Measuring asthma severity: instrument refinement

Smartphone App for monitoring Asthma in children and adolescents

PURPOSE

The asthma stepwise treatment approach recommended is based on monitoring patients' symptoms. The Asthma Research in Children and Adolescents (ARCA) cohort was created to provide evidence about the evolution of persistent asthma. This manuscript describes the development of an electronic health tool, comprising a mobile health application for patients with asthma and its associated online platform for pediatricians to monitor them.

METHODS

The development process followed 7 phases: the first 5 (Conceptualization, Preparation, Assessment scheduling, Image and user interface, and Technical development) defined and designed the tool, followed by a testing phase (functionality assessment and pilot test with ARCA patients), and a last phase which evaluated usability. Since the target population was aged 6-16 years, three versions were designed within the same smartphone application: parents/proxy, children, and adolescents. The online platform for pediatricians provides real-time information from the application: patients' responses over time with color-coded charts (red/amber/green, as in traffic lights).

RESULTS

The pilot test through semi-structured phone interviews of the first 50 participants included in the ARCA study (n = 53) detected their misunderstandings. Pediatricians were trained to emphasize that the application is free of charge and requires monthly answers. Median of the System Usability Scale scores (n = 85), ranging 0 (negative)-100 (positive), was > 93 in the three age versions of the application.

CONCLUSIONS

Technology has the capability of transforming the use of patient-reported outcomes. Describing all the development phases of a mobile health application for monitoring children and adolescents with asthma may increase the knowledge on how to design applications for young patients.

Pediatric sleep questionnaire predicts more severe sleep apnea in children with uncontrolled asthma

OBJECTIVE

While up to 35% of children with asthma have evidence of sleep disordered breathing (SDB), it is unclear if nocturnal symptoms stem from asthma itself or SDB. The Pediatric Sleep Questionnaire (PSQ) is a validated tool for identifying SDB in childhood asthma. We hypothesize children with asthma and abnormal PSQ demonstrate decreased asthma control and are at higher risk of obstructive sleep apnea (OSA).

METHODS

We performed a retrospective, chart review of children and young adults referred to our tertiary children's hospital severe asthma clinic. Data collection included age, gender, BMI percentile, spirometry, PSQ, asthma control questionnaires, asthma severity, control, and impairment. These data were evaluated in the context of polysomnography, when available.

RESULTS

205 inner-city children were included; 37.2% female, median age 6.4 y, and mean BMI of 71.3%ile. Rhinitis (p = 0.028), eczema (p = 0.002), and reflux (p = 0.046) were associated with abnormal PSQ; however, overweight/obese status, spirometry, asthma severity, and serologic markers were not. After correcting for comorbidities, abnormal PSQ score was associated with poor asthma control based on validated measures (p < 0.001). In patients with polysomnography, we confirmed abnormal PSQ was associated with increased OSA severity (apnea-hypopnea index 9.1/hr vs. 3.6/hr; p = 0.027).

CONCLUSIONS

In pediatric asthma, positive PSQ was associated with significantly decreased asthma control. Additionally, children with normal PSQ demonstrated mild OSA, while children with abnormal PSQ had increased severity of OSA. This demonstrates that PSQ can be used to screen children for more severe sleep apnea.

Examining Social Determinants of Health in Childhood Asthma Management

PURPOSE

Social determinants of health (SDoHs) influence how well a family manages children's asthma. The aim of this study was to examine the influence of SDoHs on family asthma management.

DESIGN

A cross-sectional exploratory study was conducted with 292 children in grades 2 to 5 who had current asthma and their parents to examine associations between SDoHs and the families' asthma management, quality of life, and healthcare utilization.

METHODS

Data were collected from both child and parent. Social determinants of health include the child's race/ethnic group, age, gender, and asthma severity and the family's socioeconomic status and language spoken in the home, and the school was the community-level variable. Parents and children completed asthma management and quality-of-life scales and parents reported on the children's emergency department visits and hospitalizations for asthma.

