Table 3.
Results of mediation analysis.
| Distal risk factor | Path | B | SE | 95% CI |
|---|---|---|---|---|
| CT (R2 = 0.309) | Direct effect of CT on PLEs (a1) | 2.229 | 0.282 | 1.675–2.782 |
| Direct effect of CT on depression (a2) | 2.496 | 0.275 | 1.957–3.036 | |
| Direct effect of CT on insomnia (a3) | 1.677 | 0.216 | 1.253–2.100 | |
| Direct effect of PLEs on suicidal ideation (b1) | 0.063 | 0.011 | 0.041–0.084 | |
| Direct effect of depression on suicidal ideation (b2) | 0.182 | 0.012 | 0.158–0.206 | |
| Direct effect of insomnia on suicidal ideation (b3) | 0.090 | 0.014 | 0.063–0.116 | |
| Direct effect of CT on suicidal ideation (c’) | 0.213 | 0.178 | −0.137–0.563 | |
| Indirect effect of CT (through PLEs) on suicidal ideation (a1b1) | 0.140 | 0.030 | 0.084–0.201 | |
| Indirect effect of CT (through depression) on suicidal ideation (a2b2) | 0.454 | 0.058 | 0.349–0.574 | |
| Indirect effect of CT (through insomnia) on suicidal ideation (a3b3) | 0.150 | 0.029 | 0.099–0.213 | |
| ADHD (R2 = 0.309) | Direct effect of ADHD on PLEs (a1) | 0.206 | 0.008 | 0.191–0.221 |
| Direct effect of ADHD on depression (a2) | 0.234 | 0.007 | 0.220–0.248 | |
| Direct effect of ADHD on insomnia (a3) | 0.106 | 0.006 | 0.094–0.119 | |
| Direct effect of PLEs on suicidal ideation (b1) | 0.061 | 0.011 | 0.039–0.083 | |
| Direct effect of depression on suicidal ideation (b2) | 0.180 | 0.013 | 0.155–0.204 | |
| Direct effect of insomnia on suicidal ideation (b3) | 0.090 | 0.014 | 0.064–0.117 | |
| Direct effect of ADHD on suicidal ideation (c’) | 0.004 | 0.006 | −0.007–0.015 | |
| Indirect effect of ADHD (through PLEs) on suicidal ideation (a1b1) | 0.013 | 0.003 | 0.008–0.018 | |
| Indirect effect of ADHD (through depression) on suicidal ideation (a2b2) | 0.042 | 0.003 | 0.036–0.049 | |
| Indirect effect of ADHD (through insomnia) on suicidal ideation (a3b3) | 0.010 | 0.002 | 0.007–0.013 | |
| RD (R2 = 0.320) | Direct effect of RD on PLEs (a1) | 0.283 | 0.015 | 0.255–0.312 |
| Direct effect of RD on depression (a2) | 0.286 | 0.014 | 0.258–0.314 | |
| Direct effect of RD on insomnia (a3) | 0.148 | 0.012 | 0.125–0.170 | |
| Direct effect of PLEs on suicidal ideation (b1) | 0.052 | 0.011 | 0.030–0.073 | |
| Direct effect of depression on suicidal ideation (b2) | 0.172 | 0.012 | 0.148–0.196 | |
| Direct effect of insomnia on suicidal ideation (b3) | 0.090 | 0.014 | 0.063–0.117 | |
| Direct effect of RD on suicidal ideation (c’) | 0.049 | 0.009 | 0.032–0.067 | |
| Indirect effect of RD (through PLEs) on suicidal ideation (a1b1) | 0.015 | 0.003 | 0.008–0.022 | |
| Indirect effect of RD (through depression) on suicidal ideation (a2b2) | 0.049 | 0.004 | 0.041–0.058 | |
| Indirect effect of RD (through insomnia) on suicidal ideation (a3b3) | 0.013 | 0.002 | 0.009–0.018 | |
| NSSI (R2 = 0.322) | Direct effect of NSSI on PLEs (a1) | 2.313 | 0.215 | 1.892–2.734 |
| Direct effect of NSSI on depression (a2) | 2.829 | 0.208 | 2.422–3.236 | |
| Direct effect of NSSI on insomnia (a3) | 1.027 | 0.166 | 0.701–1.353 | |
| Direct effect of PLEs on suicidal ideation (b1) | 0.058 | 0.011 | 0.037–0.080 | |
| Direct effect of depression on suicidal ideation (b2) | 0.173 | 0.012 | 0.149–0.197 | |
| Direct effect of insomnia on suicidal ideation (b3) | 0.093 | 0.014 | 0.066–0.120 | |
| Direct effect of NSSI on suicidal ideation (c’) | 0.228 | 0.032 | 0.164–0.291 | |
| Indirect effect of NSSI (through PLEs) on suicidal ideation (a1b1) | 0.135 | 0.031 | 0.079–0.201 | |
| Indirect effect of NSSI (through depression) on suicidal ideation (a2b2) | 0.489 | 0.052 | 0.397–0.598 | |
| Indirect effect of NSSI (through insomnia) on suicidal ideation (a3b3) | 0.096 | 0.022 | 0.057–0.143 |
Covariates include age, sex, being married or in a relationship, education level, and the current occupational situation.
Abbreviations: ADHD, attention-deficit/hyperactivity disorder; CT, childhood trauma; NSSI, non-suicidal self-injuries; RDs, reading disabilities.