Table 2.

The between-group comparisons on cognitive performances among the patients without suicidal ideation (SI–), the patients with suicidal ideation (SI+) and healthy controls (HC) using one-way analysis of variance (ANOVA) followed by Tukey HSD post-hoc tests.

	SI− (n = 45)	SI+ (n = 18)	HC (n = 44)	ANOVA	Tukey
	(Mean ± SD)	(Mean ± SD)	(Mean ± SD)
WAIS-I score	15.47 ± 4.22	17.89 ± 5.82	19.15 ± 4.41	F = 7.271, p = 0.001	SI– < HC
WAIS-DS score	62.04 ± 14.08	66.06 ± 15.65	85.25 ± 10.28	F = 38.219, p < 0.001	SI–, SI+ < HC
2-back target-accuracy (%)	46.80 ± 24.91	55.89 ± 26.11	69.90 ± 20.29	F = 11.170, p < 0.001	SI– < HC
2-back target-RT (ms)	725.48 ± 199.40	675.70 ± 131.28	627.01 ± 146.34	F = 3.785, p = 0.026	SI– > HC
2-back non-target-accuracy (%)	79.38 ± 20.59	77.83 ± 27.50	84.72 ± 16.61	F = 1.078, p = 0.344
2-back non-target-RT (ms)	664.39 ± 191.59	650.12 ± 204.89	634.06 ± 144.07	F = 0.331, p = 0.719