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Table 2 Frequency (percentage) of echogenicity of different areas in patients participating in the study

From: Echogenicity and size of substantia nigra on transcranial sonography (TCS) in patients with attention-deficit/hyperactivity disorder and healthy children aged 6–12 years: a comparative study

Variables

Control

ADHD

P value

Hypoecho

Isoecho

Hyperecho

Hypoecho

Isoecho

Hyperecho

Echogenicity of substantia nigra nuclei

0 (0)

21 (72.4)

13 (33.3)

0 (0)

8 (27.6)

26 (66.7)

< 0.001

Echogenicity of thalamic nuclei

32 (55.2)

2 (20)

0 (0)

26 (44.8)

8 (80)

0 (0)

0.04

Echogenicity of caudate nucleus

0 (0)

32 (51.6)

2 (33.3)

0 (0)

30 (44.8)

4 (66.7)

0.67

Echogenicity of putamen nucleus

0 (0)

32 (50)

2 (50)

0 (0)

32 (50)

2 (50)

1.00

Echogenicity of raphe nucleus

4 (66.7)

12 (48)

16 (45.7)

2 (33.4)

13 (52)

19 (54.3)

0.63