Table 4.

Level of oxidative stress markers in students.

Antioxidant	School A	School B	School C	School D	All schools
	n=21	n=23	n=16	n=15	n=75
SOD (Uml)
Mean ± SD	84.31±23.11	76.81±47.39	139.82±71.32*	96.86±31.17*	96.36±50.94
Median	83.86#	62.27#	129.21	101.88	84.97#
CI 95%	73.79-94.83	56.32-97.31	101.82-177.82	79.59-114.13	48.64-108.08
Min-Max	45.58-124.09	39.62-262.44	39.62-273.45	43.01-133.78	39.62-273.45
GSH (μg/ml)
Mean ± SD	0.52±0.08*	0.61±0.05*	0.66±0.0.06*	0.72±0.05*	0.62±0.09*
Median	0.51	0.61	0.66	0.72	0.63
CI 95%	0.48-0.56	0.59-0.63	0.63-0.70	0.69-0.74	0.60-0.64
Min-Max	0.33-0.68	0.51-0.73	0.57-0.83	0.51-0.73	0.33-0.83

^*Normal distribution

^#skewed distribution.