Mental Health Risk Assessment in Adolescents

Overview

• Mental health risk assessment in adolescents is a core competency for paediatricians and forms an integral component of the broader adolescent health encounter, including consultations related to sexual health, contraception, and STI screening.
• Adolescence represents a period of heightened vulnerability for the emergence of mental health conditions, and systematic risk assessment enables early identification, appropriate intervention, and coordination of care.
• The RACP Paediatrics candidate must be fluent in the framework for psychosocial assessment, recognition of specific risk domains, validated screening tools, principles of confidentiality, and safe clinical management in both outpatient and emergency settings.

Epidemiology and Aetiology

• Mental health disorders affect approximately one in seven (14%) of adolescents globally, with Australian data (Young Minds Matter survey) indicating similar prevalence.
• The peak onset of many major mental health conditions occurs during adolescence and early adulthood, including depressive disorders, anxiety disorders, eating disorders, substance use disorders, and psychotic illnesses.

• Contributing aetiological factors are multifactorial: genetic predisposition, early adverse childhood experiences, peer victimisation, family dysfunction, socioeconomic disadvantage, substance use, and reduced access to mental health services.
• Minority stress, chronic psychosocial stress attributable to stigma, discrimination, and internalised shame, is a particularly significant driver of mental health risk in LGBTQIA+ youth.
• Research consistently demonstrates higher rates of mental health risk in sexual minority adolescent populations, although it remains difficult to isolate the contribution of sexual minority status itself from associated social and contextual adversity. not all sexual minority adolescents are equally affected; solid support systems and affirming environments are strongly protective.

Pathophysiology

• Adolescent brain development is characterised by heightened limbic system reactivity (emotion, reward-seeking) relative to the still-maturing prefrontal cortex (impulse control, executive function, long-range planning).
• This neurobiological imbalance predisposes adolescents to impulsive decision-making, risk-taking behaviour, and emotional dysregulation, and underpins vulnerability to substance use disorders and mood instability.
• The stress-diathesis model conceptualises mental illness onset: a biological vulnerability (diathesis) is unmasked by psychosocial stressors including identity formation challenges, academic pressure, relationship breakdowns, and exposure to online harm.
• Neurobiological sensitisation through repeated adversity, including childhood maltreatment, can dysregulate hypothalamic-pituitary-adrenal (HPA) axis function, contributing to persistent anxiety and depressive states.

Clinical Features and Age-Specific Presentations

Early Adolescence (11-14 years)

• Emotional lability; somatic complaints (headaches, abdominal pain) as common presentations of mood disorders
• School refusal and avoidance
• Emerging awareness of sexual orientation or gender identity; identity formation challenges
• Self-harm may present as superficial cutting and is often not disclosed spontaneously

Mid-Adolescence (14-16 years)

• More classical depressive presentations: low mood, anhedonia, social withdrawal, sleep and appetite disturbance
• Increased risk-taking: substance experimentation, unsafe sexual behaviour
• Eating disorder onset most common in this period
• Suicidal ideation may be more organised; requires direct and structured assessment

Late Adolescence (17-19 years)

• First-episode psychosis onset most common
• Substance use disorders may consolidate
• Transition stress (leaving school, leaving paediatric services) is a recognised vulnerability period
• Capacity for self-report and insight approaches adult levels

Psychosocial History Framework: HEEADSSS

• The HEEADSSS framework (endorsed by the Royal Children's Hospital Melbourne) provides a structured approach to adolescent psychosocial history-taking.
• Clinicians should progress from neutral to more sensitive topics, using a third-person or graduated approach for delicate subjects (e.g. "Are there drugs at your school?
• Are any of your friends involved?
• Have you ever tried them?") to reduce shame and defensiveness.

• The sexuality domain should include assessment of unsafe sexual practices, known or suspected pregnancy, and history of STI testing including HIV testing, with education and referral as indicated.
• Assessment of victimisation in home, school, and community settings is essential, particularly for sexual minority youth.

Investigations

Standardised Screening Tools

These tools supplement, not replace, clinical assessment; they are most useful for triaging severity and monitoring treatment response.

Physical and Laboratory Investigations

Mental health risk assessment is primarily clinical. Relevant investigations may include:

• Thyroid function tests (hypothyroidism mimicking depression)
• Full blood count (anaemia in eating disorders or self-neglect)
• HbA1c, blood glucose (in young people with T1DM, depression significantly impairs glycaemic management)
• Urine toxicology where substance use is suspected and clinically relevant
• Pregnancy testing in adolescent females presenting with mood change or self-harm, given implications for psychotropic medication safety, a high proportion of adolescent pregnancies are unplanned and psychotropic drugs cross the placenta

Suicide Risk Assessment

• Suicide is the leading cause of death in Australian young people aged 15-24 years.
• Every adolescent mental health assessment must include structured, non-avoidant enquiry about suicidal ideation and self-harm.
• The C-SSRS and ASQ are validated instruments for this purpose.

