Figure 1. Accuracy of supersaturation at different cut-off values of predominant stone composition.
| World Journal of Nephrology and Urology, ISSN 1927-1239 print, 1927-1247 online, Open Access |
| Article copyright, the authors; Journal compilation copyright, World J Nephrol Urol and Elmer Press Inc |
| Journal website http://www.wjnu.org |
Original Article
Volume 4, Number 1, March 2015, pages 169-172
Does 24-Hour Urine Supersaturation Predict Stone Composition?
Figure
Tables
| Demographics | CAOX | CAPH | UA | Mixed | P value |
|---|---|---|---|---|---|
| *Stone group: ≥ 60% of the predominant mineral. | |||||
| No. of patients (%) | 235 (61%) | 98 (25%) | 35 (9%) | 18 (5%) | 386 |
| Gender | < 0.0001 | ||||
| Male | 151 (64%) | 31 (32%) | 24 (69%) | 10 (56%) | |
| Female | 84 (36%) | 67 (68%) | 11 (31%) | 8 (44%) | 386 |
| Mean age | 56 ± 15 | 54 ± 17 | 60 ± 10 | 50 ± 14 | 0.390 |
| BMI | 29 ± 7.5 | 29.3 ± 9.3 | 31.2 ± 6.4 | 30.5 ± 7.4 | 0.3781 |
| pH | 5.9 ± 0.4 | 6.4 ± 0.6 | 5.8 ± 0.6 | 6.4 ± 0.6 | < 0.0001 |
| Urine volume | 2 ± 0.9 | 2.1 ± 1 | 1.9 ± 0.8 | 1.9 ± 1 | 0.6195 |
| CAOX SS | 6.74 ± 3.6 | 6.6 ± 3.7 | 5.9 ± 3.7 | 5.6 ± 3.2 | 0.3202 |
| CAPH SS | 1 ± 0.96 | 1.6 ± 1.2 | 0.7 ± 1.1 | 1.5 ± 1.2 | < 0.0001 |
| UA SS | 1 ± 0.87 | 0.46 ± 0.5 | 1.4 ± 1 | 0.5 ± 0.87 | < 0.0001 |
| Mineral stone conc.* (%) | Calcium oxalate (sensitivity/specificity/accuracy) | Calcium phosphate (sensitivity/specificity/accuracy) | Uric acid (sensitivity/specificity/ accuracy) |
|---|---|---|---|
| *Conc.: concentration. | |||
| > 60% | 54%/51%/52.5% | 32%/83%/70% | 60%/67.5%/67% |
| > 70% | 55%/50%/54% | 32%/82.5%/72% | 60%/67.5%/67% |
| > 80% | 55%/52%/54% | 38%/83%/76% | 60%/67%/67% |
| > 90% | 51%/48%/49% | 40%/82%/77% | 60%/67%/67% |