CRP and hyperinsulinemic hypoglycemia, familial, 4: In a Chinese study involving more than 1400 children aged 7 to 11 years, comparing deficiency and sufficiency groups, there was an inverse association of 25(OH)D levels with hs-CRP (1.21 ± 0.13 vs.1.04 ± 0.14), interleukin-6 (IL-6) (3.83 ± 0.33 vs. 3.58 ± 0.34), MDA (2.87 ± 0.21 vs. 2.83 ± 0.27), and superoxide dismutase (SOD) (95.38 ± 12.22 vs. 127.62 ± 15.98 U/mL, p < 0.001) [43].