Variable | Group | N | Mean | SD | Median | Minimum | Maximum | p Value |
---|---|---|---|---|---|---|---|---|
Age | AKI | 4 | 61.00 | 13.19 | 60.50 | 46.00 | 77.00 | 0.2745 |
No AKI | 80 | 67.63 | 14.19 | 71.00 | 28.00 | 96.00 | ||
Pre-study BUN | AKI | 4 | 21.00 | 9.02 | 21.00 | 10.00 | 32.00 | 0.4001 |
No AKI | 80 | 17.14 | 7.31 | 16.50 | 1.00 | 38.00 | ||
Pre-study Cr | AKI | 4 | 1.35 | 0.31 | 1.30 | 1.09 | 1.72 | 0.0459 |
No AKI | 80 | 1.03 | 0.34 | 0.95 | 0.54 | 2.18 | ||
Pre-study BUN:Cr | AKI | 4 | 15.18 | 4.36 | 16.47 | 9.17 | 18.60 | 0.4816 |
No AKI | 80 | 16.81 | 5.27 | 16.79 | 0.82 | 28.57 | ||
Peak BUN | AKI | 4 | 53.75 | 26.58 | 46.00 | 31.00 | 92.00 | 0.0012 |
No AKI | 80 | 15.70 | 7.44 | 14.00 | 6.00 | 44.00 | ||
Peak Cr | AKI | 4 | 3.00 | 2.22 | 1.98 | 1.72 | 6.31 | 0.0009 |
No AKI | 80 | 0.94 | 0.28 | 0.88 | 0.53 | 1.80 | ||
Peak-BUN:Cr | AKI | 4 | 19.85 | 4.46 | 20.05 | 14.58 | 24.71 | 0.1755 |
No AKI | 80 | 16.93 | 6.37 | 15.51 | 6.93 | 44.44 | ||
Δ Cr | AKI | 4 | 1.65 | 1.96 | 0.69 | 0.62 | 4.59 | 0.0008 |
No AKI | 80 | −0.09 | 0.18 | −0.09 | −0.73 | 0.47 | ||
DSA contrast (mL) | AKI | 4 | 173.75 | 62.63 | 162.50 | 120.00 | 250.00 | 0.6059 |
No AKI | 80 | 159.44 | 63.88 | 150.00 | 50.00 | 325.00 | ||
CTSS contrast (mL) | AKI | 4 | 130.00 | 0.00 | 130.00 | 130.00 | 130.00 | 0.7807 |
No AKI | 80 | 128.75 | 7.86 | 130.00 | 80.00 | 130.00 |
*Descriptive statistics for continuous variables are shown. The Wilcoxon–Mann–Whitney test was used to test the difference between the two groups. This test is a non-parametric analog to the independent two-sample t test and can be used when the dependent variables are not normally distributed.
p Values <0.05 (significant) are indicated in bold type.
AKI, acute kidney injury; BUN, blood urea nitrogen; CR, creatinine; CTSS, CT stroke study; DSA, digital subtraction angiography.