Table 3.

Odds ratios from generalized estimating equations predicting follow-up suicide ideation

Baseline Predictors	Suicide Ideation at Follow-Up
	OR	95% CI
Model 1: Main-effects model
Lifetime suicide ideation	7.64***	3.32–17.57
Age	1.21	0.94–1.56
Depressive symptoms	3.34**	1.52–7.34
Friendship support	0.55*	0.34–0.89
Prespeech standing RSA	0.90	0.70–1.16
Standing-speech ΔRSA	0.59**	0.40–0.86
Model 2: Interaction-effect model
Lifetime suicide ideation	7.87***	3.35–18.46
Age	1.17	0.93–1.49
Depressive symptoms	3.60**	1.60–8.09
Friendship support	0.46***	0.30–0.71
Prespeech standing RSA	0.87	0.67–1.13
Standing-speech ΔRSA	0.54**	0.38–0.78
Prespeech Standing RSA × Friendship Support	0.91	0.67–1.22
Standing-Speech ΔRSA × Friendship Support	0.63*	0.42–0.95

Note: RSA, Respiratory sinus arrhythmia; ΔRSA, RSA standardized residual scores.