Table 3.
Urodynamic parameters in women with and without nocturia
| All Patients N=358 | No Nocturia (0–1 void per night) N=186 | Nocturia (≥ 2 voids per night) N=172 | P-value | |
|---|---|---|---|---|
| Uroflowmetry (n = 268) | ||||
| Voided volume (mL), median (IQR) | 136 (66,262) | 139 (69,281) | 123 (58,229) | 0.4 |
| PVR (mL), median (IQR) | 20 (10,50) | 20 (10,50) | 20 (10,50) | 0.6 |
| Qmax (mL/s), median (IQR) | 16 (10,26) | 17 (11,27) | 15 (8,23) | < 0.05 |
| Qavg (mL/s), median (IQR) | 6 (4,10) | 7 (4,12) | 6 (3,10) | < 0.05 |
| BVE, Median (IQR) (%) | 86 (77,94) | 88 (76,95) | 86 (78,94) | 0.4 |
| Filling Cystometry (mL) (n = 358) | ||||
| First sensation, median (IQR) | 112 (76,160) | 114 (79,160) | 108 (75,160) | 0.5 |
| First desire, median (IQR) | 144 (101,209) | 149 (104,225) | 136 (100,194) | 0.1 |
| Strong urge, median (IQR) | 180 (127,264) | 187 (131,290) | 169 (122,246) | 0.1 |
| Maximum cystometric capacity, median (IQR) | 238 (160,352) | 245 (170,377) | 228 (142,323) | < 0.05 |
| Pressure Flow Studies (n = 274) | ||||
| Void < 100 mL, n (%) | 84 (23%) | 32 (27%) | 52 (30%) | < 0.01 |
| Qmax (mL/s), median (IQR) | 16 (12,21) | 16 (12,21) | 15 (11,21) | 0.3 |
| Qavg (mL/s), median (IQR) | 6 (4,8) | 6 (5,8) | 6 (4,8) | 0.9 |
| PdetQmax (cm H2O), median (IQR) | 26 (18,39) | 26 (17,38) | 25 (18,41) | 0.6 |
| Peak Pdet (cm H2O), median (IQR) | 46 (32,63) | 47 (32,65) | 45 (32,60) | 0.6 |
BVE: Bladder Voiding Efficiency = (voided volume/voided volume + residual volume) × 100
PVR: Post void residual volume, Pdet: Detrusor pressure; Qmax: Maximum flow rate, Qavg: Average flow rate, PdetQmax: Detrusor pressure at maximum flow
IQR: Interquartile range