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Table 1 Descriptive statistics for predictor variables by APOE genotype

From: The association of APOE genotype and cognitive decline in interaction with risk factors in a 65–69 year old community sample

    *E4-/*E4- *E4+/*E4- *E4+/*E4+  
    (n = 1473) (n = 510) (n = 38)  
   n Freq (%) Freq (%) Freq (%) p
Age 60–62 1045 749 (71.7%) 282 (27.0%) 14 (1.3%) 0.040
  63–64 976 724 (74.2%) 228 (23.4%) 24 (2.5%)  
Gender Male 1049 764 (72.8%) 267 (25.5%) 18 (1.7%) 0.837
  Female 972 709 (72.9%) 243 (25.0%) 20 (2.1%)  
Education 0–12 years 632 452 (71.5%) 167 (26.4%) 13 (2.1%) 0.907
  13 years 426 313 (73.5%) 107 (25.1%) 6 (1.4%)  
  14–15 years 207 156 (75.4%) 48 (23.2%) 3 (1.4%)  
  16+ years 756 552 (73.0%) 188 (24.9%) 16 (2.1%)  
Head injury Yes 193 142 (73.6%) 47 (24.4%) 4 (2.1%) 0.941
  No 1828 1331 (72.8%) 463 (25.3%) 34 (1.9%)  
Problem drinking Yes 468 349 (74.6%) 110 (23.5%) 9 (1.9%) 0.617
  No 1553 1124 (72.4%) 400 (25.8%) 29 (1.9%)  
Premorbid intelligence Low 625 458 (73.3%) 159 (25.4%) 8 (1.3%) 0.599
(STW) Medium 718 514 (71.6%) 190 (26.5%) 14 (1.9%)  
  High 654 481 (73.5%) 158 (24.2%) 15 (2.3%)  
Stroke or hypertension Yes 1118 813 (72.7%) 285 (25.5%) 20 (1.8%) 0.911
  No 903 660 (73.1%) 225 (24.9%) 18 (2.0%)  
Stroke history Yes 80 59 (73.8%) 19 (23.8%) 2 (2.5%) 0.882
  No 1941 1414 (72.8%) 491 (25.3%) 36 (1.9%)  
Current hypertension Yes 1212 882 (72.7%) 309 (25.5%) 21 (1.7%) 0.804
  No 809 591 (73.1%) 201 (24.8%) 17 (2.1%)