Compared with placebo , unscheduled medical attendances for wheezing episodes were reduced in children given montelukast in the 5/5 stratum ( 20 [ 27 ] vs 24 [ 30 ] ; IRR 080 , 95 % CI 068-095 ; p = 001 ) , but not in those in the 5/x + x/x stratum ( 20 [ 25 ] vs 20 [ 23 ] ; 103 , 083-129 ; p = 079 , pinteraction = 008 ) .