Depression in the elderly is usually the result of being diagnosed with an illness or a disability. Many elders suffer from lost of love ones and are not able to overcome it so easily. They become used to their life partners that the everyday friendship is a necessity.
There are many risk factors that can clue family members in on how to detect any sudden changes in their love ones:
Certain medicines or combination of medicines
Other illnesses
Living alone, social isolation
Recent bereavement
Presence of chronic or severe pain
Damage to body image (from amputation, cancer surgery, or heart attack)
Fear of death
Previous history of depression
Family history of major depressive disorder
Past suicide attempt(s)
Substance abuse
There are many treatments as well for depression. This is not a disease that should be ignored. Many people can be treated with Antidepressants, Psychotherapy, and Electroconvulsion therapy.
REMEMBER DEPRESSION DOES NOT HAVE TO TAKE OVER YOU LOVE ONES LIFE.
http://www.healthyplace.com/depression/elderly/depression-in-elderly/menu-id-68/