Overcoming childhood asthma disparities of the inner-city poor

Effects of prenatal polycyclic aromatic hydrocarbons and childhood material hardship on reading achievement in school-age children: A preliminary study

Background

Children from socioeconomically disadvantaged backgrounds are at elevated risk for reading problems. They are also likely to live in neighborhoods with high levels of air pollution and to experience material hardship. Despite these risk factors, the links between prenatal chemical exposures, socioeconomic adversities, and reading problems in youth from disadvantaged backgrounds remain understudied. Here we examine associations between prenatal exposure to polycyclic aromatic hydrocarbons (PAH), a common air pollutant, and reading skills, and determine if this relationship is exacerbated by material hardship among Black and/or Latinx children who have been followed as part of a longitudinal urban birth cohort.

Methods

Mothers and their children, who were participants in a prospective birth cohort followed by the Columbia Center for Children's Environmental Health, were recruited for the current study. Personal prenatal PAH exposure was measured during the third-trimester of pregnancy using a personal air monitoring backpack. Mothers reported their level of material hardship when their child was age 5 and children completed measures of pseudoword and word reading [Woodcock Johnson III Tests of Achievement (WJ-III) Basic Reading Index] at age 7. We used multiple linear regression to examine the effects of the interaction between prenatal PAH and material hardship on Basic Reading Index, controlling for ethnicity/race, sex, birthweight, presence of a smoker in the home (prenatal), and maternal education (prenatal) (N = 53).

Results

A prenatal PAH × material hardship interaction significantly associated with WJ-III Basic Reading Index scores at age 7 (β = -0.347, t(44) = -2.197, p = 0.033). Exploratory analyses suggested that this effect was driven by untimed pseudoword decoding (WJ-III Word Attack: β = -0.391, t(44) = -2.550, p = 0.014).

Conclusion

Environmental chemical exposures can be particularly toxic during the prenatal period when the fetal brain undergoes rapid development, making it uniquely vulnerable to chemical perturbations. These data highlight the interactive effects of environmental neurotoxicants and unmet basic needs on children's acquisition of reading skill, specifically phonemic processing. Such findings identify potentially modifiable environmental risk factors implicated in reading problems in children from economically disadvantaged backgrounds.

An application of the Biobehavioral Family Model: Examining the impact of maternal depression on child asthma mediated by insecure attachment and child depression

OBJECTIVE

Child asthma disparities are prevalent in socio-economically stressed single-parent families. Stress impacts childhood asthma mediated by immune and autonomic pathways, but specific family stress pathways are not well established. This study tests the hypothesis, derived from a version of the Biobehavioral Family Model, that single parent maternal depression impacts child asthma mediated by insecure attachment and child depression.

METHODS

In a cross-sectional study, children with asthma (age 7-17 years old) from a socio-economically disadvantaged population and their single parent mothers (N = 202) were assessed for depression and attachment security. Child asthma disease activity was assessed by symptom report and lung function tests. Structural equation modeling (SEM) was used to test a model in which caregiver depression impacts child asthma disease activity mediated by insecure attachment and child depression.

RESULTS

SEM results indicated that maternal depression statistically predicted child depression (β = 0.21, p < 0.01) and insecure mother-child attachment (β = 0.17, p < 0.05). In addition, insecure attachment statistically predicted child depression (β = 0.50, p < 0.001). Child depression mediated the adverse effects of maternal depression and insecure attachment on child asthma disease activity (β = 0.43, p < 0.01). There was no direct effect of insecure attachment on child asthma.

CONCLUSION

In single-parent families, maternal depression may impact child asthma disease activity, mediated serially by insecure attachment and child depression. Longitudinal and/or intervention studies are needed to establish a causal effect. These findings suggest that caregiver depression and parent-child relationships may be important targets for family intervention. These interventions may help improve child asthma outcomes and reduce health disparities.

Severe Asthma in Childhood

Severe asthma is broadly defined as asthma requiring a high level of therapy, usually high doses of inhaled corticosteroids, to bring under control. Children who remain symptomatic despite such treatment are a heterogeneous population, and bear a high burden of disease and require high resource utilization. Children with severe asthma require a comprehensive evaluation, careful consideration of alternative diagnoses and comorbid conditions, assessment of medication adherence and environmental conditions, and frequent disease monitoring.

Psychosocial Factors in Severe Pediatric Asthma

Asthma is the most common chronic illness among children in the United States and can impact nearly all aspects of functioning. Most research suggests that children with severe asthma display more emotional and behavioral problems than their healthy peers. These psychological difficulties are associated with increased risk for functional impairments and problematic disease course. Multidisciplinary teams that assess and treat these psychosocial factors using psychoeducational and behavioral interventions are important for children whose asthma is poorly controlled. Future research should examine the ways in which stress, emotions, and immune functions interact, so as to develop more preventative interventions.

Sociodemographic Factors Mediate Race and Ethnicity-associated Childhood Asthma Health Disparities: a Longitudinal Analysis

BACKGROUND

Race and ethnicity-based disparities in childhood asthma are well established. We characterized the longitudinal effects associated with being African-American/Black or Hispanic/Latino on a range of asthma outcomes, and the extent to which sociodemographic factors, caregiver health literacy, education level, and asthma knowledge mediate these associations.

METHODS

Children ages 8-15 and their caregivers (n = 544) in the Chicago Initiative to Raise Asthma Health Equity (CHIRAH) cohort completed interviews every 3 months for 1.5 years. Health literacy was measured with the Rapid Estimate of Adult Literacy in Medicine (REALM). Other covariates include sex, age, education level, income, smoke exposure, asthma duration, employment status, and insurance status. We conducted a series of models to evaluate these factors as mediators of the relationship between race/ethnicity and (1) asthma knowledge, (2) asthma-related quality of life, (3) asthma severity, and (4) asthma control based on NAEPP/EPR-3 2007 guidelines.

