Table 3.

Complete Case Distribution of Baseline Cognitive and Functional Measures and Their Severity Among the ADMDC Probable AD Cohort, Houston, Texas, 1990 to 2011 (N = 871).

	Mean (SD)	Range	Mild n (%)	Moderate, n (%)	Severe, n (%)
MMSE	20.7 (5.9)	0-30	564 (64.8)	262 (30.1)	45 (5.2)
CDR-SB	5.9 (3.7)	0.5-18	728 (83.6)	123 (14.1)	20 (2.3)
ADAS-Cog	23.6 (12.5)	0-68	228 (26.2)	638 (73.3)	5 (6)

Abbreviations: AD, Alzheimer’s disease; ADAS-Cog, Alzheimer’s Disease Assessment Scale–Cognitive; ADMDC, Alzheimer’s Disease and Memory Disorders Center; CDR-SB, Clinical Dementia Rating Scale–Sum of Boxes; MMSE: Mini-Mental State Examination; SD, standard deviation.