TABLE 4.
Descriptive statistics on baseline ultrasonographical variables for CKD cats enrolled in this prospective imaging study, grouped according to the detection of macro‐nephrocalcinosis by ultrasonography (“Absence of nephrocalcinosis” vs “Presence of nephrocalcinosis”).
| Variables | Absence of nephrocalcinosis (n = 14) | Presence of nephrocalcinosis (n = 22) | P‐value | ||
|---|---|---|---|---|---|
| Median [25th, 75th percentile] | n | Median [25th, 75th percentile] | n | ||
| Renal shape (left kidney) | Normal, 9; Irregular, 5 | 14 | Normal, 14; Irregular, 8 | 22 | .97 |
| Renal shape (right kidney) | Normal, 10; Irregular, 4 | 14 | Normal, 13; Irregular, 9 | 22 | .5 |
| Renal length (left kidney, cm) | 3.1 [2.6, 3.4] | 14 | 3.1 [2.9, 3.4] | 21 | .27 |
| Renal length (right kidney, cm) | 3.2 [2.9, 3.5] | 14 | 3.1 [2.6, 3.5] | 21 | .44 |
| Corticomedullary differentiation (left kidney) | Maintained, 2; Poorly maintained, 9; Loss, 3 | 14 | Maintained, 1; Poorly maintained, 8; Loss, 13 | 22 | .08 |
| Corticomedullary differentiation (right kidney) | Maintained, 0; Poorly maintained, 12; Loss, 2 | 14 | Maintained, 2; Poorly maintained, 9; Loss, 11 | 22 | .02 |
| Cortical thickness (left kidney, cm) | 0.34 [0.30, 0.45] | 14 | 0.40 [0.38, 0.47] | 21 | .27 |
| Cortical thickness (right kidney, cm) | 0.37 [0.35, 0.45] | 14 | 0.33 [0.29, 0.42] | 18 | .17 |
| Medullary rim sign (left kidney) | Present, 2; Absent, 12 | 14 | Present, 4; Absent, 17 | 21 | 1 |
| Medullary rim sign (right kidney) | Present, 2; Absent, 12 | 14 | Present, 3; Absent, 18 | 21 | 1 |
| Nephrolithiasis (left kidney) | Present, 0; Absent, 14 | 14 | Present, 4; Absent, 17 | 21 | .13 |
| Nephrolithiasis (right kidney) | Present, 0; Absent, 14 | 14 | Present, 1; Absent, 20 | 21 | 1 |
| Other parenchymal abnormality (left kidney) | Cortical scars, 2; Cortical cysts, 2; None, 10 | 14 | Cortical scars, 1; Cortical cysts, 8; None, 12 | 21 | .24 |
| Other parenchymal abnormality (right kidney) | Cortical scars, 2; Cortical cysts, 0; None, 12 | 14 | Cortical scars, 1; Cortical cysts, 4; None, 16 | 21 | .2 |
| Perirenal abnormality (left kidney) | None, 14 | 14 | None, 21 | 21 | 1 |
| Perirenal abnormality (right kidney) | None, 14 | 14 | None, 21 | 21 | 1 |
Note: Significant difference between groups (P ≤ .05) are highlighted in bold.
Abbreviation: n, number of cats.