| Characteristic | r* | p-value |
---|---|---|---|
Study-related | Publication date (months after first) | 0.36 | 0.1 |
 | Study size (number of patients) | 0.14 | 0.54 |
 | Jadad score (1–5) | 0.07 | 0.75 |
 | Total NAC dose (mg) | -0.26 | 0.25 |
Patient-related | Age (years) | -0.13 | 0.56 |
 | Baseline Creatinine (mg/dl) | -0.01 | 0.96 |
 | Diabetes mellitus (%) | -0.23 | 0.31 |
 | Female (%) | 0.1 | 0.72 |
 | Contrast volume (ml) | -0.27 | 0.24 |
 | CIN event rate in control group (%) | 0.21 | 0.35 |