Among unobstructed patients the concordance between the 2 nomograms was 97.4%. There was a complete concordance of un-obstruction only in Sn class 0, while in class I the concordance reached 70%. Among patients with equivocal diagnosis at ICSn, the Sn class II was the most usual (67.2%). Among patients clearly obstructed at ICSn, there was a complete concordance between the 2 nomograms. Moreover, 74.4% of the patients were in Sn classes III–IV, and 22.4% in classes V–VI. Table 1 resumes data regarding BOO. We found a high correspondence in patients with normal detrusor contractility between the two nomograms (96.7%). In case of DU at BCI we found that 96.2% of males were in classes W/VW of Sn. Among males with normal detrusor contractility at Sn, 11% had a diagnosis of DU at BCI. Table 2 reports data on DU. We found a high concordance between Schaefer and ICS nomograms. Only Sn class 0 was completely associated to diagnosis of un-obstruction at ICSn. Equivocal diagnosis at ICSn corresponded in most of cases at Sn class II. When ICSn documented obstruction, Sn reached a complete correspondence. Correspondence between Sn and BCI was high (96%), but a relevant number of patients with Sn normal contractility class had a diagnosis of DU at BCI (11%). Data showed a high correspondence between Sn and ICSn, and most of the equivocal diagnosis at ICSn corresponded to Sn low obstruction (Class II). Correspondence between Sn and BCI was high but surprisingly with a misleading diagnosis in 1/10 patient. This study evidences how in the clinical practice to achieve a more precise diagnosis of bladder underactivity and/or bladder outlet obstruction it is useful to use all the nomograms.
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