(bladder outlet obstruction index, BOOI) a mathematical index used to estimate the degree of bladder outlet obstruction (*BOO). It categorizes patients as being obstructed, unobstructed, or equivocal.
(NNT) the average number of patients who need to be treated to prevent one additional negative outcome. This is the reciprocal of the absolute risk reduction: the difference between the risk of an adverse event in control and intervention groups.... number needed to treat
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