The primary outcome was the degree of reduction in the glucocorticoid dose ( 90 to 100 % reduction , 75 to less than 90 % reduction , 50 to less than 75 % reduction , more than 0 to less than 50 % reduction , or no decrease in oral glucocorticoid dose , a lack of asthma control during weeks 20 to 24 , or withdrawal from treatment ) .