Table 2.

Preoperative and postoperative ABG parameters

Parameters	Met-group (n=387)	Non-Met group (n=239)	Non-Diab group (n=164)	P Met-group vs. Non-Met group	P Met-group vs. Non-Diab group	P Non-Non-Met group vs Non-Diab group
Preoperative lactate levels	1.57±0.62	1.53±0.6	1.48±0.56	0.370	0.090	0.395
Mean postoperative lactate	1.91±0.7	2.04±0.79	2.07±0.78	0.035	0.020	0.709
∆ lactate	0.34±0.87	0.52±0.82	0.59±0.87	0.011	0.003	0.443
Preoperative pH	7.43±0.03	7.44±0.03	7.44±0.04	<0.0001	0.066	0.366
Mean postoperative pH	7.40±0.03	7.40±0.03	7.40±0.03	0.195	0.124	0.734
∆ pH	−0.03±0.04	−0.04±0.04	−0.03±0.04	0.046	0.672	0.253
Preoperative HCO3 levels	25.42±2.51	25.78±2.46	25.71±2.76	0.079	0.229	0.791
Mean postoperative HCO3 levels	22.88±1.84	23.13±1.71	23.69±1.54	0.093	<0.0001	0.001
∆ HCO3	−2.54±2.99	−2.63±2.67	-2.02±3.13	0.680	0.070	0.037
Lactate acidosis n (%) (lactate >5.0, PH <7.35)	18 (4.7%)	14 (5.9%)	9 (5.5%)	0.082	0.208	0.579

Data is presented as mean±SD. ∆ = delta (postoperative - preoperative)