tokens: Compared with the sufficient group ( n=18 ) , the deficient group ( n=11 ) received higher daily mean vitamin D doses ( 2246 vs 920 IU ; P=.02 ) , had shorter remnant small - bowel length ( 53.8 vs 82.1 cm ; P=.03 ) , and were PN dependent for a longer duration ( 1.3 vs 0.58 years ; P=.01 ) .