TableĀ 3

Manchester Self-Harm Rule* as applied to the Swedish dataset

Manchester Self-Harm RuleRepeaterNon-repeaterTotal
Moderate/high risk2759551230
Low risk34260294
Total cases30912151524
Sensitivity89% (275/309)
Specificity21% (260/1215)
Positive predictive values22% (275/1230)
Negative predictive values88% (260/294)
Proportion repeater20%
  • *The Manchester Self-Harm Rule includes the variables: history of self-harm, previous psychiatric treatment, benzodiazepine taken as overdose and current psychiatric treatment.