Depression is a condition that is getting more widespread and doesn't appear to want to give any relief. According to the World Health Organization (WHO), there are currently 322 million people suffering from depression globally, an increase of 18% since ten years ago. Clinical depression, also referred to as major depressive illness, is characterized by a constant sense of melancholy, loss of interest, cognitive decline, and issues with sleep and appetite. It is an expensive, chronic disease that frequently progresses, leaving its victims miserable and disabled.
What brings on depression?
Sadly, we are unable to answer. The traits and situations that raise the likelihood of depression, however, have been the subject of several research.
The death of a loved one or the diagnosis of a major illness are two examples of risk factors that are obvious to anyone. There are other additional, less well-known, but crucial risk factors. These include comorbidities, genetic and neurological factors, personal variables, sociodemographic factors, and other factors.
Sociodemographic factors: depression affects twice as many women as men.
The sociodemographic risk factor for depression that is perhaps most constant and well-known is gender. Post-pubescent women are twice as likely as men to develop depression, regardless of the nation or culture.
Other sociodemographic risk variables for depression, such as age, marital status, level of education, and race, have been discovered by researchers. White people, young adults, single adults, separated or divorced couples, and people with lower educational levels are more likely to experience depression. Depression has also been linked to higher rates of poverty, unemployment, and residing in metropolitan areas.
Genetic influences: depression may run in families
There is a threefold increased risk of developing the condition in close relatives of people with depression. According to studies, genetic factors account for 26–42% of variability in depression. Additionally, there is some evidence to suggest that recurrent and early-onset depression is more likely to be inherited. However, due to the disease's extreme heterogeneity, no one gene or group of genes has been consistently linked to depression or to parental transmission.
Neurological causes: hyperactivity of the amygdala
Adults with depression have specific brain regions where aberrant neural activity has been seen. The gray matter volumes of the hippocampus, amygdala, anterior cingulate cortex, and dorsolateral prefrontal cortex specifically exhibit structural abnormalities.
Neural activity also alters when we experience depression. Amygdala and limbic circuits, which are subcortical areas involved in emotion processing, are more active, whereas the cognitive control parts of the brain are less active.
Not only adults experience this. Even before the start of a depressive episode, the same abnormalities in brain structure and function have been found in children of depressed parents. Because of this, scientists think that these kids are more susceptible to this condition.
Personal factors: introversion and excessive self-criticism
Personal characteristics that increase the likelihood of having a depressive episode include a propensity for negative emotions (such as fear, anger, sadness, and anxiety), as well as mood swings and unfavorable thoughts, known as neuroticism.
Depression is also more prevalent in introverts. These are people who favor quiet activities and are more concerned with their own feelings, thoughts, and moods than they are with finding external stimulation.
Additionally, studies show a connection between sadness and a lack of conscientiousness. This is a trait of aimless, casual, slothful, careless, undisciplined, and weak-willed people.
Excessive self-criticism (guilt and failure feelings resulting from irrationally high self-expectations) and reliance/sociotropy (helplessness and abandonment fears resulting from a high emotional dependence on others) are other factors that predict depression.
Negative attributional style is another mentality that encourages depression. This is the propensity to pin bad things on stable, internal, and external factors. For instance, "I didn't get the job since I've always been useless."
Similar effects are shown when a person engages in mental rumination, which involves repeatedly thinking about depressing or unpleasant thoughts and focusing on their ramifications, causes, and personal significance.
Finally, a higher risk of depression is associated with a lack in personal resources, such as social skills, suitable problem-solving techniques, and coping mechanisms under pressure.
Adverse circumstances
The contribution of stressful life events to the onset of depression has been studied for more than 40 years. Between 50 and 80 percent of patients with depression reported experiencing a traumatic or significant life event before the condition manifested itself, depending on the type of sample used for the study.
According to conservative estimates, folks who have depression are 2.5 times more likely than those who don't to have gone through a traumatic life event before it started. Life-threatening health issues, separation and bereavement, being exposed to violence, losing a career, and financial instability are examples of typical stressful life experiences.
Cataclysmic occurrences or phenomena that have a significant impact on a lot of people all at once are also significant. These occurrences, like the Covid pandemic, are frequently out of anyone's or any group's control and are seen as being worrisome for everyone.
Childhood trauma increases our likelihood of developing depression as we get older. These consist of criminality, marital violence, parental mental illness, psychological neglect (or abandonment), and physical. Depression is more than twice as likely to occur in people who have experienced childhood trauma, particularly bullying and emotional neglect.
Comorbidity
The fact that depression frequently coexists with other mental illnesses, particularly anxiety disorders, substance use disorders, eating disorders, and sleep issues, is one of depression's most startling characteristics.
Furthermore, any serious or persistent medical problem may increase your risk of developing depression. Acute myocardial infarction, asthma, cancers, cardiac arrhythmia, chronic coronary syndrome, chronic obstructive pulmonary disease, congestive heart failure, some neurological conditions like Alzheimer's or epilepsy, thyroid issues, diabetes, obesity, some digestive system pathologies, hypertension, osteoarthritis, osteoporosis, renal failure, stroke, fibromyalgia, and other conditions have all been found to be associated with depression.
We can better comprehend depression, prevent the start of the illness, and possibly even slow down its seemingly unstoppable progression if we are aware of all these risk factors.
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