Mental disorders are common in the elderly, including depression, suicide, anxiety, and dementia. Diagnosing these disorders can be difficult, as symptoms may be caused by physical health problems or medications. Approximately 7 million older adults suffer from depression, which is not normal aging, and those with depression often attempt suicide successfully. Factors that contribute to depression include altered sleep, poor nutrition, pain, illness, loss of a spouse, isolation, substance abuse, and life changes like injury. Physicians use charts to determine if memory loss is normal aging or a sign of dementia by considering independence, concern of family members, impairment of recent memory and skills.