Table 3.
Summary of Pooled Bladder Function Measurements with Normative Reference Values
| Studies (N) |
Total Sample |
Mean Range of Individual Studies |
Overall Estimate (95% CI) |
I2 % |
90% Normative Reference Value1 |
|
|---|---|---|---|---|---|---|
| Urination Frequencies2 | ||||||
| Daytime frequency | 5 | 869 | 5.6-7.2 | 6.6 (6.2, 7.0) | 85.9 | 4-10 |
| Nighttime frequency | 5 | 869 | 0.1-1.0 | 0.4 (0.0, 0.8) | 99.0 | 0-2 |
| 24-hour frequency | 7 | 1406 | 5.8-8.3 | 7.0 (6.3, 7.7) | 97.5 | 4-12 |
| Voided and Postvoid Residual Volumes3 | ||||||
| Total daytime voided volume | 4 | 854 | 273-1261 | 945 (289, 1601) | 99.6 | 136-1718 |
| Mean daytime voided volume | 4 | 140 | 207-289 | 230 (203,258) | 61.1 | 108-418 |
| Total nighttime voided volume | 4 | 854 | 347-468 | 401 (343, 459) | 91.5 | 152-743 |
| Mean nighttime voided volume | 5 | 259 | 155-450 | 317 (225, 408) | 97.1 | 44-588 |
| 24-hour voided volume | 7 | 1424 | 1256-1759 | 1577 (1428, 1725) | 94.0 | 761-3042 |
| Mean voided volume | 7 | 838 | 216-294 | 245 (226, 265) | 85.7 | 116-428 |
| Maximum voided volume | 5 | 767 | 362-514 | 425 (363, 487) | 95.6 | 184-761 |
| Minimum voided volume | 2 | 280 | 81-193 | 137 (27, 246) | 98.9 | 34-325 |
| Postvoid residual volume | 4 | 503 | 1-20 | 12 (4, 20) | 99.9 | 1-56 |
| Uroflowmetry Parameters3,4,5 | ||||||
| Maximum flow rate (Qmax) | 11 | 1169 | 20-49 | 29 (26, 32) | 97.9 | 12-44 |
| Mean flow rate (Qave) | 9 | 860 | 9-24 | 15 (12, 18) | 99.3 | 6-26 |
| Time to maximum flow (TQMax) | 5 | 399 | 7-15 | 10 (8, 12) | 90.4 | 3-20 |
| Flow time (Tvv) | 7 | 517 | 24-38 | 28 (23, 33) | 94.6 | 13-64 |
| Voided volume (VV) | 11 | 1067 | 224-409 | 324 (299, 350) | 99.2 | 121-638 |
1
Reference values rounded to whole numbers
2
Frequency counts rounded to tenths
3
Volumes reported in milliliters
4
Flow rates in milliliters per seconds
5
Flow time in seconds