Fig. 1.

Comparison of serum d-ROMs levels [the reactive oxygen metabolite (ROM) test] and biological antioxidant potential (BAP) levels in males and females. a There were significant differences in serum d-ROM levels by gender in the third grade (P < 0.01). In males, ROM levels were higher in the first grade than in the other grades. b Serum BAP levels in 1st and 2nd grade were significantly higher in male students than in female students (P < 0.001); these levels were also significantly higher in male students from 3rd grade (P < 0.01). Male and female BAP levels were higher in the first grade than in the other grades