adolescents (5.8% each) included "whistling" in their descriptions of "wheeze". Most caregivers and adolescents used the word "wheeze" when describing the video clip, but nearly one-quarter of the caregivers and one-third of the adolescents felt that the adolescent's breathing was never similar to the video.

CONCLUSION

Caregiver and adolescents descriptions of wheeze are different from each other and both may be different from clinical definitions of the term. Study findings have implications for the ways in which questions about "wheeze" are framed and interpreted.

Parent-child agreement in report of nighttime respiratory symptoms and sleep disruptions and quality

INTRODUCTION

Asthma control requires assessment of nighttime symptoms and sleep disruption. Cognitive and emotional development enables most school-aged children to report nocturnal problems, but providers often rely only on parental report, potentially limiting the comprehensiveness of their assessments and their ability to support the child's emerging efforts at shared management of their illness. This study investigated parent-child concordance in report of nighttime respiratory symptoms, sleep disruption, and quality of sleep in a sample of 9- to 11-year-old children with asthma. Secondarily, similar concordance patterns in an equal number of dyads where the child was asthma free were examined to illustrate the potential influence of asthma.

METHOD

Parents and children completed 1-week diaries in their homes without confiding in one another. The probability of knowing the child's report on a specific item if the parent's report was known was assessed using contingency tables.

RESULTS

Within the asthma group, parent-child reports differed significantly across all symptoms and sleep parameters. Parents most often reported fewer symptoms and awakenings and better quality of sleep than did their child. Concordance rates were lowest for morning perceptions of tiredness, sleepiness, and alertness in both asthma and non-asthma groups.

DISCUSSION

Both parents and school-aged children with asthma need to be asked about nighttime asthma symptoms, sleep, and morning perceptions when attempting to evaluate asthma control. Assessment of sleep in all children should include parent and child reports and would benefit by the addition of objective measures.

Signs and symptoms that precede wheezing in children with a pattern of moderate-to-severe intermittent wheezing

OBJECTIVES

To examine parent-reported signs and symptoms as antecedents of wheezing in preschool children with previous moderate to severe wheezing episodes, and to determine the predictive capacity of these symptom patterns for wheezing events.

STUDY DESIGN

Parents (n = 238) of children age 12 to 59 months with moderate-to-severe intermittent wheezing enrolled in a year-long clinical trial completed surveys that captured signs and symptoms at the start of a respiratory tract illness (RTI). Sensitivity, specificity, negative predictive value, and positive predictive value (PPV) for each symptom leading to wheezing during that RTI were calculated.

RESULTS

The most commonly reported first symptom categories during the first RTI were "nose symptoms" (41%), "significant cough" (29%), and "insignificant cough" (13%). The most reliable predictor of subsequent wheezing was significant cough, which had a specificity of 78% and a PPV of 74% for predicting wheezing.

CONCLUSIONS

Significant cough is the most reliable antecedent of wheezing during an RTI. It may be useful to consider individualized symptom patterns as a component of management plans intended to minimize wheezing episodes.

At what age do children start taking daily asthma medicines on their own?

OBJECTIVE

Use of daily controller medications is a critical task in management of persistent asthma. Study aims were to examine (1) the association between child age and extent of daily controller-medication responsibility in a sample aged 4 to 19 years, (2) parent, child, and disease predictors of child daily controller-medication responsibility and overall daily controller-medication adherence, and (3) the association between child daily controller-medication responsibility and overall daily controller-medication adherence.

METHODS

We conducted a cross-sectional telephone survey of 351 parents of children who were prescribed daily controller medication. Children's mean age was 10.4 years; 61.5% were male, and 88.1% were white. Parents provided all data, including an estimate of the percentage of child and parent daily controller-medication responsibility. Daily controller-medication adherence was measured as parents' report of percentage of daily doses taken per doses prescribed in a typical week. We used multivariate linear regression to determine associations between parent race/ethnicity, education, income, number of dependents, child age, gender, years since diagnosis, parent perception of symptom severity and control, and dependent variables (child daily controller-medication responsibility and daily controller-medication adherence). We also examined associations between child daily controller-medication responsibility and daily controller-medication adherence.

RESULTS

Child daily controller-medication responsibility increased with age. By age 7, children had assumed, on average, almost 20% of daily controller-medication responsibility; by age 11, approximately 50%; by age 15, 75%; and by age 19, 100%. In multivariate models, child age and male gender remained significantly associated with child daily controller-medication responsibility, and child's age and parents' race/ethnicity remained significantly associated with daily controller-medication adherence.

CONCLUSIONS

Clinicians may need to screen for child daily controller-medication management and include even young children when educating families on the use of asthma medications and other key asthma-management tasks.

