SYMPTOMS AND PATTERNS

Depression symptoms can vary from mild to severe and can include:

Feeling sad or having a depressed mood.

Loss of interest or pleasure in activities once enjoyed.

Changes in appetite — weight loss or gain unrelated to dieting.

Trouble sleeping or sleeping too much.

Loss of energy or increased fatigue.

Increase in purposeless physical activity (e.g., inability to sit still, pacing, handwringing) or slowed movements or speech (these actions must be severe enough to be observable by others).

Feeling worthless or guilty.

Difficulty thinking, concentrating or making decisions.

Thoughts of death or suicide.

Symptoms must last at least two weeks and must represent a change in your previous level of functioning for a diagnosis of depression.

Also, medical conditions (e.g., thyroid problems, a brain tumor or vitamin deficiency) can mimic symptoms of depression so it is important to rule out general medical causes.

Depression affects an estimated one in 15 adults (6.7%) in any given year. And one in six people (16.6%) will experience depression at some time in their life. Depression can occur at any time, but on average, first appears during the late teens to mid-20s. Women are more likely than men to experience depression. Some studies show that one-third of women will experience a major depressive episode in their lifetime. There is a high degree of heritability (approximately 40%) when first-degree relatives (parents/children/siblings) have depression.