| Variables | NSAIDs users | Controls | X2 | P-value |
| Kidney sizes | Frequency (%) | Frequency (%) |
|
|
|
| n = 100 | n = 100 |
|
|
| Length |
|
|
|
|
| (≥9 cm) (<9 cm) | 75 25 | 79 21 | 0.45
| 0.3
|
| Cortical thickness |
|
|
|
|
| (≥7 mm) (<7 mm) | 78 (78) 22 (22) | 93 (93) 7 (7) | 9.07
| 0.01
|
| Echo grade |
|
|
|
|
| (0) (≥1) | 71 (71) 29 (29) | 91 (91) 9 (9) | 12.99
| <0.001
|
| Volume |
|
|
|
|
| (≥50 cm3) (<50 cm3) | 75 (75) 25 (25) | 92 (92) 8 (8) | 12.48
| <0.001
|