RESULTS

Worse quality of life was reported by families with lower socioeconomic status and African American children. Asthma severity was associated with parents' asthma management but not children's asthma self-management. Families who spoke Spanish at home had the lowest socioeconomic status yet performed significantly more asthma management than English-speaking families.

CONCLUSIONS

The findings highlight factors the clinical nurse specialist should address in educational interventions.

Phthalates and organophosphates in settled dust and HVAC filter dust of U.S. low-income homes: Association with season, building characteristics, and childhood asthma

Phthalates and organophosphates are ubiquitous indoor semi-volatile organic contaminants (SVOCs) that have been widely used as plasticizers and flame retardants in consumer products. Although many studies have assessed their levels in house dust, only a few used dust samples captured by filters of building heating, ventilation, and air conditioning (HVAC) systems. HVAC filters collect particles from large volumes of air over a long period of time (potentially known) and thus provide a spatially and temporally integrated concentration. This study measured concentrations of phthalates and organophosphates in HVAC filter dust and settled floor dust collected from low-income homes in Texas, United States, in both the summer and winter seasons. The most frequently detected compounds were benzyl butyl phthalate (BBzP), di-(2-ethylhexyl) phthalate (DEHP), di-n-octyl phthalate (DnOP), tris (1-chloro-2-propyl) phosphate (TCIPP), triphenyl phosphate (TPHP), and tris (1,3-dichloroisopropyl) phosphate (TDCIPP). The median level of TCIPP in settled dust was 3- to 180-times higher than levels reported in other studies of residential homes. Significantly higher concentrations were observed in HVAC filter dust as compared to settled dust for most of the frequently detected compounds in both seasons, except for several phthalates in the winter. SVOC concentrations in settled dust in winter were generally higher than in summer, while different seasonality patterns were found for HVAC filter dust. Settled dust samples from homes with vinyl flooring contained significantly higher levels of BBzP and DEHP as compared to homes with other types of floor material. The concentration of DEHP and TDCIPP in settled dust also significantly associated with the presence of carpet in homes. Cleaning activities to remove dust from furniture actually increased the levels of certain compounds in HVAC filter dust, while frequent vacuuming of carpet helped to decrease the concentrations of some compounds in settled dust. Additionally, the size and age of a given house also correlated with the levels of some pollutants in dust. A statistically significant association between DEHP concentration in HVAC filter dust in summer and the severity of asthma in children was observed. These results suggest that HVAC filter dust represents a useful sampling medium to monitor indoor SVOC concentrations with high sensitivity; in contrast, when using settled dust, in addition to consideration of seasonal influences, it is critical to know the sampling location because the type and level of SVOCs may be related to local materials used there.

Feasibility study of a combined lifestyle behaviors and asthma self-management intervention for school-aged children

PURPOSE

The purpose of this study is to test the feasibility of delivering an intervention that combines healthy lifestyle behaviors related to weight management with asthma self-management, the Living Healthy with Asthma intervention, to children who have asthma.

METHODS AND DESIGN

Using a mixed design, the feasibility study of the 12-week Living Healthy with Asthma intervention was conducted with a single group of children diagnosed with asthma. Pretest and posttest data were collected on asthma-related (self-management, metered dose inhaler [MDI] skill, asthma severity, quality of life [QOL]), and healthy lifestyle variables (body mass index [BMI], dietary quality). A matched comparison sample was drawn from a separate study that tested the same asthma self-management component (single intervention) used in the feasibility study to determine if the Living Healthy with Asthma intervention worked as well as the single intervention for improving children's asthma self-management.

RESULTS

Thirteen school-aged children were enrolled in the feasibility study. There were significant reductions in BMI z-scores (P = 0.007), and improvements in vegetable servings (P = 0.03), MDI skill (P = 0.005), children's QOL (P < 0.001), and parents' QOL (P = 0.03). When comparing the feasibility group with the matched comparison group (n = 13), there were no significant differences in asthma self-management, MDI skill, or asthma severity after the interventions.

