It is important to note, however, that these tests are limited, and mental health professionals generally diagnose depression based on symptoms and other criteria. Diagnosing Depression in the Elderly Because of the complex relationship between depression, drug interactions, and serious physical illness in the elderly, an accurate diagnosis in this group is important but not always straightforward. Often they are unable or unwilling to express their feelings or are even unaware that they are depressed. Their symptoms are often ignored or confused with other ailments common in the elderly, including Parkinson's or Alzheimer's disease, dementia, thyroid disorders, arthritis, stroke, cancer, heart disease, and other chronic conditions. Depression may even be a predictor of Alzheimer's disease or an impending physical illness before the symptoms of the disease itself become evident.
Depression is also a side effect of many drugs that are commonly prescribed for the elderly.
It is often very difficult, then, to determine if the patient's depression is a psychologic reaction to the illness, caused by the disease itself, or completely independent from the medical condition. Both physical and emotional conditions should be considered in making a diagnosis in older people. N Engl J Med. The reports are distinguished from other information sources available to patients and health care consumers by their quality, detail of information, and currency. These reports are not intended as a substitute for medical professional help or advice but are to be used only as an aid in understanding current medical knowledge.