Risk Stratification

Key Risk Factors for Adolescent Suicide

• Previous suicide attempt (single strongest predictor)
• Active psychiatric diagnosis (depression, psychosis, substance use disorder)
• Family history of suicide or mental illness
• Access to lethal means (medications, firearms)
• Recent significant loss (bereavement, relationship breakdown, bullying/victimisation)
• Sexual or gender minority identity
• Exposure to peer suicidal behaviour (contagion/clustering effect)
• Child maltreatment or trauma history
• Social isolation and low perceived support
• Recent discharge from inpatient psychiatric care
• Sensation-seeking as a personality trait

Protective Factors

• Reasons for living (family, friends, future goals)
• Problem-solving capacity
• Engagement with treatment
• Social connectedness and peer support; affirming family and community environment
• Religious or cultural beliefs against suicide
• Access to mental health services and supportive community organisations (e.g. GSA, GLSEN for LGBTQIA+ youth)

Confidentiality, Consent, and the Fraser/Gillick Framework

• In Australia, the principle of competent minor consent (analogous to the UK Gillick/Fraser guidelines) permits adolescents who demonstrate sufficient maturity and understanding to consent to their own healthcare, including mental health assessment and treatment, without parental involvement.
• All states allow minors to seek treatment for sexually transmitted infections; most allow treatment for substance use disorders; some jurisdictions allow adolescents to seek outpatient psychiatric care independently.
• The clinician should be familiar with jurisdiction-specific statutes.

Clinicians must balance:

1. Confidentiality: fundamental to engaging adolescents; limits must be explained at the outset of each consultation
2. Mandatory reporting obligations: child abuse, neglect, risk of significant harm (jurisdiction-specific)
3. Duty of care: overrides confidentiality when there is imminent risk of serious harm to self or others

• Where possible, support the young person to disclose to a parent themselves, with clinician support, rather than a unilateral breach of confidence.
• Involuntary commitment does not, of itself, authorise involuntary medication except in narrowly defined safety emergencies.

Management

Stepped Care Approach

Safety Planning

All adolescents with any level of suicidal ideation or self-harm should receive a collaboratively developed safety plan including:

• Personal warning signs
• Internal coping strategies
• Social contacts and distraction strategies
• Trusted adults they can approach
• Professional contacts (GP, CAMHS, Lifeline 13 11 14, Kids Helpline 1800 55 1800)
• Means restriction (removal or securing of medications and other lethal means)

The ED environment should be modified to ensure safety: free from items usable for self-harm (sharps, cords, IV poles), allow continuous observation while maintaining privacy, minimise sensory overstimulation.

Pharmacological Management

• SSRIs are first-line pharmacological treatment for moderate-to-severe adolescent depression and anxiety disorders (under specialist guidance)
• Black box warning: SSRIs in adolescents carry a regulatory warning for activation and emergent suicidality; structured monitoring is required at 1-2 weeks after initiation and with each dose change
• Document menstrual history, contraceptive use, and pregnancy status before initiating any psychotropic medication in adolescent females
• Avoid routine benzodiazepine use for anxiety in adolescents (dependence risk)
• In adolescents with comorbid chronic illness (T1DM, CF, SCA), consider medication interactions and disease-specific contraindications; multidisciplinary input is essential
  • In SCA: combined oral contraceptives are not recommended (vaso-occlusive risk); progesterone-only or barrier methods preferred, relevant when mood stabilisers or antipsychotics are co-prescribed and contraception is being addressed
  • In CF: liver disease contraindicates combined OCP; bone health concerns with depot medroxyprogesterone acetate (Depo-Provera) are relevant if psychotropic-related weight changes also affect bone density
  • In T1DM: depression impairs glycaemic management; pregnancy in adolescent females with T1DM carries significantly elevated maternal and fetal risk, contraception counselling is integral to mental health management in this group

Complications of Unrecognised or Untreated Mental Illness

Prognosis and Follow-up

• Outcomes are significantly improved with early identification and engagement in treatment.
• Adolescent depression has a high recurrence rate (approximately 60-70% will experience a further episode within 5 years); early and sustained treatment reduces chronicity.

Follow-up principles:

• Structured review of safety plan and suicidality at every encounter
• Monitor treatment response using validated outcome measures (PHQ-A, K10)
• Coordinate care between paediatrician, GP, CAMHS, school counsellor, and family
• Plan transition from paediatric to adult mental health services proactively, not at crisis point
• Re-engage family as clinically appropriate and as the young person permits
• For sexual minority youth, ensure access to affirming support organisations and resources

Indications for Escalation

Urgent CAMHS Referral (Same Day to 48 Hours)

• Active suicidal ideation with plan or recent attempt
• First presentation of psychotic symptoms
• Moderate-to-severe eating disorder with medical instability
• Self-harm with high lethality or escalating frequency
• Acute substance intoxication with psychiatric features
• Significant family safety concerns (family violence, abuse)

Inpatient Admission

• High or imminent suicide risk, especially with impaired impulse control or psychosis
• Refusal of outpatient treatment with ongoing high risk
• Medical instability secondary to eating disorder or self-harm
• Inadequate home environment for safe community management
• Diagnostic clarification required in complex presentations

Emergency Department

• Active suicidal attempt or overdose
• Acute psychosis with agitation or aggression
• Immediate risk of harm to self or others
• Medical emergency secondary to psychiatric illness (severe malnutrition, overdose)

• The paediatrician plays a pivotal role in recognising mental health risk during routine encounters, including contraception and sexual health consultations.
• Embedding systematic psychosocial screening (HEEADSSS) into all adolescent health encounters, maintaining a non-judgmental approach, understanding confidentiality obligations and their limits, and facilitating timely access to appropriate mental health support are fundamental standards of adolescent paediatric practice.