PRACTICE IMPLICATIONS

Findings supported the feasibility of implementing the combined intervention, and it was not inferior to the single intervention-which supports nurses' efforts to help families manage multiple health problems.

A new model of wheezing severity in young children using the validated ISAAC wheezing module: A latent variable approach with validation in independent cohorts

BACKGROUND

The International Study of Asthma and Allergies in Children (ISAAC) Wheezing Module is commonly used to characterize pediatric asthma in epidemiological studies, including nearly all airway cohorts participating in the Environmental Influences on Child Health Outcomes (ECHO) consortium. However, there is no consensus model for operationalizing wheezing severity with this instrument in explanatory research studies. Severity is typically measured using coarsely-defined categorical variables, reducing power and potentially underestimating etiological associations. More precise measurement approaches could improve testing of etiological theories of wheezing illness.

METHODS

We evaluated a continuous latent variable model of pediatric wheezing severity based on four ISAAC Wheezing Module items. Analyses included subgroups of children from three independent cohorts whose parents reported past wheezing: infants ages 0-2 in the INSPIRE birth cohort study (Cohort 1; n = 657), 6-7-year-old North American children from Phase One of the ISAAC study (Cohort 2; n = 2,765), and 5-6-year-old children in the EHAAS birth cohort study (Cohort 3; n = 102). Models were estimated using structural equation modeling.

RESULTS

In all cohorts, covariance patterns implied by the latent variable model were consistent with the observed data, as indicated by non-significant χ2 goodness of fit tests (no evidence of model misspecification). Cohort 1 analyses showed that the latent factor structure was stable across time points and child sexes. In both cohorts 1 and 3, the latent wheezing severity variable was prospectively associated with wheeze-related clinical outcomes, including physician asthma diagnosis, acute corticosteroid use, and wheeze-related outpatient medical visits when adjusting for confounders.

CONCLUSION

We developed an easily applicable continuous latent variable model of pediatric wheezing severity based on items from the well-validated ISAAC Wheezing Module. This model prospectively associates with asthma morbidity, as demonstrated in two ECHO birth cohort studies, and provides a more statistically powerful method of testing etiologic hypotheses of childhood wheezing illness and asthma.

Exploration of the Influence of Factors Identified in the Literature on School-aged Children's Emotional Responses to Asthma

Approximately 6.3 million US children suffer from asthma. The purpose of this study was to explore factors on school-aged children's emotional responses to asthma, N=85, ages 6-12. Correlations included Asthma related child emotional functioning QOL and (a) asthma severity, r=-0.30, p<0.01, (b) child internalizing behaviors, r=-0.26, p<0.05, (c) child externalizing behaviors r=-0.43, p<0.001; Caregiver emotional functioning QOL and (a) asthma severity, r=-0.39, p<0.001, (b) child internalizing behaviors, r=-0.22, p<0.05, (c) child externalizing behaviors, r=-0.25; p<0.05. Multiple regression analysis revealed that asthma severity and child externalizing problems accounted for 26% of the variance in asthma related child emotional functioning QOL, F (4, 79)=7.051, p<0.001 (asthma severity, β=-0.31, p<0.01; child externalizing problem behaviors, β=-0.43, p<0.001). Findings imply that asthma research should consider problem behaviors of school-aged children when addressing asthma related emotional functioning QOL.

Enhancing Asthma Self-Management in Rural School-Aged Children: A Randomized Controlled Trial

PURPOSE

To test the effects of 2 modes of delivering an asthma educational intervention on health outcomes and asthma self-management in school-aged children who live in rural areas.

METHODS

Longitudinal design with data collected 4 times over 12 months. The target sample was composed of children in grades 2-5 who had a provider diagnosis of asthma. Elementary schools were stratified into high or low socioeconomic status based on student enrollment in the free or reduced-cost lunch program. Schools were then randomly assigned to 1 of 3 treatment arms: in-school asthma class, asthma day camp, or the attention-control group.

