Table 1.
Stimulation sensation reports and blinding results from transcranial direct current stimulation.
| Sham | 2 mA | 4 mA | ||||
|---|---|---|---|---|---|---|
| Women | Men | Women | Men | Women | Men | |
| Sensation | ||||||
| Tingling | 2.0 ± 0.0 (n = 1) | 1.8 ± 0.8 (n = 5) | 2.8 ± 1.0 (n = 4) | 1.8 ± 1.1 (n = 5) | 5.0 ± 0.0 (n = 1) | 2.7 ± 1.5 (n = 6) |
| Itching | 2.7 ± 1.5 (n = 3) | 1.7 ± 0.6 (n = 3) | 4.3 ± 1.2 (n = 8) | 3.5+ 0 0.7 (n = 2) | 4.0 ± 1.8 (n = 6) | 2.0 ± 1.0 (n = 3) |
| Burning | 4.0 ± 1.4 (n = 2) | 2.7 ± 0.6 (n = 3) | 3.7 ± 3.1 (n = 3) | 1.6 ± 0.9 (n = 5) | 6.0 ± 1.4 (n = 5) | 4.0 ± 1.4 (n = 5) |
| Prickling | 3.0 ± 1.2 (n = 4) | NR | 5.5 + 0.7 (n = 2) | 3.0 ± 0.0 (n = 1) | 4.0 ± 0.0 (n = 1) | NR |
| Poking | 6.0 ± 0.0 (n = 1) | NR | NR | NR | 2.0 ± 0.0 (n = 1) | 4.0 ± 0.0 (n = 1) |
| Pins/Needles | NR | NR | 3.0 ± 0.0 (n = 1) | NR | 6.0 ± 0.0 (n = 1) | 2.0 ± 1.4 (n = 2) |
| Stinging | NR | 1.5 ± 0.7 (n = 2) | NR | 2.0 ± 0.0 (n = 2) | NR | NR |
| Pinching | NR | NR | 4.0 ± 0.0 (n = 1) | NR | NR | NR |
| Blinding | ||||||
| Guessed sham | 60% | 70% | 20% | 20% | 20% | 10% |
| Guessed 2 mA | 40% | 30% | 50% | 60% | 40% | 40% |
| Guessed 4 mA | 0% | 0% | 30% | 20% | 40% | 50% |
Sensations were reported on a 10-point Likert-type scale (1 = “barely perceptible” and 10 = “most I could possible stand”). Blinding results are percent guessed (correct guesses bolded). NR = none reported.