Table 2.
24-Hour urine collection data of stone formers (FSF vs. RSF)
| FSF n = 77 |
RSF n = 87 |
p value | |
|---|---|---|---|
| Mean ± SD | Mean ±SD | ||
| 24-h urinary sodium | 171.6 ± 78.6 | 184.7 ± 74.1 | 0.274 |
| 24-h urinary potassium (mmol/day) | 41.5 ± 18.4 | 45.4 ± 18.9 | 0.189 |
| 24-h urinary chlorine (mmol/day) | 150.9 ± 75.4 | 162.6 ± 68.5 | 0.296 |
| 24-h urinary magnesium (g/day) | 0.07 ± 0.03 | 0.08 ± 0.03 | 0.581 |
| 24-h urinary phosphorus (g/day) | 0.71 ± 0.28 | 0.73 ± 0.29 | 0.592 |
| 24-h urinary calcium (g/day) | 0.16 ± 0.08 | 0.19 ± 0.10 | 0.129 |
| 24-h urinary creatinine (g/day) | 1.22 ± 0.51 | 1.27 ± 0.52 | 0.601 |
| 24-h urinary uric acid (g/day) | 0.57 ± 0.25 | 0.54 ± 0.23 | 0.518 |
| 24-h urinary urea nitrogen (g/day) | 7.81 ± 2.80 | 8.55 ± 3.16 | 0.118 |
| 24-h urinary oxalate (mg/day) | 29.3 ± 23.0 | 27.6 ± 16.1 | 0.587 |
| 24-h urinary urine volume (ml) | 1866 ± 768 | 1725 ± 619 | 0.198 |
| 24-h urinary pH | 6.4 ± 0.6 | 6.5 ± 0.7 | 0.324 |
| 24-h urinary SI.CaOx | 0.91 ± 0.23 | 0.92 ± 0.31 | 0.874 |
| 24-h urinary SI.CaP | 6.99 ± | 7.77 ± 4.24 | 0.216 |
FSF: first-time stone formers, RSF: recurrent stone formers, SI: supersaturation index, CaOx: calcium oxalate, CaP: calcium phosphate