Predictive presurgery model for the cholecyst lithiasis in the video laparoscopy cholecystectomy.

Abstract

A prospective, analytic study was done with the objective to elaborate and evaluate according to clinic variables, a predictive model for the cholecyst lithiasis. Our study was established by 346 patients which were admitted to the hospital with a vesi cu lar surgery diagnose. They had a video laparoscopy cholecystectomy during the period comprised between November 1999 and November 2001 in ¨Faustino Perez hospital. The index of cholecyst lithiasis was 3.1%. In the analysis the most significant variables were the increased choledochal diameter which was observed in the ultrasound, alkalisch phosphatase and the presence of ikteros. None of the variables made a factor in the multi-variable analysis.
A predictive model was made for the cholecyst lithiasis.
Semantic Control:
Dummy variable: When a variable is qualitative or politomic nominal to be included among the co-variables.
Estadigrapho test: It relates types of facts and number of groups that are compare. Level of meaning or alpha: It is the limit to refuse null hypothesis (Ho). Alpha is accepted= 0.01 or 0.05, figures that imply a 1 or a 5% respectively of mistakes when Ho is rejected, to say there is a difference when in reality there is not. Exponential B: Estimate of the relative risk. Interval of confidence: It expresses the probability that it was inside the estimated limit.