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Table 4 Multivariate binomial logistic regression predicting suicidal thoughts and behavior (interaction effects)

From: The relationship between age and suicidal thoughts and attempted suicide among prisoners

 Suicidal Thoughts OnlyaAttempted SuicideSuicidal Thoughts/Attempts
aOR (SE)95% CIaOR (SE)95% CIaOR (SE)95% CI
Hopelessness
 Age x Hopelessness0.942 (0.047)0.858–1.030.944 (0.043)0.866–1.030.948 (0.039)0.878–1.02
 Age2 x Hopelessness1.001 (0.0006)1.00–1.0021.001 (0.0006)1.00–1.0021.001 (0.0005)1.00–1.002
Physical Illnessb
 Age x Physical Illness1.06 (0.037)0.990–1.15 1.04 (0.043)0.961–1.131.07 (0.032)1.006–1.14*
 Age2 x Physical Illness0.999 (0.0005)0.998–0.999*1.00 (0.0006)0.998–1.0010.999 (0.0004)0.998–0.999*
BADL Disabilityb
 Age x BADL Disability1.02 (0.038)0.945–1.100.959 (0.041)0.884–1.040.995 (0.031)0.935–1.06
 Age2 x BADL Disability1.00 (0.0005)0.999–1.0011.001 (0.0005)1.00–1.0021.00 (0.0004)0.999–1.001
Constant0.026 (0.545)0.009–0.075***0.052 (0.592)0.016–0.165***0.089 (0.442)0.037–.212***
 n = 14,863n = 17,230n = 17,230
Likelihood-ratio χ2(32)1628.26***3856.31***5039.48***
−2 Log Likelihood8637.239913.8713,581.19
AIC8703.239979.8613,647.19
  1. Note. All main effect variables were entered into regression models—only interaction effects are presented as main effects are redundant; AIC Akaike’s Information Criterion; models report adjusted odds ratios, Huber-White (robust) standard errors, and 95% confidence intervals
  2. aInmates who reported a suicide attempt are excluded from analysis
  3. bBinary-coded variable
  4. p < .10, *p < .05, **p < .01, ***p < .001
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