Serum levels of fat-soluble vitamins in children with attention deficit hyperactivity disorder and relationship with symptom subtypes.

Results of independent samples t-tests showed t-values of -7.692, -3.563, -8.886, -7.249, and -3.651, respectively, with all P < 0.001, indicating extremely significant differences. 3.3 Comparison of vitamins between different ADHD types and the control group Table 3 compares the vitamin contents of different ADHD subtypes (inattentive type, hyperactive-impulsive type, combined type) with those of the control group: In terms of VD3, the contents in all ADHD subtypes were significantly lower than those in the control group ( P < 0.001 for the inattentive and combined types, and P = 0.002 for the hyperactive-impulsive type).

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