. Author manuscript; available in PMC: 2012 Mar 1.

Published in final edited form as: Arch Neurol. 2011 Mar;68(3):343–350. doi: 10.1001/archneurol.2010.375

Table 3.

Internal consistency of SIST-M items in the legacy data replication cohort (n=200).

CDR Domain	Cronbach’s coefficient alpha	Range of item-total correlations
Memory	0.89	0.47 – 0.73
Orientation	0.87	0.35 – 0.81
Judgment and Problem-solving	0.90	0.36 – 0.81
Community Affairs	0.87	0.64 – 0.74
Home and Hobbies^*	0.58	−0.16 – 0.53
- Home^†	0.67	0.15 – 0.50
- Hobbies^†	0.65	0.04 – 0.66
Personal Care^‡	N/A	N/A

All 15 Home and Hobbies items were assessed together.

^†

The 6 Home and 9 Hobbies items were assessed separately.

^‡

Reliability coefficients were not applicable for Personal Care, as only three items are used to rate this domain in the SIST-M, and nearly all participants received a score of 0 in this domain.