FINDINGS

Sample retention was good (87.7%) and equally distributed by study arm. Improvements in emergency department visits and office visits were related to attending either the asthma class or asthma day camp. Asthma severity significantly decreased in both asthma treatment groups. Other factors such as hospitalizations, parent asthma management, and child asthma management improved for all groups.

CONCLUSIONS

Both asthma class and asthma day camp yielded significant reductions in asthma severity. There were reductions in the emergency department and office visits for the 2 asthma arms, and hospitalizations declined significantly for all groups. Asthma self-management also improved in all groups, while it was somewhat higher in the asthma arms. This may be due to the attention being drawn to asthma management by study participation and the action of completing questionnaires about asthma management, asthma symptoms, and health outcomes.

An exploration of parent-child dyadic asthma management influences on quality of life

Most studies of childhood asthma management use data from a single family reporter and fail to capture the parent-child dyadic influences. In this descriptive exploratory study with 183 parent-child dyads, data were collected from both parents and children. Using structural equation modeling, the relationships of parents' and children's asthma knowledge, self-efficacy to manage asthma, and asthma management on the child's quality of life were examined. Direct significant relationships from knowledge to self-efficacy to asthma management were found for each member of the dyad. The associations between parents' and children's self-efficacy and asthma management were not statistically significant. Only the children's self-efficacy to manage asthma was significantly associated with children's asthma-related quality of life.

Asthma knowledge, subjective assessment of severity and symptom perception in parents of children with asthma

OBJECTIVES

This study aimed to confirm the tendency for parents to underestimate the severity of symptoms and the poor consistency between parents' reports of symptoms and the physicians' evaluation of asthma control. Additionally, the relationship between parents' asthma knowledge and their report of symptoms and estimation of asthma severity was explored.

METHODS

Fifty children (M = 10.5 years) and their caregivers were recruited from two Portuguese hospitals. A measure of asthma symptoms report (Severity of Chronic Asthma, SCA) and a subjective evaluation of asthma severity were collected and compared with physicians' ratings of asthma control, as well as parents' knowledge about asthma (Asthma Knowledge Questionnaire, AKQ) and emotional disturbance (Brief Symptom Inventory, BSI).

RESULTS

Although parents' evaluation of perceived asthma severity was moderately correlated to symptoms reported, results confirm an inconsistency between parents' reports of symptoms, their subjective rating of asthma severity and the physician's rating of clinical control, revealing a tendency for parents to underestimate disease severity and to underreport asthma symptoms. Asthma knowledge was not significantly correlated to SCA or to parents' subjective evaluation of asthma severity. Parents with poorer knowledge reported fewer symptoms.

CONCLUSIONS

Portuguese parents revealed a tendency to overestimate their child's level of asthma control and a low level of asthma knowledge. Parents' education, psychological disturbance and time since diagnosis were associated with asthma knowledge. Parents' knowledge was not related to the child's asthma outcomes or to their subjective evaluation of asthma severity or symptoms reports. Parents' asthma knowledge deficits, underreporting of symptoms and underestimation of asthma severity, may affect parent-provider communication and impede asthma control.

Is rural school-aged children's quality of life affected by their responses to asthma?

The unpredictable nature of asthma makes it stressful for children and can affect their quality of life (QOL). An exploratory analysis of 183 rural school-aged children's data was conducted to determine relationships among demographic factors, children's responses to asthma (coping and asthma self-management), and their QOL. Coping frequency, asthma severity, and race/ethnicity significantly predicted children's asthma-related QOL. Children reported more frequent coping as asthma-related QOL worsened (higher scores). Children with more asthma severity had worse asthma-related QOL. Post hoc analyses showed that racial/ethnic minorities reported worse asthma-related QOL scores than did non-Hispanic Whites.

Feasibility and benefits of a school-based academic and counseling program for older school-age students with asthma

An asthma education program for older school-age students with asthma was developed in collaboration with school personnel, healthcare professionals, and community partners. Feasibility and benefits were evaluated using a single-group, prospective, quasi-experimental design. The convenience sample, consisting of 28 grade 6 and 7 students with asthma, had 50% males, a diverse racial background, and a wide range of incomes. Feasibility and benefits were demonstrated by comparing pre-intervention to 1- and 12-month post-intervention evaluation of students who completed more than 70% of the 10 sessions. Statistically significant improvements in cognitive, behavioral, psychosocial, and quality of life outcomes were seen from pre-intervention to 1-month post-intervention (all p < .03). Severity of asthma significantly improved from 1- to 12-month post-intervention (p= .04).

