This updated version of OxMIV was externally validated in 1,145 individuals presenting to UK EIP (Early Intervention in Psychosis) services.

This tool predicts perpetration of interpersonal violence in the 12-months after assessment, defined as violence to others either 1) resulting in police contact, 2) involving a weapon, or 3) causing physical injury (e.g. bleeding, bruising or injury requiring hospital attendance). This is a specific adaptation to the OxMIV model to take into account perpetration of interpersonal violence that is clinically significant but may not lead to conviction, and means that the baseline risk is different to the original OxMIV model developed in Sweden (where the predicted outcome was criminal conviction alone).

The weighting of predictors in the model is the same as the original OxMIV model, but the baseline risk has been updated for this outcome and population. A 10% cut-off is therefore used to define categories (whereas the original model used a lower cut-off of 5% to account for conviction outcome).

Low risk needs category: This includes everyone with risk less than 10%. In the validation study, out of every 100 individuals in this category, 5 perpetrated interpersonal violence in the next year.

Increased risk needs category: This includes everyone with risk over 10%. In the validation study, out of every 100 individuals in this category, 22 perpetrated interpersonal violence in the next year.

The baseline risk for interpersonal violence within 12 months for OxMIV-EIP was 11%.

* If one or more of these variables are set to ‘unknown’, a range of risk levels will be displayed.

OxMIV should only be used for individuals with schizophrenia-spectrum and bipolar disorders.

The content of the OxRisk website (including the risk calculators) is accurate according to the opinions of the authors of the calculators. The information and directions may or may not apply to specific individuals considered for assessment. The calculators provide a ‘best guess’ of likely outcomes based on current knowledge, but cannot provide an accurate prediction for each individual. Determination of appropriate application and scoring of the OxRisk calculators to specific cases and in specific jurisdictions requires the judgement of a clinician or criminal justice professional. OxRisk calculators are intended to be an adjunct to clinical decision-making.

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