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Table 1 Baseline characteristics and assessment of blinding success and sensation

From: Transcranial direct current stimulation to the left dorsolateral prefrontal cortex enhances early dexterity skills with the left non-dominant hand: a randomized controlled trial

 

Active (n = 33)

Sham (n = 33)

p-value

Statistics

Participant demographics

 Age (years; mean [SD])

22.7 (1.33)

22.8 (2.07)

0.83

t = − 0.21

Sex

  

0.62

χ2 = 0.24

 Male (n (%))

17 (51.5)

15 (45.5)

  

 Female (n (%))

16 (48.5)

18 (54.5)

  

 Edinburgh Handedness Inventory mean (SD)

97.52 (6.80)

97.91 (5.53)

0.80

t = − 0.26

 Blinding

  

0.22

χ2 = 1.54

 Felt stimulated (n (%))

17 (51.5)

12 (36.3)

  

 Felt non-stimulated (n (%))

16 (48.5)

21 (63.7)

  

Sensation questionnaire (Median [IQR])

 Itching

1.0 (0.0–1.0)

1.0 (0.0–1.0)

0.30

χ2 = 2.43

 Pain

0.0 (0.0–0.0)

0.0 (0.0–0.5)

0.56

χ2 = 1.15

 Burning

0.0 (0.0–0.0)

0.0 (0.0–0.0)

0.39

χ2 = 0.73

 Warmth/Heat

0.0 (0.0–0.5)

0.0 (0.0–0.0)

0.55

χ2 = 0.36

 Pinching

0.0

0.0

N/A

N/A

 Metallic

0.0

0.0

N/A

N/A

 Fatigue

0.0 (0.0–0.5)

0.0 (0.0–1.0)

0.73

χ2 = 0.64

 Others

0.0 (0.0–0.0)

0.0 (0.0–0.0)

0.54

χ2 = 1.22

  1. SD standard deviation, IQR interquartile range