Table 1 Characteristics of the study population
From: Genetic polymorphisms of nerve growth factor receptor (NGFR) and the risk of Alzheimer's disease
| Â | Alzheimer's disease (n = 264) | Controls (n = 389) |
|---|---|---|
|  | Mean ± SD | |
Age (years) | 79 ± 7 | 73 ± 6 |
| Â | n (%) | |
Female | 172 (65%) | 207 (53%) |
Education | Â | Â |
   Elementary | 132 (50%) | 40 (10%) |
   High school | 93 (35%) | 160 (41%) |
   College and above | 39 (15%) | 189 (49%) |
Cigarette smoking | Â | Â |
   Never | 204 (77%) | 321 (83%) |
   Former | 42 (16%) | 56 (14%) |
   Current | 18 (7%) | 12 (3%) |
Alcohol consumption | Â | Â |
   Never | 230 (87%) | 349 (90%) |
   Former | 24 (9%) | 13 (3%) |
   Current | 10 (4%) | 27 (7%) |
Type 2 diabetes | 48 (18%) | 51 (13%) |
Hypertension | 103 (39%) | 205 (53%) |
Hyperlipidemia | 48 (18%) | 115 (30%) |
ApoE ε4 carriers | 107 (40%) | 55 (14%) |