Table 2 Factors associated with the number of incidents of self-harming behaviors
Variable | Model 1 (n = 841) | Model 2 (n = 808) | Model 3 (n = 808) | Model 4 (n = 693) | |
|---|---|---|---|---|---|
χ2 = 6.89 | χ2 = 63.92 | χ2 = 68.46 | χ2 = 74.56 | ||
Pseudo R2 = 0.0178 | Pseudo R2 = 0.1742 | Pseudo R2 = 0.2197 | Pseudo R2 = 0.2406 | ||
p-value = 0.032 | p-value < 0.001 | p-value < 0.001 | p-value < 0.001 | ||
Incidence Rate Ratio [IRR] (95% CI) | IRR (95% CI) | IRR (95% CI) | IRR (95% CI) | ||
Constant | 0.17 (0.02–1.40) ** | 0.11 (0.01–0.79) ** | 0.09 (0.01–0.81) ** | 0.09 (0.01–3.45) | |
Patient demographic characteristics | Age | 0.98 (0.94–1.03) | 0.94 (0.90–1.00) | 0.89 (0.82–0.97) * | 0.90 (0.83–0.98) * |
Female gender | 5.02 (1.23–20.40) ** | 0.42 (0.07–2.66) | 0.39 (0.05–3.16) | 0.42 (0.06–3.08) | |
Clinical characteristics | Previous hospitalization for a psychiatric condition | 0.69 (0.17–2.89) | 0.80 (0.14–4.43) | 0.64 (0.11–3.81) | |
Primary psychiatry diagnosis | |||||
Mood disorders | 0.72 (0.07–6.87) | 7.00 e-07 (0 -.) | 1.01 e-07 (0 -.) | ||
Others | 27.72 (6.75–113.80) ** | 10.03 (2.03–49.60) | 12.14 (0.11–70.34) | ||
Previous history of engaging in self-harming behaviors | 11.28 (3.65–34.85) ** | 11.22 (3.00–41.88) ** | 9.21 (2.33–36.39) * | ||
Years in criminal justice system since index offence | 1.08 (1.01–1.17) * | 1.12 (0.99–1.27) | 1.12 (0.99–1.26) | ||
Victim characteristics | Victims’ gender female | 1.43 (0.37–5.44) | 1.23 (0.33–4.53) | ||
Victim’s relationship | |||||
Acquaintance | 1.27 (0.13–12.33) | 0.88 (0.08–9.56) | |||
Friend | 0.96 (0.01–61.67) | 0.81 (0.01–86.17) | |||
First degree relatives (Son/daughter/Sibling) | 3.02 (0.50–18.20) | 2.73 (042–17.75) | |||
Lover/partner/spouse | 5.26 (0.35–79.23) | 3.88 (0.25–61.26) | |||
Other/extended family members | 3.42 (0.16–72.65) | 3.43 (0.14–81.30) | |||
Legal authority figure | 2.74 (0.22–32.97) | 2.23 (0.17–28.41) | |||
Healthcare/support staff | 35.43 (3.89–322.89) * | 32.69 (3.41–313.62) * | |||
Co-habitant/co-patient | 121.13 (6.52–2250.23) * | 67.01 (4.04–1114.63) * | |||
Others | 4.99e-07 (0–.) | 4.29 e-08 (0 -.) | |||
Victim injury severity and outcomes | |||||
Injury requiring hospitalization | 2.71 (0.61–11.97) | 1.98 (0.38–10.29) | |||
Injury resulting in death | 2.93 (0.35–24.58) | 2.32 (0.27–19.53) | |||
Circumstance during the index offence | Weapon used | 1.82 (0.36–9.31) | |||
Intoxicated | 2.33 e-08 (0 -.) | ||||
Number of offences | 0.99 (0.67–1.47) | ||||