RESULTS

African-American race and Hispanic/Latino ethnicity were significantly associated with all outcomes when compared to Whites. Adjusting for sociodemographic factors resulted in the most significant mediation of racial/ethnic disparities in all outcomes. Health literacy was a partial mediator of race/ethnic disparities in asthma knowledge and asthma-related quality of life. Asthma knowledge remained significantly associated with race and ethnicity, and race remained associated with asthma-related quality of life.

CONCLUSIONS

African-American race and Hispanic/Latino ethnicity are significantly associated with worse asthma compared to Whites in longitudinal analyses. Sociodemographic factors are potent mediators of these disparities, and should be considered when designing interventions to reduce asthma disparities. Health literacy and education level are partial mediators.

Can a Short Video Improve Inhaler Use in Urban Youth?

OBJECTIVE

The primary aim was to determine whether watching a short video in the inpatient setting could produce an immediate improvement in pediatric patients' asthma knowledge and inhaler technique.

METHODS

This prospective, quasi-experimental, pre-post study was conducted in a single center, in Detroit, Michigan, which primarily serves an urban, African-American population. Patients were eligible if they were between 8- and 16-years-old, had asthma, and would be discharged with an albuterol metered-dose inhaler. The primary outcome was improvement in the composite score of a knowledge and technique assessment before and after watching a 5-minute video. The lead author developed the video with content validation by pharmacists, pediatricians, elementary school teachers, and a pediatric health education specialist. Secondary outcomes at 30 days included change in asthma control and whether the video was revisited after discharge.

RESULTS

Thirty patients were enrolled. Their average age was 11 ± 2.1 years; they were primarily African American (83%), female (53%), and insured by Medicaid (87%). The composite score of technique assessment and written quiz increased by 3.53 (95% confidence interval [CI] 2.81 to 4.85) of a possible 16 points after watching the video. There was no significant change in asthma control at 30 days as measured by the asthma control test (2, 95% CI -0.53 to 4.53). Eight of 22 patients revisited the video after discharge.

CONCLUSIONS

A brief educational video delivered during a pediatric inpatient visit in an urban medical center resulted in an immediate improvement in patients' disease knowledge and inhaler technique.

Identifying barriers to chronic disease reporting in Chicago Public Schools: a mixed-methods approach

BACKGROUND

Chronic disease among school-aged children is a public health concern, particularly for asthma and food allergy. In Chicago Public Schools (CPS), rates of asthma and food allergy among students are underreported. The aim of this study was to determine the barriers to chronic disease reporting as experienced by CPS parents and school nurses.

METHODS

A mixed-methods approach included focus groups and key informant interviews with parents and school nurses, and a cross-sectional survey was completed by parents. Qualitative data analysis was performed and survey data were analyzed to determine the significant demographic and knowledge variables associated with successfully completing the reporting process.

RESULTS

The three main barriers identified were 1) a lack of parental process knowledge; 2) limited communication from schools; and 3) insufficient availability of school nurses. Parents were significantly more likely to successfully complete the reporting process if they knew about special accommodations for chronic diseases, understood the need for physician verification, and/or knew the school nurse.

CONCLUSIONS

These findings suggest that increasing parental knowledge of the reporting process will allow schools to better identify and manage their students' chronic conditions. A parent-focused intervention informed by these results has been completed.

Prenatal exposure to airborne polycyclic aromatic hydrocarbons and IQ: estimated benefit of pollution reduction

Outdoor air pollution, largely from fossil fuel burning, is a major cause of morbidity and mortality in the United States, costing billions of dollars every year in health care and loss of productivity. The developing fetus and young child are especially vulnerable to neurotoxicants, such as polycyclic aromatic hydrocarbons (PAH) released to ambient air by combustion of fossil fuel and other organic material. Low-income populations are disproportionately exposed to air pollution. On the basis of the results of a prospective cohort study in a low-income population in New York City (NYC) that found a significant inverse association between child IQ and prenatal exposure to airborne PAH, we estimated the increase in IQ and related lifetime earnings in a low-income urban population as a result of a hypothesized modest reduction of ambient PAH concentrations in NYC of 0.25 ng/m(3). For reference, the current estimated annual mean PAH concentration is ~1 ng/m(3). Restricting to NYC Medicaid births and using a 5 per cent discount rate, we estimated the gain in lifetime earnings due to IQ increase for a single year cohort to be US$215 million (best estimate). Using much more conservative assumptions, the estimate was $43 million. This analysis suggests that a modest reduction in ambient concentrations of PAH is associated with substantial economic benefits to children.

Differing asthma prevalence by gross national index of country of birth among New York City residents

BACKGROUND

The hygiene hypothesis suggests that higher exposure to infectious agents may be one reason for regional differences in asthma. This would suggest that immigrants from less developed countries, where infections are more common, to highly developed countries will have lower risk of asthma compared with natives, as has been found in a number of studies. We expand the research on immigrants to look at the level of development in country of origin as a predictor of asthma in New York City residents.

METHODS

Data came from the 2009 cross-sectional Community Health Survey. We used logistic regression to assess the relationship of country of birth and the gross national income (GNI), an indicator of the level of development, of country of birth with asthma among immigrants and US-born New York City residents.

RESULTS

Those who were foreign born had lower odds of having asthma compared with those US born (OR = 0.43, P < 0.001). There was a dose relationship between GNI and asthma with decreasing odds of having asthma associated with lower GNI in country of birth (low GNI country: OR = 0.26, P = 0.014; middle GNI country: OR = 0.36, P < 0.001; and high GNI country = reference).

CONCLUSIONS

These findings lend support to the hygiene hypothesis in that the odds of having asthma among New York City residents was lowest among people born in the least developed countries, as indicated by GNI, where infections are likely the most common.

