TABLE 2.

Results of primary linear mixed model of suicidal ideation before and after suicide attempt

Generalized linear mixed model, outcome = “worse-thanusual” suicidal ideation	Slope	SE	DF	t value	P
Fixed Effects
Intercept	−1.40	0.37	846	−3.74	.0002
Female (vs Male)	−0.16	0.17	2155	−0.92	.36
No previous suicide attempt (vs yes)	−0.79	0.18	2155	−4.30	<.0001
Age at enrollment (years)	0.00	0.01	2155	0.25	.80
Pre-event time (in months)	0.10	0.11	513	0.96	.34
Attempter (vs Non-Attempter)	1.56	0.27	2155	5.84	<.0001
Pre-event time * Attempter (vs Non-Attempter)	0.12	0.13	2155	0.88	.38
Post-event time (in months)	−0.34	0.20	628	−1.73	.08
Post-event time (quadratic)	0.06	0.05	2155	1.16	.25
Post-event time * Attempter (vs Non-Attempter)	−0.63	0.31	2155	−2.03	.04
Post-event time (quadratic) * Attempter (vs. Non-Attempter)	0.08	0.09	2155	0.89	.37
Rate of change 30 days pre- and post-event, by group
Non-attempters at 30 days pre-event	0.10	0.11	2155	0.96	.34
Non-Attempters at 30 days post-event	−0.21	0.12	2155	−1.86	.06
Attempters at 30 days pre-event	0.22	0.10	2155	2.16	.031
Attempters at 30 days post-event	−0.69	0.13	2155	−5.41	<.0001

Note: Model included random intercept and slopes for pre-event and post-event time. Interactions between covariates (age, gender, and history of suicide attempt) and time variables were tested and discarded as non-contributory. Parameters are in log-odds. Predicted probabilities for each group, by time point, are shown in Table 3. Trajectories are illustrated in Figure 1.

Abbreviations: SE, standard error; DF, degrees of freedom.