Table 1. Previously proposed urodynamic criteria for diagnosing detrusor underactivity in the literature.

Study	Target population	Diagnostic criteria	Byname in the present study
Abrams (1999) [4]	Male	BCI <100	BCI criteria
Nitti et al. (2002) [5]	Male	AG number<20 and free uroflow Qmax<12 mL/s	AG number criteria
Abarbanel and Marcus (2007) [6]	Male	PdetQmax<30 cmH2O and PFS Qmax<10 mL/s	PdetQmax 30 criteria
Gammie et al. (2016) [8]	Male	BCI<100 and AG number<20 and BVE%<90	BVE criteria
Groutz et al. (1999) [7]	Female	Qmax<12 mL/s with ≥100 mL voided or PVR volume>150 mL on 2 or more free flow readings	Qmax/PVR criteria
Abarbanel and Marcus (2007) [6]	Female	PdetQmax<30 cmH2O and PFS Qmax<10 mL/s	PdetQmax 30 criteria
Gammie et al. (2016) [8]	Female	PdetQmax<20 cmH2O and PFS Qmax<15 mL/s and BVE%<90 and absence of clinical obstruction	BVE criteria

BCI, bladder contractility index; AG number, Abrams-Griffith number; Qmax, maximum flow rate; PdetQmax, detrusor pressure at maximal flow rate; PFS, pressure-flow study; BVE, bladder voiding efficiency; PVR, postvoid residual.