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. Author manuscript; available in PMC: 2019 Jan 28.
Published in final edited form as: J Int Neuropsychol Soc. 2018 Nov 16;25(1):79–89. doi: 10.1017/S1355617718000851

Table 3.

Results of Logistic Regressions Examining Interactions Between Cognitive Composite Scores and mTBIBurden Predicting Suicidal Ideation.

Attention/PS Composite
 Memory Composite
R2 B SE OR [95% CI] p R2 B SE OR [95% CI] p
Model 1 .031 .087
 Cognitive composite −.23 .26 .80 [.49, 1.29] .370 .20 .22 1.22 [.79, 1.90] .360
 mTBI burden −.29 .37 .75 [.37, 1.50] .410 −.47 .53 .63 [.28, 1.39] .302
 Cognitive composite x mTBI burden .77 .41 2.17 [1.05, 4.46] .028* 1.27 .60 3.57 [1.32, 9.65] .009*
Model 2 .128 .156
 Cognitive composite −.35 .29 .82 [.40, 1.68] .618 .12 .23 1.13 [.72, 1.79] .576
 mTBI burden −.20 .40 .70 [.43, 1.16] .199 −.42 .51 .66 [.29, 1.48] .340
 Cognitive composite x mTBI burden .87 .44 2.39 [1.13, 5.05] .020* 1.22 .65 3.40 [1.22, 9.51] .018*
 PTSD symptoms (PCL-C) .05 .01 1.05 [1.02, 1.07] .001* .04 .01 1.04 [1.02, 1.07] .001*
Model 3 .279 .271
 Cognitive composite −.54 .30 .58 [.34, 1.00] .048* .19 .24 1.21 [.74, 1.96] .386
 mTBI burden −.37 .46 .69 [.32, 1.50] .394 −.42 .53 .66 [.29, 1.51] .376
 Cognitive composite x mTBI burden 1.23 .55 3.42 [1.50, 7.79] .007* .91 .60 2.48 [.90, 6.87] .078
 Depression symptoms (BDI-II) .12 .02 1.13 [1.08, 1.17] .001* .10 .02 1.10 [1.06, 1.15] .001*
Model 4 .267 .284
 Cognitive composite −.63 .39 .53 [.26, 1.09] .082 .21 .37 1.23 [.66, 2.30] .572
 mTBI burden −.18 .51 .83 [.35, 1.96] .700 −.31 .58 .73 [.30, 1.81] .525
 Cognitive composite x mTBI burden 1.28 .58 3.59 [1.37, 9.41] .009* 1.15 .67 3.16 [.98, 10.13] .038*
 Postconcussive symptoms (NSI) .08 .02 1.09 [1.05, 1.12] .001* .08 .02 1.08 [1.04, 1.11] .001*
*

Notes: p <.05; mTBI burden is dichotomous: 1–2 vs. 3 or more mild traumatic brain injuries; neuropsychological measures were coded such that higher scores reflected greater impairment; R2 is Nagelkerke’s method; Abbreviations: OR = odds ratio; CI = confidence interval; PTSD = posttraumatic stress disorder; PCL-C = PTSD Checklist Civilian Version; BDI-II = Beck Depression Inventory-Second Edition; NSI = Neurobehavioral Symptom Inventory; PS = processing speed.