Health care utilization by children with chronic illnesses: a comparison of medicaid and employer-insured managed care

Healthcare use by children with attention deficit/hyperactivity disorder with and without psychiatric comorbidities

This study examined healthcare services used by children with attention-deficit/hyperactivity disorder (ADHD), with and without psychiatric comorbidities. The study was conducted in a large health maintenance organization in the Pacific Northwest on all continuously enrolled children aged 5 to 12 from January 1997 through July 1998. The study measured all outpatient medical care, specialty mental health care services, and prescription drug dispensings from computer records. Children with ADHD, with and without other psychiatric comorbidities, use more general medical services than do other groups of children, including outpatient visits, acute care (emergency room [ER] urgent care) visits. ADHD and other psychiatric comorbidities lead to higher use of specialty mental health services and greater use of psychotropic medications.

Emergency department use among Michigan children with special health care needs: an introductory study

OBJECTIVE

To describe patterns of emergency department (ED) use among children dual-enrolled in Medicaid and Michigan's Children's Special Health Care Services (CSHCS).

DATA SOURCES

Individual claims and enrollment data from Michigan's Medicaid and CSHCS programs for the period January 1, 1998, to June 30, 1999. Claims data were linked with eligibility data and then used to develop a 100 percent sample of claims for individuals enrolled in both Medicaid and CSHCS.

STUDY DESIGN

Poisson regression analysis was used to examine the rate of ED use for dual-enrolled children. A time-varying hazard analysis was also used to examine the impact of changes over time. The key variables were gender, age, race, county of residence, Medicaid eligibility category, and qualifying diagnosis.

PRINCIPAL FINDINGS

Dual-enrolled children under one year of age, and those with qualifying diagnoses of anemia, hemophilia, asthma, epilepsy, and juvenile diabetes displayed especially high rates of ED use. Significant geographic variation in ED use remained after controlling for qualifying diagnoses, race/ethnicity, and other factors. African Americans displayed higher rates of ED utilization than non-Hispanic whites. Supplemental Security Income (SSI) recipients demonstrated higher utilization than other groups.

CONCLUSIONS

Children dually enrolled in CSHCS and Medicaid face diverse challenges of both poverty and chronic illness. Differences in patterns of use highlight the importance, but also the difficulty, of developing systems of care to manage complex chronic conditions in low-income populations.

Correlates of use of specialty care

OBJECTIVE

This study examines patterns of specialist use among children and adolescents by presence of a chronic condition or disability, insurance, and sociodemographic characteristics.

DESIGN

Cross-sectional analysis of national survey data, describing rates of specialist use, with logistic regressions to examine associations with having a chronic condition or disability, insurance status, and sociodemographic variables.

SETTING

The 1999 National Health Interview Survey, a nationally representative household survey.

PARTICIPANTS

Children and adolescents 2 to 17 years old.

OUTCOME

Parental/respondent reports of specialist visits based on reports of the child having seen or talked to a medical doctor who specializes in a particular medical disease or problem about the child's health during the last 12 months.

RESULTS

Thirteen percent of US children were reported as seeing a specialist in the past year. Specialist-visit rates were twice as high for children with a chronic condition or disability (26% vs 10.2%). The specialist utilization rates for children without insurance were much lower than those for insured children, but among the children who have coverage (private, Medicaid, or other), specialist-utilization rates were similar (no statistically significant difference). Results of multivariate analyses predicting the use of specialists confirm the above-mentioned findings. Additionally, they show that use of specialist care was lower among children in the middle age group, minorities, children in families between 100% and 200% of the federal poverty level, and lower parental educational levels. We found no difference in specialist-visit rates between rural- and urban-dwelling children, by family status, or by gender. Differences in specialist use by gatekeeping status are found only among subgroups.