Asthma coalition effects on vulnerable sub groups of children: the most frequent users of health care and the youngest

OBJECTIVE

To examine the impact of Allies Against Asthma, community-based coalitions working to improve asthma outcomes, on vulnerable children: those with the most urgent health care use and those of youngest age.

METHODS

Allies zip codes were matched with comparison communities on demographic factors. Five years of Medicaid data (n = 26,836) for significant health care events: hospitalizations, ED and urgent care facility visits, were analyzed. Longitudinal analyses using generalized estimating equations and proportional hazards models compared Allies and comparison group children.

RESULTS

In the two start-up years of Allies, odds of having a significant event were greater for Allies children than for comparison children (p < 0.05). During the third and fourth years when Allies activities were fully implemented, for frequent health care users at baseline, odds of an asthma event were the same for both Allies and comparison children, yet in the less frequent users, odds of an event were lower in Allies children (p < 0.0001). In the initial year of Allies efforts, among the youngest, the Allies children had greater odds than comparison children of an event (p < 0.01), but by the fourth year the Allies group had lower odds (p = 0.02) of an event. Hazard ratios over all years of the study for the youngest Allies children and most frequent baseline users of urgent care were lower than for comparison children (p = 0.01 and p = 0.0004).

CONCLUSION

Mobilizing a coalition of diverse stakeholders focused on policy and system change generated community-wide reductions over the long-term in health care use for vulnerable children.

The association of overweight and obesity with spirometric values in minority children referred for asthma evaluation

BACKGROUND

Overweight, obesity, and asthma are more prevalent in minority children; yet, the association of overweight and obesity with spirometric values in asthmatic minorities is not well characterized.

OBJECTIVE

To study the relationship between weight, ethnicity, and spirometric values in children referred for asthma evaluation to a large inner-city hospital in Bronx, NY.

METHODS

Retrospective review of spirometry done at the first pulmonary clinic visit of 980 asthmatic children, aged 7-20 years, was conducted. Linear regression analysis was performed to elucidate the association of overweight and obesity with pulmonary function among Whites, African Americans, and Hispanics compared with their normal weight counterparts.

RESULTS

More African Americans (58%) and Hispanics (65.4%) were overweight and obese than Whites (51.2%) (p < .05). Compared with their normal weight counterparts, percent forced expiratory volume in the 1st second (FEV(1))/forced vital capacity (FVC) ratio was lower in both overweight and obese African Americans (2.99%, p < .05 and 3.56%, p < .01, respectively) and Hispanics (2.64%, p < .05 and 2.36%, p < .05, respectively); these differences were found in obese (3.73%, p < .05) but not in overweight (0.68%, p = .7) Whites.

CONCLUSIONS

FEV(1)/FVC ratio was lower in both overweight and obese African American and Hispanic children, while this association was present only among obese Whites compared with their normal weight counterparts. These results suggest that spirometric measures of lower airway obstruction decrease with smaller weight increments in minority children when compared with White children. In the context of the higher prevalence of overweight and obesity among African Americans and Hispanics, our findings offer one potential explanation for increased asthma among minority children.

Novel severe wheezy young children phenotypes: boys atopic multiple-trigger and girls nonatopic uncontrolled wheeze

BACKGROUND

Recurrent wheezing during infancy is a heterogeneous disorder that has been associated with early-onset asthma.

OBJECTIVE

To identify phenotypes of severe recurrent wheezing and therapeutic approaches.

METHODS

We performed cluster analysis with 20 variables of 551 children with active asthma, younger than 36 months old, and enrolled in the Trousseau Asthma Program.

RESULTS

We identified 3 independent clusters of children with wheezing. Cluster 1, mild episodic viral wheeze (n= 327), consisted of children with wheezing related only to colds (71%), mild disease (76%), and mainly normal chest x-ray results. Cluster 2, nonatopic uncontrolled wheeze (n = 157), was characterized by moderate to severe disease (91%), uncontrolled wheezing despite high doses of inhaled corticosteroids (55%), parents with asthma, and increased levels of ferritine. Cluster 3, atopic multiple-trigger wheeze (n = 67), included more children with multiple-trigger wheeze (68%) than did clusters 1 or 2; eczema (75%); a positive result from the Phadiatop Infant test (90%); increased levels of IgE, IgA, and IgG; and abnormal results from chest x-rays. In separate analysis, 1 parameter for boys (increased total level of IgE) and 2 parameters for girls (wheezing severity and increased total level of IgE) properly classified 90% of boys and 83% of girls in the appropriate cluster. Significant associations were found between overcrowding, molds and cockroaches at home, and atopic multiple-trigger wheeze and between day-care attendance and nonatopic uncontrolled wheeze in other parts.

CONCLUSION

We identified different phenotypes of recurrent wheezing in young children by using cluster analysis with usual variables. These phenotypes require confirmation in longer, follow-up studies.

Availability of Asthma Quick Relief Medication in Five Alabama School Systems

OBJECTIVES: This paper documents individual asthma action plan presence and quick relief medication (albuterol) availability for elementary students enrolled in five Alabama school systems. PATIENTS AND METHODS: Data were obtained during baseline data collection (fall 2005) of a school-based supervised asthma medication trial. All students attended 1 of 36 participating elementary schools across five school systems in Jefferson County, Alabama. In addition, they had to have physician-diagnosed asthma requiring daily controller medication. Each school system had its own superintendent and elected school board. Asthma action plan presence and albuterol availability was confirmed by study personnel. Asthma action plans had to contain daily and acute asthma management instructions. Predictors of asthma action plan presence and albuterol availability were also investigated. Associations between albuterol availability and self-reported characteristics including health care utilization prior to study enrollment and outcomes during the study baseline period were also investigated. RESULTS: Enrolled students had a mean (SD) age of 11.0 (2.1) years, 91% were African American, and 79% had moderate persistent asthma. No student had a complete asthma action plan on file and only 14% had albuterol physically available at school. Albuterol availability was not predicted by gender, race, insurance status, second-hand smoke exposure, need for pre-exercise albuterol, asthma severity, or self-reported health care utilization prior to study enrollment. Albuterol availability did not predict school absences, red/yellow peak flow recordings, or medication adherence during the study's baseline period. CONCLUSION: Despite policies permitting students to possess albuterol, few elementary students across five independent school systems in Alabama actually had it readily available at school.

