[Table/Fig-6]:

Comparison between mean plasma levels of oxidant and antioxidants among the patient group according to the radiological grading of RDS.

Variables	Radiological findings			p-value
	Grade I (n=16)	Grade II (n=11)	Grade III/ IV (n=10)
	Mean ± SD	Mean ± SD	Mean ± SD
Protein carbonyl (nmol/l)	1.05 ± 0.37	0.98 ± 0.28	0.83 ± 0.41	0.21
Superoxide dismutase activity (U/gm Hb)	12.77 ± 3.05	13.38 ± 2.69	12.64 ± 2.79	0.85
Glutathione peroxidase activity (mU/mL)	72.99 ± 20.04	78.98 ± 19.82	73.57 ± 21.45	0.64
Oxidant/ anti-oxidant ratio	0.0136 ± 0.0068	0.0114 ± 0.0047	0.0108 ± 0.0079	0.44
Copper (μmol/l)	4.09 ± 1.68	4.21 ± 1.79	3.92 ± 1.72	0.96
Zinc (μmol/l)	3.18 ± 1.11	3.59 ± 0.67	3.43 ± 1.44	0.599
Selenium (ng/ml)	46.88 ± 5.16	48.09 ± 5.59	48.40 ± 7.24	0.83

*p-value <0.05 is considered statistically significant.