Table 3. Minimal, medium and maximal values of laboratorial tests results in the immediate postoperative.

Variables	Minimal	p value*	Maximal	p value*	Mean	p value*
Magnesium, mEq/L
With POAF	1.5 (0.2)	0.079	1.9 (0.3)	0.170	1.7 (0.2)	0.051
Without POAF	1.5 (0.3)		1.8 (0.3)		1.8 (0.3)
Sodium, mEq/L
With POAF	135.6 (3.3)	0.931	138.7 (3.2)	0.343	137.1 (3.0)	0.483
Without POAF	132.7 (19.8)		139.3 (3.5)		136.8 (5.8)
Potassium, mEq/L
With POAF	3.8 (0.4)	0.783	4.5 (0.4)	0.563	4.1 (0.3)	0.903
Without POAF	3.8 (0.4)		4.5 (0.6)		4.1 (0.5)
Ionized calcium, mg/dL
With POAF	1.12 (0.03)	0.018	1.21 (0.08)	0.467	1.16 (0.04)	0.245
Without POAF	1.14 (0.05)		1.22 (0.08)		1.18 (0.06)
CRP, mg/dL
With POAF	57.8 (73.9)	0.451	65.0 (71.9)	0.761	64.1 (73.0)	0.680
Without POAF	39.7 (31.0)		54.8 (32.1)		47.0 (26.9)
Creatinine, mg/dL
With POAF	2.5 (3.0)	0.074	2.2 (2.7)	0.161	2.2 (2.7)	0.129
Without POAF	1.7 (2.2)		2.3 (4.9)		2.0 (3.1)
Urea, mg/dL
With POAF	45.6 (38.5)	0.699	46.1 (38.4)	0.537	45.8 (38.5)	0.613
Without POAF	46.4 (28.5)		47.8 (29.8)		47.1 (29.1)

*Mann-Whitney test. Results presented in means (standard deviation).

POAF: postoperative atrial fibrillation; CRP: C-reactive protein.