Table 4 Logistic regression predictors for peri-operative lactic acidosis

Age >70

OR: 1.53; 95%CI 0.75–3.12, P = 0.237

OR: 2.12; 95%CI 0.93–4.83, P = 0.073

Elevated serum creatinine >50%

OR: 1.01; 95%CI 0.19–5.2, P = 0.984

OR: 1.69; 95%CI 0.23–12.30, P = 0.601

Peri-operative metformin

OR: 0.45; 95%CI 0.21–0.98, P = 0.045

OR: 1.78; 95%CI 0.77–4.09, P = 0.174

Cardiac low out-put state

OR: 2.16; 95%CI 0.91–5.15, P = 0.082

OR: 1.74; 95%CI 0.49–6.17, P = 0.393

Vassopressor support

OR: 7.26; 95%CI 2.55–20.65, P < 0.0001

OR: 11.77; 95%CI 2.86–48.37, P < 0.001