Generalised Anxiety Disorder (GAD)
Chronic, excessive worry across multiple life domains for at least 6 months, with three or more associated symptoms (restlessness, fatigue, concentration difficulty, irritability, muscle tension, sleep disturbance). Lifetime prevalence around 5%. CBT and SSRIs are first-line treatments.
Major Depressive Disorder (MDD)
DSM-5 diagnosis requiring 5+ depressive symptoms persisting most of the day, nearly every day, for at least 2 weeks – including either depressed mood or anhedonia. Lifetime prevalence around 15%. CBT, IPT, behavioural activation and SSRIs are first-line treatments.
Persistent Depressive Disorder
Chronic low mood lasting at least 2 years (1 year in children and adolescents) with at least two depressive symptoms. Previously called dysthymia. Often co-occurs with MDD (“double depression”).
Bipolar I disorder
Mood disorder defined by at least one manic episode – elevated or irritable mood plus increased energy, decreased need for sleep, grandiosity, pressured speech – lasting at least 7 days or requiring hospitalisation. Depressive episodes also typically occur. Mood stabiliser treatment lifelong.
Bipolar II disorder
Mood disorder with at least one major depressive episode and at least one hypomanic episode (similar to mania but less severe, lasting 4+ days, no psychosis or hospitalisation). Often misdiagnosed as MDD because hypomania may not be brought to clinical attention.
Schizoaffective disorder
Concurrent psychotic symptoms (hallucinations, delusions) and mood-disorder episodes (manic or depressive), with at least 2 weeks of psychotic symptoms in the absence of mood symptoms. Treatment combines antipsychotic and mood-stabiliser medication with psychological support.
Post-Traumatic Stress Disorder (PTSD)
Diagnosis after exposure to a traumatic event, with symptoms in 4 clusters: intrusion (flashbacks, nightmares), avoidance, negative cognitions and mood, and arousal / reactivity. Persisting more than 1 month. First-line treatments: trauma-focused CBT, EMDR, prolonged exposure, CPT.
Complex PTSD (CPTSD)
ICD-11 diagnosis following prolonged or repeated trauma (childhood abuse, intimate partner violence, captivity). Includes PTSD symptoms plus disturbances in self-organisation, affect regulation and relationships. Longer treatment course; phased trauma-focused approaches preferred.
Obsessive-Compulsive Disorder (OCD)
Recurrent intrusive obsessions (thoughts, images, urges) and compulsive behaviours / mental acts performed to neutralise distress. Lifetime prevalence ~2%. Exposure and response prevention (a CBT protocol) is the gold-standard treatment; SSRIs are also effective.
Panic Disorder
Recurrent unexpected panic attacks plus persistent concern about further attacks or behaviour change (avoidance). Often accompanied by agoraphobia. CBT (including interoceptive exposure) is highly effective; SSRIs also first-line.
Autism Spectrum Disorder (ASD)
Neurodevelopmental diagnosis with persistent deficits in social communication / interaction plus restricted, repetitive patterns of behaviour, interests or activities, present from early development. DSM-5 specifies severity levels 1, 2, 3 reflecting support needs.
Attention-Deficit/Hyperactivity Disorder (ADHD)
Neurodevelopmental diagnosis with inattention and/or hyperactivity-impulsivity persisting from childhood. DSM-5 presentations: predominantly inattentive, predominantly hyperactive-impulsive, combined. Lifetime prevalence ~5% children, ~2.5% adults. Treatment combines stimulant medication (prescribed by paediatrician or psychiatrist) and psychological support.
Dissociation
Disruption in the normally integrated functions of consciousness, memory, identity or perception. Ranges from minor everyday phenomena (highway hypnosis) to clinical dissociative disorders. Common in trauma; affects how trauma therapy is paced.
Adjustment disorder
Emotional or behavioural symptoms in response to an identifiable stressor, within 3 months of onset, out of proportion to the stressor. Typically resolves within 6 months once the stressor or its consequences are addressed. Brief therapy is usually sufficient.
Perinatal anxiety + depression
Anxiety or depressive symptoms during pregnancy or up to a year postpartum. Affects ~1 in 5 mothers. Screening recommended at antenatal visits using the Edinburgh Postnatal Depression Scale (EPDS). PANDA (1300 726 306) provides specialist support.
Eating disorders – AN, BN, BED, ARFID
Anorexia Nervosa (restriction, low weight, body image disturbance), Bulimia Nervosa (binge-purge cycles), Binge Eating Disorder (recurrent binges without compensatory behaviours), Avoidant / Restrictive Food Intake Disorder (food avoidance without body image). Eating Disorder Plan unlocks 40 psychology sessions / 12 months.
Source: butterfly.org.au