Racial/ethnic and socioeconomic disparities in the diagnosis and treatment of sleep-disordered breathing in children

OBJECTIVE

Although racial/ethnic and socioeconomic healthcare disparities in pediatric primary care are widely documented, little is known regarding health disparities for common otolaryngic conditions. Pediatric sleep-disordered breathing (SDB) is highly prevalent, associated with significant physical and neurocognitive sequelae, and a common reason for pediatric otolaryngology referral. We sought to synthesize information from published findings related to racial/ethnic and socioeconomic disparities in children with SDB.

METHODS

Qualitative systematic review of MEDLINE database for articles reporting on racial/ethnic or socioeconomic differences in prevalence, diagnosis or surgical treatment of SDB in children over 30 years.

RESULTS

Of 210 abstracts identified, 33 met inclusion criteria. 24 articles directly addressed differences in race/ethnicity and socioeconomic status, and 10 had findings which identified a disparity. Differences were identified in prevalence, sleep patterns, and sequelae of pediatric SDB (24/33) and in access to care and utilization of adenotonsillectomy (10/33). Black children (12/33) and children with socioeconomic deprivation (17/33) were the most common minority groups studied. Although conclusions were broad, common study findings showed: (1) children in racial/ethnic and socioeconomic minorities may have higher prevalence and greater risk for SDB, and (2) In the U.S., white children or children with private insurance are more likely to undergo adenotonsillectomy.

CONCLUSIONS

Racial/ethnic and socioeconomic disparities are prevalent among children with SDB. Disparities in multiracial populations and disparities in access to care, treatment, and utilization of services for pediatric SDB require more detailed investigation. Given the potential negative impact of SDB in children, as well as its economic consequences, the evaluation of disparities should be prioritized in health policy research.

Risk factors for current wheezing and its phenotypes among elementary school children

BACKGROUND

Accumulating evidence suggests, asthma includes many phenotypes with varying clinical and prognostic features. Epidemiological surveys documented a number of environmental risk factors for the development of asthma and interestingly these differ between and within countries, suggesting that the differences may be related with the different distribution of asthma phenotypes. This study aimed to investigate risk factors of current wheezing (CW) and different wheezing phenotypes in elementary school children.

METHODS

Six thousand nine hundred sixty-three 9- to 11-year-old children of a previous multicenter survey where the methodology of the International Study of Asthma and Allergies in Childhood (ISAAC) Phase-II was used were analyzed. Wheezing phenotypes were defined as wheezing with rhinitis (RW), wheezing with rhinoconjunctivitis (RCW), atopic wheezing (AW), non-atopic wheezing (NAW), and frequent wheezing (FW) (≥4/year wheezing episodes).

RESULTS

The prevalence of CW was 15.8% and among these, 22.4%, 67.3%, 45.9%, 20.5%, and 79.5% were classified as FW, RW, RCW, AW, and NAW, respectively. History of parental asthma/allergic rhinitis, coexistence of other allergic diseases, presence of mold and dampness in the house lived during the first year of life and maternal smoking in pregnancy were found to be risk factors for most phenotypes (odds ratio (OR) ranged from 1.43 to 3.56). Number of household in the last year (OR = 1.14), prematurity (OR = 2.08), and duration of breastfeeding (OR = 1.02) per additional month were found to be risk factor for FW, AW, and RCW, respectively.

CONCLUSION

Beside common risk factors for the development of asthma and its phenotypes, certain risk factors appeared to play a role in the development of phenotypic characteristics of asthma. These findings support our hypothesis that each phenotype has not only different clinical characteristics but also has different roots.

Effects of food insecurity on asthma outcomes in the pediatric emergency department

OBJECTIVES

Food insecurity is associated with a wide variety of adverse health conditions in adults and children, but its relationship to asthma outcomes in children has not been described. The objectives of this study were to assess and characterize the food security status of an inner-city asthmatic population and to determine whether and to what extent household food insecurity is independently associated with negative clinical outcomes in children presenting to a pediatric emergency department (ED) with asthma exacerbations.

METHODS

This study is a cross-sectional survey of a convenience sample of families of children presenting to an urban children's hospital ED for asthma exacerbations. Data were gathered through structured chart review and interview, including a published food insecurity questionnaire.

RESULTS

A total of 127 families were enrolled, with a median patient age of 6.6 years. Of all families, 81% were black and 10% were white. Of these families, 35% met criteria for household food insecurity. 78% of food-insecure and 46% of food-secure households received food stamps. Of all food-insecure households, 67% reported never using food pantries or free community meals. 36% of food-insecure and 31% of food-secure patients lacked an adequate home supply of asthma medications. The overall admission rate was 37%; no significant difference was found in admission rate or length of stay.

CONCLUSIONS

The rate of household food insecurity in families of asthmatic children presenting to an urban ED is high, with relatively low participation in a number of safety net programs. This study failed to demonstrate an association between household food insecurity and negative asthma outcomes.