CONCLUSIONS

The results showed that, overall, 13% of children used a specialist in a year. Among the insured, a slightly greater percentage of children used such care (15%). These numbers were slightly lower than the 18% to 28% of pediatric patients referred per year in 5 US health plans, although the sources of data and definitions of specialist use differ. Our results showed that 26% of children with a chronic condition or disability who were insured by Medicaid use a specialist. Although the data are not directly comparable, this is within the range of previous findings showing annual rates by condition of use between 24% and 59%. These findings are consistent also with greater use of many different types of health care by children with special health care needs. Medicaid-utilization rates presented here were similar also to the rates found among privately insured children and children with "other" insurance. In our earlier work examining use of specialists by children insured by Medicaid, we speculated that Medicaid-insured children might face particular difficulty with access (eg, due to transportation or language barriers). The findings presented here suggest that children insured by Medicaid had no different use of specialists than other insured children. We do not know, however, whether similar rates are appropriate. As predicted, sociodemographic differences were pronounced and followed patterns typically found for use of health services. Lower rates of specialist use by non-Hispanic blacks and Hispanics remains even, controlling for chronic condition/disability, status, insurance, and socioeconomic status. This is an important issue that not only needs to be addressed in using specialist care but also in many areas in health care. It is the near poor who seem to have difficulty accessing care (as is evidenced by lower use of specialists). In a study of access to care, similar results were found, with those between 125% and 200% of the federal poverty level being less likely to have a usual source of care. This is roughly the population targeted by the State Children's Health Insurance Programs. These findings cannot determine whether rates of use are too high or too low. Additional work on outcomes for children who do and do not use specialist care would further inform the work presented here. Extending that work to examine patterns of care including but not limited to specialists and generalists would be even better.

Misconceptions about colds and predictors of health service utilization

OBJECTIVE

Colds accounted for 1.6 million emergency department (ED) visits and 25 million ambulatory visits by children and adults in 1998. Although most colds are caused by viruses and do not require medical intervention, many families seek health care for the treatment of colds. Parental misconceptions about the cause and appropriate treatment of colds may contribute to unnecessary health service utilization. The objective of this study was to determine predictors of reported ED use and ambulatory care use for colds among families with young children.

METHODS

This study was an observational, prospective cohort study to determine attack rates for respiratory illnesses within families that have at least 1 child who is 6 months to 5 years of age and enrolled in out-of-home child care. Families were randomly selected from 5 pediatric practices in Massachusetts and were considered eligible when the child was enrolled in child care with at least 5 other children for >or=10 hours per week. Enrolled families were asked to complete a survey that assessed knowledge about colds, antibiotic indications, and frequency of health service utilization. Predictors of self-reported use of health care services were assessed in multivariate logistic regression models.

RESULTS

Of the 261 families enrolled in the study, 197 families (75%) returned completed surveys. Although 93% of parents understood that viruses caused colds, 66% of parents also believed that colds were caused by bacteria. Fifty-three percent believed that antibiotics were needed to treat colds. Parents reported that they would visit the ED (23%) or their doctor's office (60%) when their child had a cold. Predictors of ED use on multivariate analysis included Medicaid insurance (odds ratio [OR]: 17.6 [2.2-139.3]), history of wheezing (OR: 18.3 [4.4-75.8]), and belief that antibiotics treat colds (OR: 4.2 [1.4-12.9]). Predictors of ambulatory care use included parent younger than 30 years (OR: 10.0 [1.6-64.3]), history of wheezing (OR: 5.6 [1.1-29.7]), and belief that antibiotics treat colds (OR: 3.8 [1.7-8.5]).

CONCLUSIONS

Misconceptions about the appropriate treatment of colds are predictive of increased health service utilization. Targeted educational interventions for families may reduce inappropriate antibiotic-seeking behavior and unnecessary health service utilization for colds.

Air pollution and emergency department visits for asthma among Ohio Medicaid recipients, 1991-1996

We examined the effects of nitrogen dioxide (NO(2)), ozone (O(3)), particulate matter of <10 microm aerodynamic diameter (PM(10)), and sulfur dioxide (SO(2)) on asthmatics ages 5-34 years enrolled in Medicaid in Cincinnati, Cleveland, and Columbus, OH (N=5416). Our study period was for the summer months, June-August, from July 1, 1991 to June 30, 1996. We preformed Poisson regression analyses for the number of daily emergency department (ED) visits for asthma in each city and on the aggregate data controlling for time trends and minimum temperature. We found a 12% increased likelihood of an asthma ED visit per 50 microg/m(3) increase in PM(10) in Cleveland [95% confidence interval (CI)=0-27%] and a 35% increase per 50 microg/m(3) increase in SO(2) in Cincinnati (95% CI=9-21%). When data were analyzed for all three cities combined, the risk of an ED visit increased for all pollutant increases and specifically by 12% (95% CI=1-23%) per 50 microg/m(3) increase in SO(2). Attributable risk estimates show a five times greater impact on Cleveland over Cincinnati or Columbus. Between 1991 and 1996, air pollutants in Cincinnati, Cleveland, and Columbus increased ED visits for asthmatics enrolled in Medicaid.

