Table 1 Scenarios examined in the simulation analyses (additional details are provided in Additional file 1)
Intervention | Description |
|---|---|
1. Mental health and suicide prevention interventions | |
 a. Post-attempt assertive aftercare | Post-attempt assertive aftercare is an active outreach and enhanced contact program to reduce readmission in those presenting to services after a suicide attempt. It includes individually tailored contact, solution focused counselling, and motivations to adherence to follow-up treatments and continuity of contact. |
 b. Social connectedness programs | Programs designed to increase community connectedness, reducing isolation, and enhancing resilience and applied universally. No assumptions are made about the details of the particular programs implemented as these are community designed and are likely to differ across communities. |
 c. Community-based acute care services | Responsive clinical mental health services delivered by community mental health teams. People in suicidal crisis may call and request either a home-based visit or a centre-based visit, depending on their level of functioning and risk. |
 d. Technology-enabled crisis response | Responsive clinical mental health services delivered by community mental health teams. People in suicidal crisis may call and request either a home-based visit or a centre-based visit, depending on their level of functioning and risk. |
 e. Technology-enabled coordinated care | Technology-enabled coordinated care involves the use of online technology to facilitate delivery of multidisciplinary team-based care, in which medical and allied health professionals consider all relevant treatment options and collaboratively develop an individual treatment and care plan for each patient. |
 f. Post-discharge peer support | Post-discharge peer support is based on the Hospital to Home (H2H) program. This intervention involves peer workers (i.e. individuals with their own lived experience of mental illness and recovery) providing individualised practical and emotional support to patients discharged from psychiatric hospital care. |
 g. Post-attempt care PLUS Social connectedness PLUS Technology-enabled coordinated care | Interventions a, b, and e combined. |
 h. All mental health and suicide prevention interventions | Interventions a, b, c, d, e, and f combined. |
2. Social determinants | |
 i. Reducing childhood adversity by 20% | Reduces the rates at which children (aged 0–14 years) at low and moderate risk of developing a mental disorder transition to moderate and high levels of risk by 20% |
 j. Reducing childhood adversity by 50% | Reduces the rates at which children (aged 0–14 years) at low and moderate risk of developing a mental disorder transition to moderate and high levels of risk by 50% |
 k. Increasing youth employment by 20% | Increases the rate at which unemployed young people (aged 15–24 years) secure employment by 20% |
 l. Increasing youth employment by 50% | Increases the rate at which unemployed young people (aged 15–24 years) secure employment by 50% |
 m. Reducing (total) unemployment by 20% | Reduces the age-specific rates at which employed people (aged 15 years or more) become unemployed by 20%. |
 n. Reducing (total) unemployment by 50% | Reduces the age-specific rates at which employed people (aged 15 years or more) become unemployed by 50%. |
 o. Reducing domestic violence by 20% | Reduces domestic violence rates (incidents reported per year) among people aged 15 years and above by 20% |
 p. Reducing domestic violence by 50% | Reduces domestic violence rates (incidents reported per year) among people aged 15 years and above by 50% |
 q. Reducing homelessness by 20% | Reduces age-specific rates at which people in secure housing enter homelessness by 20% |
 r. Reducing homelessness by 50% | Reduces age-specific rates at which people in secure housing enter homelessness by 50% |
 s. Reducing childhood adversity by 50% PLUS increasing youth employment by 50% | Scenarios j and l combined. |
 t. All social determinants in combination | Scenarios j, l, n, p, and r combined. |
 u. Best combination of mental health and suicide prevention interventions PLUS best combination of social determinants | Scenarios g and s combined. |