El estudio se inició en 1991 con unos 3.000 niños urbanos asmáticos. Desde 1996 se ha centrado en evaluar dos métodos para mejorar la salud de estos pacientes. Uno de ellos implica la intervención periódica del médico, que se informa regularmente por teléfono –cada dos meses- del estado de salud del niño, recomendando los cambios en el régimen terapéutico que considere necesarios.
El segundo método, denominado intervención ambiental, implica la identificación y eliminación de los desencadenantes del asma, como el humo del tabaco o las cucarachas del hogar del paciente.
Los datos preliminares del estudio indican que ambas intervenciones reducen las urgencias por síntomas asmáticos en estos niños.
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