TABLE D.2.

Symptom probability across the four classes in ADNI study.

Symptoms probability ADNI	No symptoms	Apathy	Depression	Combined apathy/depression
	Class 1	Class 2	Class 3	Class 4
Cry at times	0.00	0.03	0.41	0.39
Say, or act like he/she is depressed	0.07	0.00	0.86	0.86
Put him/herself down or say that feels like a failure	0.01	0.00	0.37	0.40
Say that he/she is a bad person or deserves to be punished?	0.00	0.00	0.05	0.04
Seem very discourages or say that has no future?	0.00	0.00	0.54	0.37
Is a burden to the family or that the family would be better off without him	0.01	0.02	0.39	0.34
Talk about wanting to die or about killing himself	0.00	0.00	0.05	0.09
Show other signs of depression or sadness?	0.01	0.01	0.14	0.19
Lost interest in the world around	0.03	0.89	0.06	0.98
Fail to start conversation	0.00	0.76	0.07	0.78
Less affectionate or lacking in emotions	0.00	0.29	0.00	0.36
Contribute less to household chores	0.01	0.74	0.00	0.77
Less Interested in the activities and plans of others	0.00	0.64	0.00	0.85
Lost interest in friends and family members	0.00	0.40	0.00	0.49
Less enthusiastic about usual interests	0.01	0.69	0.13	0.92
Other signs that doesn't care about doing new things	0.00	0.14	0.00	0.24

Abbreviation: ADNI, Alzheimer's Disease Neuroimaging Initiative.