The Child Asthma Link Line: a coalition-initiated, telephone-based, care coordination intervention for childhood asthma

BACKGROUND

Childhood asthma is a complex chronic disease that poses significant challenges regarding management, and there is evidence of disparities in care. Many medical, psychosocial, and health system factors contribute to recognized poor control of this most prevalent illness among children, with resultant excessive use of emergency departments and hospitalizations for care. Recent national guidelines emphasize the need for community-based initiatives to address these critical issues. To address health system fragmentation and impact asthma outcomes, the Philadelphia Allies Against Asthma coalition developed and implemented the Child Asthma Link Line, a telephone-based care coordination and system integration program, which has been in operation since 2001. This study evaluates the effectiveness of the Child Asthma Link Line integration model to improve asthma management by measuring utilization markers of morbidity.

METHODS

Medicaid Managed Care Organization claims data for 59 children who received the Link Line intervention in 2003 are compared to a matched sample of 236 children who did not receive the Link Line intervention. Children in the two study groups are ages 3 through 12 years and matched on 2003 emergency department visits, age, gender, and race/ethnicity. Primary outcome variables analyzed in this study are emergency department visits, hospitalizations, and office visit claims from the follow-up year (2004).

RESULTS

Link Line intervention children were significantly less likely to have follow-up hospitalizations than matched sample children (p = .02). Children enrolled in the Link Line were also more likely to attend outpatient office visits in the follow-up year (p = .045). In addition, Link Line children with multiple emergency department visits in 2003 were significantly less likely to have an emergency department visit in 2004 (p = .046).

CONCLUSION

This coalition-developed, telephone-based, system-level intervention had a significant impact on childhood asthma morbidity as measured by utilization endpoints of follow-up hospitalizations and emergency department visits. Telephone-based care coordination and service integration may be a viable and economic way to impact childhood asthma and other chronic diseases.

Asthma knowledge and asthma management behavior in urban elementary school teachers

BACKGROUND

Although schools are an important setting for asthma care in youth, teachers' asthma knowledge and symptom management is poor. This study investigated the knowledge, prevention and management behaviors, and communication regarding asthma of teachers of low-income, ethnic minority students. It was hypothesized that relative to colleagues whose students did not have active asthma (i.e., did not have symptoms during the day), teachers of students with active asthma would have better asthma knowledge and that more would take asthma prevention steps and communicate with parents and school nurses.

METHODS

Drawing from 25 elementary schools in New York City, 320 pre-Kindergarten through 5th grade classroom teachers with at least one student with asthma completed measures assessing their asthma knowledge, steps taken to manage asthma, communication with the school nurse or parents, information they received about asthma, and whether or not they had at least one student in their class experience asthma symptoms. t test and chi-square were used to test hypotheses.

RESULTS

Asthma knowledge varied among teachers. Most could identify potential triggers, yet few knew that medication taken prior to exercise could prevent symptoms and that students with asthma need not avoid exercise. Communication between teachers and school nurses and between teachers and parents was lacking. Relative to colleagues whose students did not have active asthma, teachers whose students had active asthma had better asthma knowledge, more took steps to prevent students from having asthma symptoms, communicated with parents, and more initiated communication with the nurse.

CONCLUSIONS

Teachers' knowledge about asthma and asthma management is limited, especially among those whose students did not have active asthma. Teachers respond reactively to students who have symptoms in class by increasing prevention steps and communications with parents and the school nurse. A more proactive approach to managing asthma in schools is warranted.

Prenatal airborne polycyclic aromatic hydrocarbon exposure and child IQ at age 5 years

OBJECTIVE

This study evaluated the relationship between prenatal exposure to airborne polycyclic aromatic hydrocarbons (PAHs) and child intelligence.

METHODS

Children of nonsmoking black or Dominican-American women residing in New York City were monitored from in utero to 5 years of age, with determination of prenatal PAH exposure through personal air monitoring for the mothers during pregnancy. At 5 years of age, intelligence was assessed for 249 children by using the Wechsler Preschool and Primary Scale of Intelligence-Revised. Multivariate linear regression models were used to estimate and to test the associations between prenatal PAH exposure and IQ.

RESULTS

After adjustment for maternal intelligence, quality of the home caretaking environment, environmental tobacco smoke exposure, and other potentially confounding factors, high PAH levels (above the median of 2.26 ng/m(3)) were inversely associated with full-scale IQ (P = .007) and verbal IQ (P = .003) scores. Children in the high-exposure group had full-scale and verbal IQ scores that were 4.31 and 4.67 points lower, respectively, than those of less-exposed children (<or=2.26 ng/m(3)). The associations between logarithmically transformed, continuous, PAH levels and these IQ measures also were significant (full-scale IQ: beta = -3.00; P = .009; verbal IQ: beta = -3.53; P = .002).

CONCLUSION

These results provide evidence that environmental PAHs at levels encountered in New York City air can affect children's IQ adversely.

The continuing problem of asthma in very young children: a community-based participatory research project

BACKGROUND

Asthma is a chronic health condition that has a disproportionate effect on low-income minority children who reside in large urban areas. African-American children report significantly higher rates than the general population of children and have more-severe asthma and poorer outcomes. This article describes the prevalence of asthma in a particularly vulnerable group: children aged 2-5 participating in Detroit Head Start programs.

METHODS

Health screens were distributed to caretakers of all children attending 6 Head Start agencies. Caretakers of children identified with active asthma symptoms were asked to complete an in-depth phone interview regarding their child's asthma.

RESULTS

Data collected from 3,254 children (78% African American) revealed that 27% met criteria for probable asthma. Of those with persistent symptoms, 26% were undiagnosed, and 21% were untreated. Baseline data (n = 675) showed that 95% had a regular doctor, but 36% had had no health care visit for asthma in the previous year. Of children with a history of asthma episodes, more than half reported 3 or more episodes in the preceding year. Forty-three percent of caretakers had discussed their child's asthma with Head Start, and 31% had an asthma action plan on file with Head Start.

