Reducing childhood asthma through community-based service delivery—New York City, 2001-2004

Morbidity and Mortality Weekly Report, Jan 14, 2005 by S.W. Nicholas, V.E. Hutchinson, B. Ortiz, S. Klihr-Beall, B. Shoemaker Jean-Louis, K., C. Singleton, J. Credell, R. Swaner, R.D. Vaughan, M.E. Northridge, L.F. Cushman, E. Polley, C. Golembeski

Since 1980, asthma prevalence, hospitalization, and mortality have been increasing in the United States (1). Because of concern about asthma-related morbidity among children in Central Harlem, New York City (NYC), the Harlem Children's Zone Asthma Initiative (HCZAI) was established in 2001 to reduce asthma-related morbidity through improved surveillance, health-care use, and health-care service delivery for children aged [less than or equal to] 12 years living in a 60-block radius of Central Harlem known as the Harlem Children's Zone Project *. Families of children with asthma or asthma-like signs ([dagger]) or physical findings consistent with asthma are invited to participate in the program. This report summarizes preliminary data collected during 2001-2004 on the effectiveness of the program in reducing asthma-related morbidity; data indicate decreased parental/guardian reports of school absences among children enrolled in the program, both for any reason and because of asthma. In addition, emergency department and unscheduled physician office visits for treatment of asthma decreased from 35% to 8% after 18 months of the program, indicating improved asthma management and appropriate use of healthcare services by program enrollees. The effectiveness of HCZAI underscores the utility of community-based public health programs in reducing asthma morbidity.

Potential participants in HCZAI are identified through screening of all children aged [less than or equal to] 12 years who live or attend school in the Harlem Children's Zone Project or participate in any Harlem Children's Zone, Inc., program (2). Screening consists of a written survey completed by a parent/guardian and a physical examination of the child conducted by a physician or nurse (6). Participation rates for the various sites ranged From 66% to 100%, with 88% of parents/guardians consenting to physical examination of their children.

Because of the large number of children identified with asthma or asthma-like signs, participation is prioritized for children with recent symptoms. Over time, all eligible children may enroll and participate in the program. As part of HCZAI, a pediatric asthma team (including four community workers, a social worker, a nurse, and three physicians) offers medical, educational, environmental, social, and legal services to families of enrolled children. Among participants, monitoring of 13 selected indicators (Table 1) of asthma symptoms and management strategies is conducted via home visits by community workers who interview the parents/guardians of enrolled children at 3-month follow-up intervals (7,8). Prevalence estimates for item responses were calculated by using statistical software. To assess changes in the prevalence of asthma symptoms and management strategies over time, chisquared tests on five degrees of freedom were calculated; significance levels were replicated by using repeated measures models in statistical software.

As of September 2004, a total of 3,132 children had been screened; of these, 982 (31.4%) had asthma or asthma-like signs, and 314 (10.0%) were enrolled in HCZAI (Table 2). Program enrollees were more likely than nonenrollees to have health insurance (87.0% versus 67.8%). Approximately 32.3% of children enrolled in the program had a household member who smoked at the time of screening, compared with 20.8% of children not enrolled and 16.4% of children without asthma or asthma-like signs.

Preliminary data are available on the effectiveness of HCZAI in reducing asthma morbidity, as measured for all 13 selected asthma symptoms and management strategies at six 3-month follow-up time points (18 months) (Table 1). Because children were enrolled sequentially, data are not yet available for 18 months of follow-up for all 314 enrolled children.

School absences reported by the parents/guardians of enrollees declined during the preceding 14 days, both for any reason (from 34.4% to 16.0% in 18 months) and because of asthma (from 23.3% to 8.0% in 18 months). In addition, emergency department and unscheduled physician office visits for treatment of asthma decreased from 35.0% to 8.0% in 18 months, indicating improved asthma management and appropriate use of health-care services by program enrollees. Reported use of asthma management strategies (e.g., using a spacer device ([section]) and having an asthma action plan) by parents/guardians of enrolled children increased substantially over time (Table 1).

Editorial Note: Since 2001, HCZAI has documented both a high prevalence (>30%) of childhood asthma or asthma-like signs among children in the Harlem Children's Zone Project and has substantially decreased asthma symptoms and increased asthma management strategies for enrolled children during the first 18 months of follow-up. Nonetheless, 668 children with asthma or asthma-like signs identified through screening have yet to be enrolled in HCZAI, and children aged [less than or equal to] 12 years in other Harlem Children's Zone Project schools remain to be screened for asthma and potentially enrolled. An expanded program model is planned for ensuing years.