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Table 4 Results from a binominal logistic regression (additional model) with a stepwise forward selection method (likelihood ratio). Suicide cases, n = 154; Controls, n = 154

From: Are quantity and content of psychiatric interventions associated with suicide? A case-control study of a Swedish sample

Additional model** B (SE) Wald Sig. OR (CI) 95% CI for OR
     Lower Upper
Intervention form: 12.153 .007
 Combination treatment 2 −1.113 (0.325) 11.746 .001 0.329 0.174 0.621
 Psychotherapy3 −0.065 (1.010) 0.004 .949 0.937 0.129 6.788
 Psychotropics4     reference   
 Other5 0.053 (0.401) 0.017 .895 1.054 0.480 2.316
Serious suicide attempt (yes)1 0.950 (0.357) 7.074 .008 2.585 1.284 5.206
  1. Note: The dependent outcome variable ‘Suicide’ was dichotomized (Yes = 1, No = 0)
  2. Abbreviations: B: beta coefficient, SE: standard error, OR: odds ratio / expected beta coefficient, CI: confidence interval for OR. For each step, the entry testing was based on the significance of the score statistic, and removal testing was based on the probability of a likelihood-ratio statistic. Degrees of freedom (df): 1 in all steps, except for ‘Intervention form’ (df = 3)
  3. 1 Somatic specialist medical inpatient treatment due to serious suicide attempt; for diagnostic ICD-10 codes, see Appendix
  4. 2 Combination treatment: psychotropics and psychotherapy (CBT, DBT, PDT, or other structured psychotherapy)
  5. 3 Mono treatment: psychotherapy without psychotropics
  6. 4 Mono treatment: psychotropics without psychotherapy
  7. 5 Other interventions (e.g., supportive conversation)
  8. **Additional model: Five predictor variables/covariates entered in the stepwise forward analysis: ‘Intervention form’, ‘CBT’ (incl. DBT), ‘Other structured psychotherapy’, ‘Serious suicide attempt’, and ‘Somatic comorbidity’. The variable ‘Number of outpatient visits’ was excluded from this model. Additional model fit: R2 = 0.084 (Nagelkerke). Model χ2 = 20.155; p = .001