CONCLUSIONS

Asthma remains a significant problem in this population, especially for African Americans, as evidenced by high levels of undiagnosed children with persistent symptoms and questions regarding the care they receive. Head Start is a way to reach young children with asthma, but may need help to develop the capacity to assist families.

Asthma, environmental risk factors, and hypertension among Arab Americans in metro Detroit

Asthma and obesity-related health problems disproportionately impact low-income ethnic minority communities residing in urban areas. Environmental risk factors, particularly those related to housing and indoor air, may impact the development or exacerbation of asthma. There is increasing evidence to suggest a link between obesity-related health problems and asthma. Previous studies have also reported that immigrant status may influence myriad risk factors and health outcomes among immigrant populations. The Arab American Environmental Health Project (AAEHP) was the first study to explore environmental health problems among Arab Americans. This paper examined whether hypertensive status modified the relationship between environmental risk factors and asthma among Arab Americans in metro Detroit. An environmental risk index (ERI) was used to quantify household environmental risk factors associated with asthma. Physician diagnosed hypertension was self-reported, and asthma status was determined using responses to a validated symptoms checklist and self-reported diagnosis by a physician. Hypertension significantly modified the relationship between ERI and asthma in this study population. The positive association between household environmental risk factors and asthma was stronger among participants diagnosed with hypertension. Effect modification of the relationship between environmental risk factors and asthma could have serious implications among high-risk communities. However, further research is needed to elucidate the relationships between hypertension, environmental risk factors, and asthma.

An exploration of factors underlying asthma care and morbidity: a factor analysis of clinical variables

BACKGROUND

Clinical risk models use recognized risk factors to identify patients at risk for future asthma morbidity. However, the low predictive values of these models suggest an important need to re-evaluate risk assessment strategies.

OBJECTIVE

To use exploratory factor analysis to define underlying factors operative in asthma treatment and morbidity, and characterize their interrelationships and association with 6-month morbidity.

METHODS

Children (n = 197) presenting to an emergency department for an acute asthma episode were followed for 6 months (follow-up data available for 84%). Baseline data included demographics, asthma history, current and past symptoms, and current treatment and management. Factor analysis was used to summarize the underlying relationships between variables. Correlations between factors and 6-month morbidity were calculated.

RESULTS

Factor analysis revealed that 4 factors provided a parsimonious summary of the variables. The factors were labeled current symptom severity, quality of care indicators, previous severe disease, and sociodemographic factors. Positive correlations were observed between quality of care, current symptom severity, and previous severe disease. The factor describing sociodemographic factors was inversely related to current symptom severity and quality of care. Previous severe disease significantly predicted 6-month morbidity.

CONCLUSION

Quality of care was better in subjects with increased current symptoms or previous severe disease, but poorer in individuals with adverse sociodemographic factors. Previous severe disease was the only factor associated with 6-month morbidity, suggesting that current assessment methods do not adequately account for all underlying factors likely operative in asthma morbidity.

Symbicort: a pharmacoeconomic review

OBJECTIVE

This systematic review examines the published evidence on the pharmacoecomonics of Symbicort. Symbicort is a combination inhaler used in asthma and chronic obstructive pulmonary disease (COPD) that contains budesonide and formoterol. In asthma, Symbicort can be used as fixed or adjustable dose maintenance therapy as well as for both maintenance and reliever therapy (SMART).

METHOD

A literature search of PubMed was carried out to find all publications on the pharmacoeconomics of Symbicort. Additional studies were searched for in the reference lists of the papers retrieved and by searching tables of contents of relevant journals. A total of 13 studies on Symbicort in asthma and 2 studies on Symbicort in COPD were found.

RESULTS

Total costs were lower with Symbicort than with separate inhalers containing budesonide and formoterol. Adjustable dosing maintained control of asthma using less medication and was associated with lower treatment costs than fixed dosing with Symbicort or the combination of fluticasone/salmeterol. SMART improves asthma control, reduces exacerbations and reduces direct and indirect costs compared to fixed maintenance therapy with either Symbicort or fluticasone/salmeterol. In COPD, Symbicort offers clinical advantages over therapy with the monocomponents and these are achieved at little or no extra cost.

Does current asthma control predict future health care use among black preschool-aged inner-city children?

OBJECTIVES

Factors predictive of future asthma must be identified among young inner-city children, who suffer disproportionately from asthma. We investigated whether current asthma control predicts future asthma-related health care use among inner-city preschool-aged children with asthma.

METHODS

A total of 150 inner-city preschool-aged children with asthma were followed prospectively for 6 months. At baseline, symptom frequency and reliever-medication use were assessed to classify children into National Asthma Education and Prevention Program-derived control categories. Long-term controller-medication use was also assessed, as well as asthma-related health care use at baseline and at 3 and 6 months.

RESULTS

The mean age was 4.4 years, 92% were black, and 39% reported long-term controller use. At baseline, 37% were classified as having mild-intermittent, 17% had mild-persistent, 21% had moderate-persistent, and 25% had severe-persistent asthma control. Significant changes in asthma control were observed over time, including 46% of children originally categorized with mild-intermittent asthma who had worsened asthma control by 3 months. Asthma control significantly predicted future health care use 3 months later but not 6 months later. Multivariate analyses showed that, once control status was known, reported use of long-term controller medication added little additional predictive value.

CONCLUSIONS

Among inner-city preschool-aged children, significant fluctuations in asthma control occur as early as 3 months after assessment. Poor control but not long-term controller-medication use is an independent predictor of future asthma-related health care use at 3 months but is not significantly predictive of 6-month outcomes. Therefore, clinicians caring for inner-city children with asthma should consider reassessing asthma control at least every 3 months to identify those at highest future risk and to provide early interventions.

