Table 3. Group Differences in DKEFS Inhibition Errors, with High-Lethality Suicide Attempters as a Reference Group (n=100).

		Model 1: age-corrected					Model 2: age-, and MMSE-corrected**					Model 3: age-, MMSE-, and color-naming accuracy-corrected**,***
Independent variable	chi2****	P-Value	ηp2	Post-hoc	AIC	chi2	P-Value	ηp2	Post-hoc	AIC	chi2	P-Value	ηp2	Post-hoc	AIC
Inhibition Self-Corrected Errors
					346					343					337
Group	9.5	.050	.123	HSA> D, SI, HC		5.3	.26	.089	NS		7.0	.14	.093	NS
Age	0.8	.38	.006	-		0.22	.64	.002	-		0.0	.83	.004	-
MMSE	-	-		-		5.0	.026	.083	-		4.8	.029	.086	-
Color-naming self-corrected errors	-	-		-		-	-		-		6.3	.012	.004	-
Inhibition Uncorrected Errors
					245					239					235
Group	21.4	<.001	.116	LSA> D, HC HSA>D		18.1	.001	.126	LSA> HC, D		9.3	.055	.122	NS
Age	6.3	.012	.032	-		4.2	.039	.026	-		3.1	.077	.020	-
MMSE	-	-		-		9.1	.003	.077	-		5.9	.016	.071	-
Color-naming uncorrected errors	-	-		-		-	-		-		4.6	.031	.005	-

HSA: High-Lethality Suicide Attempters, LSA: Low-Lethality Suicide Attempters, SI: Suicide Ideators, D: Depressed control subjects, HC: Healthy Control subjects.

NS: Non significant.

η_p²: Partial Eta squared

^*Generalized linear model using a negative binomial log link.

^**Two participants with missing MMSE scores were excluded from every model to compare fits.

^***Gender and time to completion did not explain additional variance in any of the models. Any variance explained by education was absorbed by the MMSE.

^****df: group, 4; continuous predictors, 1.