Table 6. Association of AKI stages with BUN and SCr levels.
| Stage | ||||
| Stage I | Stage II | Stage III | P value* | |
| First abnormality | ||||
| BUN (mmol/l) | 11.1 (8.1–15.5) | 15.2 (10.9–22.5) | 24.8 (16.9–33.8) | <0.0001 |
| SCr (µmol/l) | 148.1 (132.0–178.0) | 260.2 (237.1–305.1) | 536.3 (381.1–804.0) | <0.0001 |
| Peak | ||||
| BUN (mmol/l) | 23.9 (14.6–34.1) | 24.2 (15.4–33.4) | 31.0 (22.8–40.6) | <0.0001 |
| SCr (µmol/l) | 290.0 (203.6–399.9) | 392.6 (267.5–543.2) | 670.7 (488.7–917.8) | <0.0001 |
| Discharge | ||||
| BUN (mmol/l) | 12.5 (7.3–29.0) | 18.5 (7.6–26.8) | 15.8 (8.4–25.9) | 0.65 |
| SCr (µmol/l) | 185.0 (101.0–323.0) | 244.6 (106.0–440.1) | 299.0 (135.1–540.0) | 0.001 |
These biological parameters were measured using an automatic biochemistry analyzer (Hitachi 76000, Japan).
*P for trend among AKI stage I to III.
BUN at first abnormality: H = 71.42 (rank sum test); BUN at peak: H = 19.19 (rank sum test); BUN at discharge: H = 0.85 (rank sum test); SCr at first abnormality: H = 169.62 (rank sum test); SCr at peak: H = 114.82 (rank sum test); SCr at discharge: H = 14.41, (rank sum test).