Table 4 Associations between biochemical markers and ADHD.

From: Attention deficit–hyperactivity disorder is associated with allergic symptoms and low levels of hemoglobin and serotonin

Biochemical marker at risk

Control (N = 216)

ADHD (N = 216)

Logistic regression model

n (%)

n (%)

OR (95% CI)

p-value

Hb (<12.6 g/dL)

49 (22.7)

69 (31.9)

1.60 (1.04–2.45)

0.031

Eosinophil (>5.85%)

41 (19)

67 (31)

1.92 (1.23–3.00)

0.004

IgE (>367 KU/L)

44 (20.4)

62 (28.7)

1.57 (1.01–2.45)

0.045

Serotonin (<113.57 ng/mL)

45 (20.8)

63 (29.2)

1.57 (1.01–2.43)

0.046

  1. Abbreviations: ADHD, attention-deficit hyperactivity disorder; OR, odds ratios; 95% CI, 95% confidence interval.
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