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Table 1 Demographic, neuropsychological and fMRI task performance data

From: Reduced hippocampal activation during episodic encoding in middle-aged individuals at genetic risk of Alzheimer's Disease: a cross-sectional study

  ε3/ε3 (n = 17) ε3/ε4 (n = 23)
Age (years) 52.1 (6.8) 54.0 (5.6)
Age Range (years) 42 – 65 43 – 65
Education (years) 15.9 (2.1) 16.5 (2.6)
Gender Ratio: Female/Male 11/6 13/10
Handedness (% righthanded) 94% 96%
Homocysteine (μmol/l) 8.2 (1.8) 7.9 (1.5)
Blood Cholesterol (mg/dl) 1 215.8 (32.6) 204.9 (31.4)
Hematocrit (mL/dl) 40.0 (2.1) 40.6 (2.6)
Hemoglobin (g/dl) 13.8 (0.8) 13.9 (0.9)
Systolic Blood Pressure (mmHg) 131.5 (14.1) 132.6 (17.8)
WASI Verbal IQ 112.8 (8.6) 113.6 (10.5)
WASI Performance IQ 114.0 (8.4) 111.9 (8.5)
WAIS-III Working Memory 109.5 (14.5) 104.4 (13.5)
COWAT adjusted raw score 42.8 (10.9) 47.1 (10.0)
Boston Naming Test 56.6 (2.7) 56.6 (1.8)
RAVLT total recall trials 1–5 54.0 (5.2) 52.1 (7.5)
RAVLT short delay recall 11.6 (2.6) 11.0 (2.1)
RAVLT long delay recall 11.7 (2.3) 10.7 (2.9)
RAVLT recognition 14.1 (1.2) 14.0 (1.4)
Trail Making Test A (s) 27.1 (6.0) 27.0 (8.1)
Trail Making Test B (s) 55.4 (19.7) 67.0 (22.3)*
CES-D 4.2 (4.4) 4.1 (4.2)
Snodgrass Accuracy (%) 99.1 (1.2) 98.6 (2.2)
Snodgrass RT (sec) 0.81 (0.2) 0.89 (0.1)
Snodgrass Misses 0.3 (0.8) 0.7 (1.6)
  1. Data are presented as mean (SD). * denotes significant differences (p < 0.05) between the groups. WASI = Wechsler Abbreviated Scale of Intelligence, WAIS = Wechsler Adult Intelligence Scale, COWAT = Controlled Oral Word Fluency Test, RAVLT = Rey Auditory Verbal Learning Test, CES-D = Center for Epidemiological Studies – Depression Inventory. See text for further discussion of test measures. 1 = total non-fasting Blood Cholesterol