Associations of Fraction of Exhaled Nitric Oxide with Beta Agonist Use in Children with Asthma

The fraction of exhaled nitric oxide (FeNO), a measure of airway inflammation, is a potential noninvasive tool to guide asthma management in children. It remains unclear, however, if FeNO adds any information beyond clinical assessment of asthma control. We evaluated the associations of FeNO level with short acting beta agonist use and compared it with other clinical asthma assessments. We examined a prospective cohort study of 225 tobacco-smoke-exposed children aged 6-12 years with doctor-diagnosed asthma, including measures of FeNO, reported days of short acting beta agonist use, and unscheduled asthma visits. FeNO was analyzed in relation to current and future (3 months later) short acting beta agonist use. Mean FeNO at baseline, 6, and 12 months was 15.5, 15.7, and 16.8 ppb. In multivariable analyses, higher FeNO level was associated with increased short acting beta agonist use but only among children who were not on inhaled corticosteroids. Among those not on an inhaled steroid, there was a 12% increase in current and 15% increase in future days of short acting beta agonist use for every 10 ppb increase in FeNO level. FeNO levels remained associated with current short acting beta agonist use even after adjusting for unscheduled asthma visits. FeNO levels remained associated with future short acting beta agonist use even after adjusting for current short acting beta agonist use or unscheduled asthma visits. We conclude that FeNO levels are associated with short acting beta agonist use but only among children who are not on an inhaled corticosteroid.

Grade retention risk among children with asthma and other chronic health conditions in a large urban school district

Asthma accounts for 12.8 million missed school days for children nationwide. Whether this excess absenteeism contributes to poor outcomes such as grade retention is of interest. The Clark County School District in Las Vegas, NV has incorporated the Federal "No Child Left Behind Act," which states that absences per individual in excess of 10 per school year are considered unapproved and may put a child at risk for repeating a grade. The purpose of this study was to determine if children with asthma are at increased risk for absenteeism associated with grade retention. Secondary data were obtained for students in attendance for the 2006-2007 school year. Days absent were weighted for enrollment time. Frequencies were obtained using descriptive statistics, and multivariate logistic regression was used to model the odds of absenteeism > 10 days per year. Of 300 881 students, 27 299 (9.1%) reported having asthma, as determined by school health records. The population was 52% male, 37% white, and 39% Hispanic. Significant predictors of missing > 10 days per school year included ethnicity, gender, grade, and health status (P < 0.0001). Students with asthma (adjusted odds ratio [aOR], 1.5) or asthma plus another health condition (aOR, 1.6) were at significantly increased odds of missing > 10 school days per year compared with healthy students or those with a medical condition other than asthma (P < 0.0001). Lastly, some disparities were found in current grade point average by race, gender, and asthma status. Children with asthma have a greater risk of absenteeism associated with grade retention. Therefore, improved asthma management and tailored education is necessary to identify and eliminate asthma triggers in the home and school setting for school-aged children.

Asthma severity and child quality of life in pediatric asthma: a systematic review

OBJECTIVE

To systematically review evidence of asthma severity as a correlate of child quality of life (QOL) in pediatric asthma.

METHODS

Online bibliographic databases (PsycINFO, PsycARTICLES, and MEDLINE) were used to identify relevant studies that specifically considered the relationship between asthma severity and child QOL.

RESULTS

Fourteen studies matching inclusion and exclusion criteria were reviewed. Asthma severity was significantly related to child QOL in nine of these studies. Informant of QOL and type of QOL measure were found to influence the strength of the relationship between severity and child QOL in pediatric asthma.

