Difference against mean plot filling cystometry.

Difference against mean plot for a) first sensation of filling, b) first desire to void, c) strong desire to void, d) maximum cystometric capacity, e) compliance, and f) maximum detrusor pressure during filling for UDI 1 vs. 2. Wide 95% limits of agreement reflect poor repeatability with unacceptable discrepancies between same session repeat UDIs. UDI = Urodynamic investigation.