Table 1.
Stone Mineral Content | Both Negative | Positive Urine Culture | Positive Stone Culture | Both Urine and Stone Culture Positive |
---|---|---|---|---|
Struvite | 6 (9.4) | 11 (17.2) | 7 (10.9) | 40 (62.5) |
Apatite | 21 (16.9) | 22 (17.7) | 19 (15.3) | 62 (50) |
Other | 37 (20.6) | 46 (25.6) | 30 (16.7)* | 67 (37.2)* |
Total | 64 (17.4) | 79 (24.5) | 56 (15.2) | 169 (45.9) |
PCNL: percutaneous nephrolithotomy. Struvite includes any patient with any struvite reported in the stone analysis, regardless of the percentage. Apatite includes patients with no struvite and >50% apatite (either reported as hydroxyapatite or carbonate apatite). Other is all non-struvite, non-apatite patients.
Fraction of stone cultures that were positive (summing all positive stone culture results, ignoring urine culture results) was significantly less than for Struvite and Apatite groups, p<0.05.