Consecutive sessions of transcranial direct current stimulation do not remediate visual hallucinations in Lewy body dementia: a randomised controlled trial

Table 4 Attentional and visuoperceptual task comparisons (day 0 vs day 5)

	Active n = 19				Placebo n = 17
	Day 0		Day 5		Day 0		Day 5
	Mean	SD	Mean	SD	Mean	SD	Mean	SD
Attentional tasks
SRT: correct answers (%)^a	94.51	6.87	91.76	14.34	89.05	15.49	85.48	22.29
SRT: mean RT (ms), correct answers^b	542.36	213.12	501.36	182.91	760.89	535.01	593.98	185.55
SRT: coefficient of variation (%)^a	51.99	30.36	52.17	31.54	80.83	41.47	74.17	51.63
CRT: correct answers (%)^c	79.26	23.11	81.85	26.82	69.11	34.19	79.33	22.75
CRT: mean RT (ms), correct answers^d	863.29	333.03	808.24	218.21	946.87	260.95	1059.19	576.05
CRT: coefficient of variation (%)^e	56.86	35.59	44.83	29.18	46.68	27.93	56.56	40.12
DV: correct answers (%)^f	65.45	24.11	63.37	24.73	59.07	24.92	60.37	21.76
DV: mean RT (ms), correct answers^g	676.68	97.96	675.88	135.74	683.95	96.12	661.17	125.49
DV: coefficient of variation (%)^h	29.90	12.23	29.77	14.08	32.21	14.56	41.27	18.68
Visuoperceptual tasks
Angle: correct answers (%)ⁱ	72.92	21.84	74.17	15.23	70.83	19.23	70.00	14.56
Angle: difficulty (degrees)ⁱ	41.34	31.79	39.89	30.47	48.48	34.65	47.87	30.83
Motion: correct answers (%)^j	53.81	17.97	55.95	16.29	55.28	15.86	56.11	10.72
Motion: difficulty (relative speed)^j	3.57	0.89	3.49	0.97	3.66	0.71	3.91	0.12

SD standard deviation, SRT simple reaction time, RT reaction time, CRT choice reaction time, DV digit vigilance
^aActive n = 17, placebo n = 14 (due to incomplete data or removal of RT > 2SD)
^bActive n = 15, placebo n = 12 (due to incomplete data or removal of RT > 2SD)
^cActive n = 18, placebo n = 15 (due to incomplete data or removal of RT > 2SD)
^dActive n = 16, placebo n = 11 (due to incomplete data or removal of RT > 2SD)
^eActive n = 18, placebo n = 13 (due to incomplete data or removal of RT > 2SD)
^fActive n = 16, placebo n = 15 (due to incomplete data or removal of RT > 2SD)
^gActive n = 15, placebo n = 10 (due to incomplete data or removal of RT > 2SD)
^hActive n = 16, placebo n = 13 (due to incomplete data or removal of RT > 2SD)
ⁱActive n = 16, placebo n = 12 (due to incomplete data or removal of RT > 2SD)
^jActive n = 14, placebo n = 12 (due to incomplete data or removal of RT > 2SD)

ISSN: 1758-9193