Depression

Image
Man sitting on couch with hand over face

Feeling sad or low after an upsetting or stressful event is normal. However, if these feelings do not go away, last several weeks or month, and do not improve even when good things happen then this may be depression.

Depression (also called major depressive disorder) is a common mental health condition characterised by ongoing sadness or low mood. A person with depression may lose interest in things they used to enjoy, have low energy, be irritable, and have difficulty concentrating. They may also experience changes in sleep, appetite and weight. These symptoms can have a negative impact on their relationships, performance at work/ school, and overall daily functioning. Depression can cause people to feel hopeless about the future, have low self-esteem, feel worthless or like they are a burden on others. These feelings can lead to thoughts of self-harm and suicide. 

Depression is common and can affect anyone. The exact cause is unknown but there is a genetic component meaning it can be inherited. Other risk factors include experiencing a stressful or traumatic event and social isolation.

The good news is that depression is treatable. A mix of psychological therapy and medication can be effective for many who suffer from depression.

Common symptoms
  • Feeling sad
  • Feeling low or hopeless
  • Loss of interest in things you used to enjoy
  • Difficulty concentrating
  • Changes in sleep - sleeping too much or too little
  • Changes in appetite - increase or decrease in appetite
  • Changes in weight - losing or gaining weight
  • Thoughts of harming yourself
  • Thoughts of suicide or death
  • Irritability
  • Feelings of worthlessness or guilt
  • Reduced sex drive
  • Fatigue and low energy
  • Restlessness
How common is in the general population
Depression is a common mental health condition. It is estimated that 2-6% of the general population experience depression at some point in their life.
Gender differences
Depression is more common in women than in men.
Onset
Depression can begin at any stage of life but most often begins in early adulthood. The average age of onset is around 32 years old, and depression is most common in those 25 to 45 years old.
Typical Course
Depression tends to be episodic and will usually have periods of depression followed by periods of recovery.
Common Comorbid (concurrent) Conditions
Anxiety disorders, trauma, substance use disorders, post-traumatic stress disorder (PTSD), obsessive-compulsive disorder (OCD).
Common treatments

There are many effective treatments for depression. Depression is commonly treated with medication, psychological therapy, or a combination of these. The type of treatment will depend on the pattern and severity of depressive episodes and other individual factors.

Medication: 

Antidepressants can be effective in the treatment of depression. Ideally these medications are used in combination with talk therapy. You may need to trial several types and different doses of medication with your doctor to find one that is effective for you.

Psychological Therapy: 

Various forms of psychological therapy have been developed to treat depression. Cognitive behavioural therapy (CBT) is a structured form of talk therapy commonly used to treat depression. CBT combines cognitive and behaviour therapies to explore how our beliefs, thoughts, and actions impact each other. CBT is based on the idea that our feelings are influenced by our thoughts and behaviours. Your therapist will help you identify negative and maladaptive thoughts and beliefs and replace these with more adaptive positive ones, identify factors contributing to your depression, find coping strategies, change behaviour, and improve overall wellbeing and mood. 

Other Treatments: 

Other medical treatments have been approved to treat depression which does not improve in response to medication or psychological therapy, these include transcranial magnetic stimulation (TMS) and electroconvulsive therapy (ECT). TMS involves sending short magnetic pulses into brain areas involved in mood regulation in order to stimulate nerve cells. ECT involves passing electrical currents through the brain to impact brain function and neurotransmitter function.