Table 4.

Comparison of results of USC ADRC and telephone survey-based classification in three categories. Assumption 1: AAMI (age-associated memory impairment) considered normal.

		Gold Standard Classification
		AD or Mixed Dementia	Cognitive Impairment	Normal	All
Classification by Telephone Assessment	Dementia	5	0	0	5
	Cognitive Impairment	0	2	2	4
	No or Minimal Impairment	1	2	26	29
	All	6	4	28	38

Telephone Assessment

Sensitivity for dementia 5/6 = 0.83 (95% confidence interval 0.35, 0.99)

Sensitivity for cognitive impairment 2/4 = 0.50 (95% confidence interval 0.07, 0.93)

Specificity for normal 26/28 = 0.93 (95% confidence interval 0.77, 0.99)

Kappa 0.67 (95% confidence interval 0.45, 0.89)