Contingency table and Fisher exact test for categorical variables*
| Variable | AKI (n=4) | No AKI (n=80) | p Value |
|---|---|---|---|
| Sex | |||
| Female | 2 (50) | 38 (47.5) | 1.0000 |
| Male | 2 (50) | 42 (52.5) | |
| Contrast type | |||
| Omnipaque | 2 (50) | 43 (53.75) | 1.0000 |
| Visipaque | 2 (50) | 37 (46.25) | |
| Interventional DSA | |||
| Diagnostic | 1 (25) | 36 (45) | 0.6269 |
| Non-diagnostic | 3 (75) | 44 (55) | |
*Frequency and percentages (counts in the cell divided by counts in that column).
p Values from Fisher exact test are listed (the Fisher exact test is used when the χ2 test is needed but one or more of the cells has an expected frequency of <5).AKI, acute kidney injury; DSA, digital subtraction angiography.