Table 2. Characteristics of uric acid stones vs nonuric acid stones.
| Variable | Total | Uric acid | Nonuric acid | p-value |
|---|---|---|---|---|
| No. of cases | 270 | 79 | 191 | |
| Age (y) | 55.6±14.2 | 61.6±14.3 | 53.5±13.6 | <0.001 |
| Sex | <0.001 | |||
| Male | 179 | 68 | 111 | |
| Female | 91 | 11 | 80 | |
| Stone size (mm) | 8.35±5.72 | 9.03±4.51 | 8.10±6.09 | 0.262 |
| HU value (kVp) | ||||
| 80 | 943.96±516.47 | 511.47±233.43 | 1,099.27±502.05 | <0.001 |
| 140 | 646.88±294.9 | 481.98±152.52 | 706.10±311.11 | <0.001 |
| Color-coded Image | Red (100%) | Blue (96.3%) |
Values are presented as mean±standard deviation unless otherwise indicated.
HU, Hounsfield units.