Suicide risk stratification in adolescents with psychiatric disorders

Figures & data

Table 1. Response probabilities to suicidal ideation item conditional on class membership (five-class model).

	Five-class model
Latent Class	Self-harm	Desire for death	Suicidal ideation	Ideation method	Intention 1	Planning	Intention 2	Attempt preparation	Suicide attempt	Probabilities of membership
1. Planners with intent	.856	.999	.999	.999	.958	.872	.631	.985	.830	.290
2. Unintentional planners	.248	.230	.001	.969	.969	.798	.462	.797	.001	.083
3. Non-planners with specific ideation	.676	.999	.972	.864	.793	.341	.328	.110	.008	.163
4. Non-planners with nonspecific ideation	.805	.999	.794	.001	.084	.001	.001	.105	.405	.189
5. Non-ideators	.171	.375	.001	.008	.001	.001	.001	.011	.001	.272

1. Have you had a self-harming behavior -self-harm- not suicidal? (Self-harm).

2. Have you ever wished you were dead or wished you could sleep and not wake up? (Desire For Death).

3. Have you ever thought of committing suicide? (Suicidal Ideation).

4. Have you thought about how you would carry it out? (Ideation Method).

5. Have you had these ideas and, to some degree, the intention to carry them out? (Intention 1).

6. Have you started to elaborate or worked out the details of how to commit suicide? (Planning).

7. Do you intend to carry out this plan (Intention 2)?.

8. Have you done something, started to do something, or prepared to do something to end your life? (Attempt Preparation).

9. Dichotomized Suicide attempt (Suicide Attempt).

Table 2. Comparison of suicidal ideation models.

Number of Classes	AIC	BIC	Adjusted BIC	LMR p-value	BLRT p-value	Entropy
2	3400.82	3476.08	3415.79	<.001	<.001	.956
3	3204.49	3319.36	3227.34	<.001	<.001	.912
4	3029.06	3183.54	3059.80	<.001	<.001	.935
5	2940.94	3135.03	2979.56	<.001	<.001	.931
6	2932.04	3165.74	2978.54	=.005	<.001	.936
7	2928.12	3201.43	2982.50	<.001	.002	.946
8	2933.98	3246.90	2996.24	.131	.307	.936

Note: AIC = Akaike Information Criterion; BIC = Bayesian Information Criterion; LMR = Lo-Mendell-Rubin Test; BLRT = Bootstrap Likelihood Ratio Test.

In bold the lowest AIC, BIC, and Adjusted BIC.

Table 3. Average latent class probabilities.

	Class 1	Class 2	Class 3	Class 4	Class 5
Class 1	.973	.000	.027	.000	.000
Class 2	.000	.997	.010	.007	.000
Class 3	.033	.003	.951	.074	.000
Class 4	.000	.000	.058	.939	.003
Class 5	.000	.000	.001	.000	.925

Table 4. Sociodemographic and clinical characteristics for each class.

	Non-planners with specific ideation		Planners with intent		Non-ideators		Non-planners with nonspecific ideation		Unintentional planners
	N	%	N	%	N	%	N	%	N	%
Sex
Female	38	64,4	87	76,3	51	44,7	29	42.0	25	78.1
Male	21	35,6	27	23,7	63	55,3	40	58.0	7	21.9
Age
Early (10–13)	5	8.5	5	4.4	28	24.6	8	11.6	5	15.6
Middle (14–16)	43	72.9	79	69.3	73	64.0	52	75.4	27	84.4
Late (17–21)	11	18.6	30	26.3	13	11.4	9	13.0	0	0.0
Do you live with?
Both parents	27	45.8	49	43.0	57	50.0	39	56.5	17	53.1
Mother only	25	42.4	43	37.7	45	30.5	27	39.1	12	37.5
Father only	4	6.8	7	6.1	6	5.3	1	1.4	1	3.1
Neither	3	5.1	15	13.2	6	5.3	2	2.9	2	6.3
Siblings
No siblings	33	55.9	69	60.5	64	56.1	37	53.6	23	71.9
One or two	5	8.5	12	10.5	7	6.1	5	7.2	1	3.1
Three or more	21	35.6	33	28.9	43	37.7	27	39.1	8	25.0
Depressive disorder
Yes	22	37.3	66	57.9	13	11.4	18	26.1	2	6.3
No	37	62.7	48	42.1	101	88.6	51	73.9	30	93.7
Anxiety disorder
Yes	7	11.9	17	14.9	22	19.3	13	18.8	3	9.4
No	52	88.1	97	85.1	92	80.7	56	81.2	29	90.6
Neuro disorder
Yes	2	3.4	4	3.5	30	26.3	11	15.9	12	37.5
No	57	96.6	110	96.5	84	73.7	58	84.1	20	62.5

Table 5. Multinomial regression. Relationship between sex, age, living with parents, and membership in the suicidal ideation classes.

	Unintentional planner vs. non-ideator			Non-planner with specific ideation vs. non-ideator			Planner with intent vs. non-ideator			Non-planner with nonspecific ideation vs. non-ideator
	B	OR	p	B	OR	p	B	OR	p	B	OR	P
Sexo	−1.35	0.25	.005	−0.85	0.42	.020	−1.35	0.25	<.001	0.20	1.22	.621
Edad	0.47	1.60	.361	1.41	4.11	.010	2.06	7.87	<.001	1.22	3.40	.022
Padres	−0.37	0.69	.664	0.96	2.62	.415	−0.92	0.39	.147	0.66	1.94	.454

Note: OR = odds ratio.

Data availability statement

The data that support the findings of this study are available from the corresponding author, [PMB], upon reasonable request.