The association between contextual socioeconomic factors and prevalent asthma in a cohort of Southern California school children

Spatial variation in childhood asthma and a recent increase in prevalence indicate that environmental factors play a significant role in the etiology of this important disease. Socioeconomic position (SEP) has been associated inversely and positively with childhood asthma. These contradictory results indicate a need for systematic research about SEP and asthma. Pathways have been suggested for effects of SEP on asthma at both the individual and community level. We examined the relationship of prevalent asthma to community-level indicators of SEP among 5762 children in 12 Southern California communities, using a multilevel random effects model. Estimates of community-level SEP were derived by summarizing census block group-level data using a novel method of weighting by the proportion of the block groups included in a community-specific bounding rectangle that contained 95% of local study subjects. Community characteristics included measures of male unemployment, household income, low education (i.e., no high school diploma) and poverty. There was a consistent inverse association between male unemployment and asthma across the inter-quartile range of community unemployment rates, indicating that asthma rates increase as community SEP increases. The results were robust to individual-level confounding, methods for summarizing census block group data to the community level, scale of analysis (i.e., community-level vs. neighborhood-level) and the modeling algorithm. The positive association between SEP and prevalent childhood asthma might be explained by differential access to medical care that remains unmeasured, by the hygiene hypothesis (e.g., lower SES may associate with higher protective exposures to endotoxin in early life), or by SEP acting as a proxy for unmeasured neighborhood characteristics.

The Yes We Can Urban Asthma Partnership: a medical/social model for childhood asthma management

Pediatric asthma programs have struggled to integrate children's medical and social needs. We developed and piloted an integrated team model for asthma care for low-income children through the Yes We Can Urban Asthma Partnership. Program evaluation demonstrated increases in prescribing controller medications (p <0.05), use of action plans (p<0.001), and the use of mattress covers (p<0.001); and decrease in asthma symptoms (p<0.01). Additional changes occurred within the local system of asthma care to support ongoing efforts to improve asthma management. We conclude that pediatric asthma programs can effectively target the social and medical needs of children in a sustainable manner.

The coalition process at work: Building care coordination models to control chronic disease

Asthma is a highly prevalent and frequently misunderstood chronic disease with significant morbidity. Integrating client services at the patient-centered level and using coalitions to build coordinated, linked systems to affect care may improve outcomes. All seven Allies Against Asthma coalitions identified inefficient, inconsistent, and/or fragmented care as issues for their communities. In response, the coalitions employed a collaborative process to identify and address problems related to system fragmentation and to improve coordination of care. Each coalition developed a variety of interventions related to its specific needs and assets, stakeholders, stage of coalition formation, and the dynamic structure of its community. Despite common barriers in forming alliances with busy providers and their staff, organizing administrative structures among interinstitutional cultures, enhancing patient and/or family involvement, interacting with multiple insurers, and contending with health system inertia, the coalitions demonstrated the ability to produce coordinated improvements to existing systems of care.

Effect of prenatal exposure to airborne polycyclic aromatic hydrocarbons on neurodevelopment in the first 3 years of life among inner-city children

Our prospective cohort study of nonsmoking African-American and Dominican mothers and children in New York City is evaluating the role of prenatal exposure to urban pollutants, including polycyclic aromatic hydrocarbons (PAHs) , environmental tobacco smoke (ETS) , and pesticides, in the pathogenesis of neurobehavioral disorders. We used the Bayley Scales of Infant Development to evaluate the effects on child mental and psychomotor development of prenatal exposure to airborne PAHs monitored during pregnancy by personal air sampling. Behavioral development was assessed by the Child Behavior Checklist. We adjusted for potential confounders including sociodemographic factors and prenatal exposure to ETS and chlorpyrifos. Prenatal exposure to PAHs was not associated with psychomotor development index or behavioral problems. However, high prenatal exposure to PAHs (upper quartile) was associated with lower mental development index at age 3 [beta=-5.69; 95% confidence interval (CI), -9.05 to -2.33; p<0.01]. The odds of cognitive developmental delay were also significantly greater for children with high prenatal exposure (odds ratio=2.89; 95% CI, 1.33 to 6.25; p=0.01). General estimated equation analysis showed a significant age times PAH effect on mental development (p=0.01), confirming the age-specific regression findings. Further adjustment for lead did not alter the relationships. There were no differences in effect sizes by ethnicity. The results require confirmation but suggest that environmental PAHs at levels recently encountered in New York City air may adversely affect children's cognitive development at 3 years of age, with implications for school performance.

The Breathmobile: a novel comprehensive school-based mobile asthma care clinic for urban underprivileged children

Urban minority children have higher rates of asthma morbidity due to multiple factors. Many school-based programs have been funded to improve asthma management, especially for these "high-risk" inner-city children with asthma. Here we report the outcomes of the Children's Hospital of Orange County Breathmobile program, which is a school-based asthma program that combines the use of a mobile clinic and a pediatric asthma specialist. Baseline evaluations included a detailed history and physical, skin prick test to common allergens, spirometry measurements, and asthma severity classification based on the current National Asthma Education and Prevention Program guidelines. From April 2002 to September 2005, a total of 1321 children were evaluated for asthma. Analysis of the 1112 (84%) children diagnosed with asthma showed a population mean age of 7.8 years, 81% Latino ethnicity, and 73% with persistent disease. At baseline, only 24% of children with persistent asthma were on daily anti-inflammatory medications, which increased to 78% by the first follow-up visit. In the year prior to entry into the program, 64% had school absenteeism related to asthma (38% >10 days), 45% had emergency room (ER) visits (28% >1), and 19% had hospitalizations (9% >1). There was a significant reduction (p < .001) in the annual rates of ER visits, hospitalizations, and school absenteeism when comparing pre- and postentry into the program. These data suggest that a mobile asthma van clinic at the school site with an asthma specialist could be an effective model in reducing morbidity in the underserved child with asthma. Further studies are necessary to determine whether this model is applicable to other inner-city settings.

