Table 2: Hematological measurements, homocysteine, vitamin B-6 status, indicators of oxidative stress, and antioxidant capacities in critically ill patients on the 1st and 7th days of admission to the surgical intensive care unit1.

VariablesDay 1 Day 7 (Day 7 − Day 1)2
( )( )( )

Albumin (g/L)2.81 0.142.76 0.07−0.05 0.14
Hemoglobin (g/dL)10.31 0.36a9.32 0.32b−0.99 0.31
Creatinine (mg/dL)1.90 0.332.07 0.390.11 0.20
C-reactive protein (mg/dL)10.54 1.289.19 1.15−1.54 1.43
Vitamin B-6 status
 Plasma PLP (nmol/L)30.64 4.7337.11 4.926.47 10.99
 <20 nmol/L ( , %)16 (43.24%)12 (32.43%)
 Erythrocyte PLP (pmol/g Hb)444.99 104.88a669.55 156.62b224.56 92.76
 Plasma PLP/Erythrocyte PLP ratio0.11 0.020.10 0.01−0.00 3.37
Oxidative stress
 Plasma homocysteine ( mol/L)18.38 2.73a19.99 2.70b1.61 3.37
 >15  mol/L ( , %)15 (40.54%)a22 (59.46%)b
 MDA ( mol/L)1.00 0.081.02 0.090.02 0.06
Antioxidant capacity
 Total antioxidant capacity ( mol/L)4042.28 82.65a4243.33 84.62b201.05 66.63
 SOD (U/mL)10.60 1.2111.01 1.310.41 1.70
 GST (nmol/min/mL)4.37 0.62a8.99 0.56b1.75 4.29
 GPx (nmol/min/mL)100.33 5.5298.92 5.73−1.41 5.64

Values are means standard error of mean. PLP: pyridoxal-5′-phosphate; Hb: hemoglobin; MDA: malondialdehyde; SOD: superoxide dismutase; GST: glutathione S-transferase; GPx: glutathione peroxidase.
2 (Day 7 − Day 1) is the value of the difference between day 7 and day 1.
a,bValues are significantly different between day 1 and day 7; .