Table 1.

Correlation of the questions of the Yesavage scale with psychopathology and associated neurotransmitters.

	Symptom	Neurotransmitter
Are you basically satisfied with your life?	Hopelessness	SER
Have you given up many of your activities and interests?	Anergy	NA
Do you feel that your life is empty?	Hopelessness	SER
Are you often bored?	Anhedonia	DA
Are you hopeful for the future?	Hopelessness	SER
Are you troubled by thoughts you cannot get out of your head?	Rumination	SER
Are you often in good spirits?	General mood	SER
Are you afraid that something bad is happening to you?	Anxiety	NA
Do you feel happy most of the time?	Anhedonia	DA
Do you often feel helpless?	Loneliness	SER
Are you often restless and uneasy?	Restlessness	NA
Do you prefer to stay at home, rather than going out and doing new things?	Apathy	NA
Are you frequently worried about the future?	Rumination	SER
Do you feel you have more problems with memory than most?	Concentration	DA
Do you think it is wonderful to be alive now?	Anhedonia	DA
Do you often feel discouraged and melancholic?	Sadness	SER
Do you feel pretty worthless the way you are now?	Self esteem	SER
Are you very worried about the past?	Rumination	SER
Do you find life very stimulating?	Anhedonia	DA
Is it difficult for you to start new projects?	Anergy	NA
Do you feel full of energy?	Anergy	NA
Do you feel that your situation is hopeless?	Hopelessness	SER
Do you think that most people are better off than you are?	Hopelessness	SER
Are you often worried about little things?	Rumination	SER
Do you often feel like crying?	Lability	SER
Do you have trouble concentrating?	Concentration	DA
Do you feel better in the morning when you wake up?	Melancholic pole	SER
Do you prefer to avoid social gatherings?	Social phobia	SER
Is it easy for you to make decisions?	Doubt	SER
Is your mind as sharp as it used to be?	Concentration	DA