Table 2 Laboratory data and incidence of CI-AKI (n (%) or median [IQR]) (n = 284)
|  | metformin n = 119 | No Metformin n = 165 | p value |
|---|---|---|---|
HbA1c(%) | 7.0 [3.6–14.2] | 7.8 [6.9–8.8] | 0.194 |
Hb(g/l) | 141 [126–152] | 120 [110–140] | 0.079 |
cTnI peak (ng/ml) | 7.0 [3.6–14.2] | 7.8 [6.9–8.8] | 0.842 |
Creatinine | |||
 Baseline (μmol/l) | 76 [66–86] | 73 [61–84] | 0.105 |
 Post PCI (μmol/l) | 83 [72–98] | 76 [64–76] | 0.012 |
 Relative creatinine change | 11% [6–20%] | 11% [5–22%] | 0.858 |
post PCI (%) | |||
  ≥ 50% increase | 5 (4.2%) | 9 (5.5%) | 0.630 |
 Absolute creatinine change | 7.9 [2.4–13.2] | 6.7 [0.2–12.7] | 0.198 |
post PCI (%) (μmol/l) | |||
  ≥ 27 μmol/l(0.3 mg/dl) | 15 (12.6%) | 15 (9.1%) | 0.342 |
eGFR (ml/min/1.73m2) | |||
 Baseline (ml/min/1.73m2) | 89 [73–104] | 94 [72–113] | 0.170 |
 eGFR≤60 ml/min/1.73m2 | 9 (7.6%) | 21 (12.7%) | 0.163 |
 Post PCI (ml/min/1.73m2) | 77 [65–95] | 87 [67–102] | 0.092 |
 Relative eGFR change | 13.4% [6.4–25.1%] | 13.5% [5.2–24.3%] | 0.449 |
post PCI (%) | |||
 Absolute eGFR change | −7 [−16; 3] | −6 [−18; 3] | 0.981 |
post PCI (ml/min/1.73m2) | |||
 CI-AKI | 15 (12.6%) | 17 (10.3%) | 0.545 |