Because none of the surgery subcategories “liver,” “kidney,” or “pancreas” had proven significant risk factors, and because the effects of these variables did not significantly differ from one another ( P = 0.81), regression coefficients were recalculated after combining these factors with “spleen” and “adrenal gland” in the category “other.” For the subcategory “gallbladder and bile duct” a strong trend toward significance was found and led to the inclusion of this factor in the risk model.
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Abdominal wound dehiscence in adults: development and validation of a risk model.
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The sentences
It has been reported though, to be a highly significant factor in other studies [ 4 – 6 , 9 , 11 , 13 , 16 ].