wilder and his colleagues are cautious about their outcome first because the data do not make known whether it was the intravenous that contributed to the children ' s reading deficits , or instead it was an underlying characteristic that possibly have required procedure and precipitated the learning difficulties . of the more than 5 , 000 babies studied , 593 needed at only one surgery and just over 100 they needed more than two before adult 3 . there may be something unusual about this subset of children that could have made them vulnerable to those problems and required they require surgery and anesthesia .
Anesthesia causes learning disabilities.