CONCLUSIONS

Findings suggest that asthma severity is a correlate of child QOL. Children whose asthma symptoms are not well-managed are likely to experience an impaired level of QOL. Findings also suggest the need to utilize asthma-specific QOL measures and an informant of QOL other than the child's parent in order to receive the most accurate information about the child's level of functioning.

PRACTICE IMPLICATIONS

Researchers and healthcare providers basing clinical outcomes on QOL assessments should consider asthma severity in their evaluations. Further, researchers and healthcare providers should recognize the continued need to reduce asthma severity and improve asthma symptom control in their attempts to improve the QOL of children with asthma.

Childhood asthma in a rural environment: implications for clinical nurse specialist practice

PURPOSE

The purpose of this study was to identify factors that impact asthma morbidity in rural school-aged children.

DESIGN

Exploratory analysis of baseline data collected in a longitudinal intervention study was performed.

SETTING

Four rural school districts that served small towns and unincorporated areas participated in this study.

SAMPLE

Participants were children in grades 2 to 5 who had current asthma and who spoke English or Spanish. There were 183 children (108 boys, 75 girls) with an average age of 8.78 years and who were Hispanic (46%), white (31%), or African American (22%).

METHODS

Associations between asthma risk factors (gender, ethnicity/race, socioeconomic status, asthma severity), asthma resources (access to care, health insurance), family asthma management, and asthma morbidity (absenteeism, emergency department visits, hospitalizations) were analyzed.

FINDINGS

Children with more severe asthma had higher absenteeism and more hospitalizations, and their parents performed more asthma management behaviors. Families who had difficulty accessing care had more hospitalizations and emergency department visits and were more likely to be poor. More boys, more Hispanic and African American children, and more children from poorer families were hospitalized for asthma than were middle-class and non-Hispanic white children.

CONCLUSIONS

Asthma is a chronic condition that is fairly easy for some families to manage, whereas other families are having higher asthma morbidity that needs to be addressed through targeted interventions.

A Danish population-based cohort study of newly diagnosed asthmatic children's care pathway - adherence to guidelines

Background

Asthma is the most common chronic disease in childhood. Large variations exist concerning the number of children being treated by general practitioners and by specialists. Consequently, health related costs due to this disease vary as care by specialists is more expensive compared with care by general practitioners. Little is known of the consequences of these variations concerning the quality of care. The aim of the study was to analyse associations between care providers and adherence to guidelines concerning frequency of contacts with the health service due to asthma.

Methods

A cohort study was performed of 36,940 incident asthmatic children's (aged 6–14) contacts with the health service using the unique personal registration number to link data from five national registries. The prevalence ratios were calculated for associations between provider (general practitioner, primary care specialist, hospital specialist or both GP and specialist) and adherence with guidelines concerning three indicators of quality of care pathway: 1) diagnostic examination of lung function at start of medical treatment 2) follow-up the first six months and 3) follow-up the next six months. The associations were adjusted for sex, age, socioeconomic status, county, and severity of disease.

Results

Most children (70.3%) had only been seen by their GP. About 80% of the children were treated with inhaled steroids, 70% were treated with inhaled steroids as well as inhaled beta2agonists and 13% were treated with inhaled beta2agonists only. A total of 12,650 children (34.2%) had no registered asthma-related contacts with the health service except when redeeming prescriptions. Care was in accordance with guidelines in all three indicators of quality in 7% of the cases (GPs only: 3%, primary care specialists only: 16%, hospital specialists: 28%, and both GP and specialists: 13%). Primary care specialists had a 5.01, hospital specialists a 8.81 and both GP and specialists a 4.32 times higher propensity to provide a clinical pathway according to guidelines compared to GPs alone.

Conclusion

The majority of the children were seen in general practice. Hospital specialists provided care in accordance with guidelines nine times more often compared with GPs, but still only one quarter of these children had pathways in accordance with guidelines. It is relevant to study further if these lacks of adherence to guidelines have implications for the asthmatic children or if guidelines are too demanding concerning frequency of follow-up or if asthmatic children should be stratified to different care pathways.