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Table 2 Baseline characteristics of progressors vs. non-progressors

From: The Alzheimer’s Prevention Initiative Composite Cognitive Test: a practical measure for tracking cognitive decline in preclinical Alzheimer’s disease

CharacteristicNon-progressors (N = 989)Progressors (N = 868)Overall (N = 1857)p value
Age
 Mean (SD)74.5 (7.4)77.5 (6.8)75.9 (7.3)< 0.0001
Gender
 Male24.2%29.3%26.5%< 0.05
 Female75.8%70.7%73.5% 
Race
 Native American, Indian0.3%0.1%0.2%< 0.05*
 Black, Negro, African-American21.9%16.6%19.4% 
 White77.6%82.7%80.0% 
 Asian or Pacific Island0.1%0.5%0.3% 
 Missing0.1%0.1%0.1% 
Education (years)
 Mean (SD)15.9 (3.8)16.3 (3.7)16.1 (3.8)< 0.05
APOE4 carrier status
 Carrier17.0%23.3%19.9%< .0001
 Non-carrier62.0%69.9%65.7% 
 Missing21.0%6.8%14.4% 
Baseline MMSE
 Mean (SD)28.9 (1.3)28.3 (1.7)28.6 (1.6)< 0.0001
Baseline APCC
 Mean (SD)65.5 (7.1)61.6 (7.1)63.7 (7.4)< 0.0001
  1. *p value for race is White vs. other