Table 2.
Voiding characteristics of participants with and without NP
| Bladder diary measures | With NP (n=186) | Without NP (n=98) | p-value |
|---|---|---|---|
| Nocturia (sd) | 2.4 (1.3) | 1.4 (1.2) | <.01 |
| FBC, ml (sd) | 522 (185) | 484 (197) | .09 |
| NBC, ml (sd) | 515 (187) | 454 (192) | <.01 |
| 24 hour voided volume, ml(sd) | 1879 (699) | 1880 (727) | .90 |
| Mean volume/void while awake, ml (sd) | 188 (71) | 212 (85) | .01 |
| Mean volume/void while asleep, ml (sd) | 327 (170) | 152 (162) | <.01 |
| DUV, ml (sd) | 1058 (436) | 1400 (554) | <.01 |
| NUV, ml (sd) | 838 (318) | 488 (210) | <.01 |
| NPi, % (sd) | 45.7 (7.9) | 26 (5.2) | <.01 |
| CES-D score (sd) | 5.71 (5.2) | 6.03 (3.6) | 0.75 |
| Time in bed, min (sd) | 532 (71) | 470 (69) | .01 |
| Duration of uninterrupted sleep, min (sd) | 221 (82) | 293 (89) | <.01 |
Note: FBC= functional bladder capacity, NBC= nocturnal bladder capacity, DUV= diurnal urine volume, NUV= nocturnal urine volume, NPi= nocturnal polyuria index (NUV/24 hour volume *100), CES-D= Center for Epidemiologic Studies Depression Scale, SD= standard deviation. Nocturia: number of voids (averaged over 3 days) during the period between the time the participant noted going to bed for the night and arising for the day.