More PRE children required hospital stay after surgery ( 81 % vs 72 % , P = 0.004 ) , and PRE children had a longer number of days hospitalized after surgery ( median [ interquartile ranges ] : 1 [ 1-3 .5 ] vs 1 [ 0-2 ] ; P < 0.001 ) and incurred higher excess costs ( P < 0.001 ) but not indirect costs ( P = 0.23 ) .