Patterns of asthma control perception in adolescents: associations with psychosocial functioning

OBJECTIVE

The purpose was to identify and describe the patterns of asthma control perception in relation to actual symptom reports in adolescents and to compare the group with accurate control perception with those of inaccurate perception in relationship to sociodemographic characteristics, illness-related factors, and psychosocial factors.

METHODS

A sample of 126 adolescents from 13 through 20 years of age participated in the study. Patterns of control perception were constructed based on participants' rating of their perception of asthma control and self-reported asthma symptoms using Latent Class Analysis. Analyses of variance (ANOVAs) and multinomial logistic regressions were computed for group comparisons.

RESULTS

Participants were classified into four groups according to the patterns of control perception. Accurate groups were divided into either the well-controlled (62%) or the poorly-controlled group (7%), and inaccurate groups were manifested inaccuracy either with nighttime symptoms (25%) or daytime symptoms (6%). Minority participants (p < 0.001) or those with low socioeconomic status (p < 0.001) were more likely to be represented in the inaccurate group than their counterparts. The well-controlled accurate group consistently reported higher asthma-related knowledge (p = 0.02), more positive attitude toward asthma (p < 0.001), fewer barriers to self-management (p = 0.04), and higher quality of life (p < 0.001) than the inaccurate group.

CONCLUSION

This study demonstrated that accuracy of asthma control perception can be classified into four criteria based on patterns of various asthma symptoms. Adolescents' tendency toward underperception was evident. The inaccurate groups are at greater risk for psychosocial impairments. This study underscores the importance of an intervention that improves the accuracy of asthma control perception in adolescents while promoting psychosocial well-being among adolescents with inaccurate perception.

Patient factors used by pediatricians to assign asthma treatment

OBJECTIVE

Although asthma is often inappropriately treated in children, little is known about what information pediatricians use to adjust asthma therapy. The purpose of this work was to assess the importance of various dimensions of patient asthma status as the basis of pediatrician treatment decisions.

PATIENTS AND METHODS

We conducted a cross-sectional, random-sample survey, between November 2005 and May 2006, of 500 members of the American Academy of Pediatrics using standardized case vignettes. Vignettes varied in regard to (1) acute health care use (hospitalized 6 months ago), (2) bother (parent bothered by the child's asthma status), (3) control (frequency of symptoms and albuterol use), (4) direction (qualitative change in symptoms), and (5) wheezing during physical examination. Our primary outcome was the proportion of pediatricians who would adjust treatment in the presence or absence of these 5 factors.

RESULTS

Physicians used multiple dimensions of asthma status other than symptoms to determine treatment. Pediatricians were significantly more likely to increase treatment for a recently hospitalized patient (45% vs 18%), a bothered parent (67% vs 18%), poorly controlled symptoms (4-5 times per week; 100% vs 18%), or if there was wheezing on examination (45% vs 18%) compared with patients who only had well-controlled symptoms. Pediatricians were significantly less likely to decrease treatment for a child with well-controlled symptoms and recent hospitalization (28%), parents who reported being bothered (43%), or a child whose symptoms had worsened since the last doctor visit (10%) compared with children with well-controlled symptoms alone.

CONCLUSIONS

Pediatricians treat asthma on the basis of multiple dimensions of asthma status, including hospitalization, bother, symptom frequency, direction, and wheezing but use these factors differently to increase and decrease treatment. Tools that systematically assess multiple dimensions of asthma may be useful to help further improve pediatric asthma care.

Difficult to control asthma in children

PURPOSE OF REVIEW

The management of children with difficult asthma requires a systematic approach. These children are prescribed high doses of inhaled or oral corticosteroids and a balance must be struck between therapeutic efficacy and side effects. It is important to ensure the diagnosis is correct and that the reasons for poor control in a given child are characterized so that treatment can be targeted for maximal effect.

RECENT FINDINGS

Recent data have demonstrated the correlation between invasive and noninvasive measurement of airway eosinophils. Noninvasive markers of inflammation can be used to determine phenotype and there is increasing evidence on the utility of repeated measures to monitor control and treatment effects. Side effects of high-dose corticosteroids remain a concern. The emergence of new therapies may be of benefit. These are often expensive, however, and have the potential for major side effects. Adherence remains a significant obstacle to the effective management of difficult asthma.

SUMMARY

Children with difficult asthma are a heterogeneous group. Characterization and monitoring of these children can be enhanced by measurements of noninvasive markers of inflammation. Further evaluation of new and phenotype-specific treatments for children with difficult asthma need to be evaluated in prospective randomized controlled trials.