Table 3. COM stones group (monohydrate≥90%) vs. COD stones group (monohydrate<90%).
| Variable | Total | COM group | COD group | p-value |
|---|---|---|---|---|
| No. of cases | 135 | 92 | 43 | |
| Age (y) | 52.6±12.5 | 54.4±11.9 | 49.1±13.2 | 0.026 |
| Sex | 0.849 | |||
| Male | 78 | 52 | 26 | |
| Female | 57 | 40 | 17 | |
| Laterality | ||||
| Right | 62 | 40 | 22 | 0.548 |
| Left | 63 | 43 | 20 | 0.403 |
| Both | 10 | 9 | 1 | 0.951 |
| Stone size (mm) | 6.96±4.60 | 7.04±3.47 | 6.81±6.33 | 0.796 |
| HU value (kVp) | ||||
| 80 | 1,059.07±472.10 | 1,190.20±445.23 | 793.69±413.55 | <0.001 |
| 140 | 673.05±260.44 | 753.21±239.33 | 510.82±225.43 | <0.001 |
Values are presented as mean±standard deviation unless otherwise indicated.
COM, calcium oxalate monohydrate; COD, calcium oxalate dehydrate; HU, Hounsfield units.