Table 3.
Day and night urine volume, flow rate and composition for Study 2 (mean ± SD)
| Parameter | Black n=11 | White n=17 | p (BvW) |
|---|---|---|---|
| Day | |||
| Volume (mL) | 934 ± 751 | 1070 ± 403 | 0.59 |
| Flow rate (mL/min) | 1.18 ± 0.95 | 1.38 ± 0.48 | 0.55 |
| Na excretion (mmoles) | 83.4 ± 59.8 | 101.0 ± 57.3 | 0.45 |
| K excretion (mmoles) | 26.1 ± 16.7 | 45.6 ± 20.9 | 0.01 |
| UOsm (mOsm/L) | 583 ± 243 | 477 ± 204 | 0.25 |
| Osmolar excretion (mosmoles) | 460.4 ± 317.3 | 494.2 ± 246.7 | 0.77 |
| Concentration index | 129.0 ± 86.9 | 91.2 ± 37.9 | 0.20 |
| Night | |||
| Volume (mL) | 455 ± 212 | 478 ± 207 | 0.78 |
| Flow rate (mL/min) | 0.94 ± 0.48 | 0.93 ± 0.36 | 0.94 |
| Na excretion (mmoles) | 43.3 ± 32.4 | 55.2 ± 31.7 | 0.35 |
| K excretion (mmoles) | 13.5 ± 12.0 | 13.6 ± 9.6 | 0.99 |
| UOsm (mOsm/L) | 610 ± 218 | 556 ± 226 | 0.54 |
| Osmolar excretion (mosmoles) | 247.0 ± 108.9 | 251.7 ± 107.4 | 0.91 |
| Concentration index | 167.8 ± 102.2 | 131.5 ± 68.7 | 0.32 |