Percentage change between intervention 2 and education time period for the outcomes of interest (all visits included). A, Prescription for controller medication; B, spirometry performed; C, ACP. The education time period was October 13, 2006, to April 15, 2007, and the intervention 2 time period was October 16, 2007, to April 15, 2008. Site-specific changes in percentages of children were documented as having received the above-listed outcomes. P values reflect the difference between all control and intervention sites according to the t test. S indicates SP; U, UP.