Differences in disease outcomes between medicaid and privately insured children: possible health disparities in juvenile rheumatoid arthritis

OBJECTIVE

To determine the relationship between health insurance status and disease outcome in children with juvenile rheumatoid arthritis (JRA).

METHODS

JRA patients followed at a tertiary pediatric rheumatology center were assessed for the number of active joints and number of joints with limited range of motion. Disease activity, patient well-being, and pain were measured. Disability was assessed by the Childhood Health Assessment Questionnaire, health-related quality of life by the Pediatric Quality of Life Inventory (PedsQL) Generic Core Scale, and the PedsQL Rheumatology Module. Health care resource utilization was estimated based on the number of billing events for health services coded in administrative databases; these databases also provided information on patient health insurance status. Children insured by Medicaid or similar state programs for low-income families were considered to have Medicaid status. Disease outcomes of children with Medicaid status was compared with that of children with private health insurance.

RESULTS

Forty (14%) of the 295 children with JRA had Medicaid status. Patients with Medicaid status were more often of nonwhite race (P < or = 0.04) and more frequently had a polyarticular or systemic disease course (P = 0.04) compared with other patients (n = 255). After correction for differences in disease duration, race, JRA onset, and JRA course between groups, children with Medicaid status continued to have significantly higher disability (P < 0.0003), and lower mean PedsQL Generic Core Scale scores (P < 0.05), while health resource utilization appeared similar between groups.

CONCLUSION

Despite apparently similar health resource utilization and joint involvement, Medicaid status is associated with significantly lower health-related quality of life and higher disability in JRA.

Health disparities and differences in asthma: concepts and controversies

Asthma is one of the most common respiratory diseases, with immense social impact. Despite best efforts, asthma prevalence, morbidity, and mortality are increasing in the United States. This is especially the case in select communities which suffer an excess burden of asthma. Studying these groups and attempting to ameliorate the disease burden they suffer has an important moral and social imperative. It also may lend important insight into the complex factors that contribute to asthma outcomes. The factors that affect asthma interact in a complicated manner and require a comprehensive approach that addresses each of them. However, pursuing health disparities research is controversial, and important ethical and operative considerations need to be made by those to engage in health disparities research.

Contrast of pediatric asthma management approaches in a multicultural and collectivistic population

BACKGROUND

Although asthma is the most prevalent chronic illness in childhood and affects approximately 9 million children, the management approaches used by practitioners may not be efficient from the perspective of families. Clinicians often maintain their usual customs of practice, and the context of the clinical encounter is defined in terms of an individual illness management. In collectivistic and multiethnic settings, the extended kin group or extended family shares responsibility for illness management. The goal of this study is to describe health care providers' strategies to manage children with asthma in a multicultural and collectivistic cultural context.

METHODS

Data were obtained through semistructured in-depth practitioner interviews. Western-trained and traditional practitioners participated.

RESULTS

Narrative analysis strategies produced two major themes: 1) fix the asthma and 2) making connections. Practitioners who perceived their responsibility to fix the asthma (make things physiologically normal) often ran into constraints with dealing with the extended family group. Other practitioners who used strategies of making connections often capitalized on the assistance of others to problem-solve the asthma management.

CONCLUSION

In terms of asthma management, the barriers most frequently reported by practitioners were related to the sociocultural and physical environment. There may be vast differences in asthma management approaches for populations from collectivistic cultural orientation.

A historical overview of health disparities and the potential of eHealth solutions

Over the past decade, a rapidly expanding body of literature has demonstrated the existence of disparities in health and health care. While consensus has not emerged regarding the causes of disparities, they are generally thought to be related to sociocultural, behavioral, economic, environmental, biologic, or societal factors. To effectively address disparities, several authorities have suggested the need for greater information technology research and investments. eHealth researchers may be able to make significant contributions in this area through research and its applications. This paper begins with a historical overview of health disparities in the United States and Europe. It then discusses the role that the Internet, and access to the Internet, may play in the genesis of health disparities. Finally, this paper closes with a discussion of the potential benefits of eHealth applications and the possible contributions of the field to overcoming disparities in health and health care.

Thinking Outside the Inhaler: Potential Barriers to Controlled Asthma in Children

Asthma has reached epidemic proportions in the United States, increasing in prevalence especially among children. Despite the development of national goals and practice guidelines, childhood morbidity and mortality associated with asthma has continued to rise at astonishing rates. Effective management of asthma in children requires both improvements in following nationally recognized guidelines and addressing barriers associated with poor control. This article identifies barriers leading to uncontrolled asthma in children. Barriers in communication, education, resources, parental concerns, and psychosocial influences have resulted in nonadherence to national guidelines. Health care professionals have the opportunity to affect asthma management by addressing these barriers and improving the quality of care for children with asthma.

Hygiene hypothesis: fact or fiction?

The hygiene hypothesis of asthma and allergy has recently received a swell of popularity and published supporting evidence, and has been extended to autoimmune conditions of childhood. Broadly stated, naturally occurring infections and microbial exposures might essentially immunize against the development of asthma and allergic and autoimmune diseases. If true, then reductions in nature's immunotherapy over the past century might be a major factor in the global increase of these conditions (eg, the higher prevalence of asthma and allergies in urban metropolitan areas compared with rural and farm communities) and might lead to new therapies for these conditions. Although such a unifying hypothesis has great appeal, currently it is only speculation about what might be at the end of the investigative road. How close are the current studies to establishing a causal relationship between microbial exposures and a reduction in allergic, asthmatic, and autoimmune disease prevalence? A systematic epidemiologic appraisal of the current hygiene hypothesis evidence can provide a critical analysis of what is currently known and an investigative blueprint for future studies that can ultimately prove causation and improve recommendations, interventions, and therapies.