For these athletes , the number of coughs after exercise ( mean number of coughs standard deviation : placebo , 26 14 ; ipratropium , 25 23 ; P value , nonsignificant ) and the maximal perception score for cough intensity ( mean Borg score standard deviation : placebo , 1.9 1.2 ; ipratropium , 2.0 1.1 ; P value , nonsignificant ) were not significantly different between ipratropium and placebo .