Factors associated with emergency department use in asthma: acute care interventions improving chronic disease outcomes

OBJECTIVE

To provide a literature review of the factors associated with childhood asthma-related emergency department (ED) visits and to identify elements of effective ED interventions that reduce the frequency of childhood ED visits while increasing primary health care utilization.

DATA SOURCE

English Medline articles from 1990 that cross-referenced with the terms asthma, emergency, intervention, pediatric, and/or acute care. Experts in the field of allergy and asthma were also consulted.

STUDY SELECTION

Childhood asthma interventions in the ED.

RESULTS

Factors associated with childhood asthma-related ED visits include being impoverished, being exposed to allergens, receiving Medicaid or lacking insurance, being noncompliant with self-management skills, and having an African-American heritage. Other minorities may also be at risk, but further investigation is required to determine the extent. Attempts to link the patient to primary health care by the ED staff resulted in increased adherence to followup care.

CONCLUSIONS

The ED provides an opportunity to help patients and families deal with asthma to improve their quality of life. Further, current studies demonstrate that the ED is an appropriate setting for an intervention that links the patient back to the primary health care provider. More research is needed on the appropriate educational messages to be delivered in ED. Also, barriers to followup care and regular use of a primary health care provider need to be identified so that future intervention designs can address these issues.

Rising prevalence of antidepressants among US youths

OBJECTIVE

To examine changes in antidepressant (ATD) prevalence and the sociodemographic and clinical correlates of ATD use among youths who are treated in community practice settings.

METHODS

A retrospective study was undertaken using large data sets from 3 US sites. Outpatient prescription and clinical service records of youths who were aged 2 to 19 and enrolled in Midwestern Medicaid (MWM) and mid-Atlantic Medicaid (MAM) state programs and a group-model health maintenance organization (HMO) were organized into seven 1-year cross-sectional data sets from 1988 through 1994 to evaluate ATD utilization patterns.

RESULTS

In 1994, ATD prevalence per 1000 youths was 19.10 (MWM), 17.78 (MAM), and 12.85 (HMO), which represented a consistent increase in prevalence from 1988-1994: 2.9-fold (MWM), 4.6-fold (MAM), and 3.6-fold (HMO). Despite the rapidly expanding use of selective serotonin reuptake inhibitors prescribed mainly for depression, more than half of ATD use in 1994 was still attributable to tricyclic antidepressants prescribed mainly for attention-deficit/hyperactivity disorder. ATD prevalence was generally predominant among 10- to 14-year-old boys and among 15- to 19-year-old girls. In the Medicaid populations, 42% (MAM) and 72% (MWM) of ATD-treated youths had primary care services, whereas the bulk of the remainder had psychiatric services. Attention-deficit/hyperactivity disorder followed by depression led the physician-reported primary care diagnoses associated with ATD use, whereas that diagnostic rank order was reversed for youths who received psychiatric services.

CONCLUSIONS

ATD treatments among youths substantially increased in the 1990s. This was generated primarily by primary care providers, and thus evaluations of the outcome of ATD treatment need to target primary care in addition to psychiatric providers. Longitudinal study designs are needed to evaluate the use of ATDs in youths in regard to the duration of treatment, combination medications, and the reasons for treatment.

Organizational context and taxonomy of health care databases

An understanding of the organizational context and taxonomy of health care databases is essential to appropriately use these data sources for research purposes. Characteristics of the organizational structure of the specific health care setting, including the model type, financial arrangement, and provider access, have implications for accessing and using this data effectively. Additionally, the benefit coverage environment may affect the utility of health care databases to address specific research questions. Coverage considerations that affect pharmacoepidemiologic research include eligibility, the nature of the pharmacy benefit, and regulatory aspects of the treatment under consideration.