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Table 1 Comparison of the basic characteristics between the control and Alzheimer’s disease (AD) group

From: Sleep duration, genetic susceptibility, and Alzheimer's disease: a longitudinal UK Biobank-based study

Characteristics Control group AD group P value
Age (Median, IQR) 58 (50,63) 66 (62,68)  < 0.001
TDI (Median, IQR) -2.2 (-3.7,0.5) -2 (-3.6,1.1) 0.037
Gender (n, %)     < 0.001
  Female 261,396 (54.2) 443 (48.2)  
  Male 221,192 (45.8) 476 (51.8)  
Ethnicity (n, %)    0.003
  White people 437,884 (91) 849 (92.4)  
  Mixed people 17,807 (3.7) 43 (4.7)  
  Other people 25,270 (5.3) 27 (2.9)  
Education (n, %)     < 0.001
 College/University 157,154 (32.9) 172 (19.3)  
 Other 320,081 (67.1) 718 (80.7)  
Smoking (n, %)     < 0.001
 Never 263,316 (54.8) 431 (47.4)  
 Previous 167,034 (34.7) 388 (42.7)  
 Current 50,485 (10.5) 90 (9.9)  
Alcohol (n, %)     < 0.001
 Never 20,987 (4.4) 73 (8)  
 Previous 17,105 (3.5) 74 (8.1)  
 Current 443,980 (92.1) 768 (83.9)  
Myocardial infarction (n, %)
 No 462,906 (95.9) 803 (87.4)  < 0.001
 Yes 19,682 (4.1) 116 (12.6)  
Stroke (n, %)     < 0.001
 No 470,248 (97.4) 817 (88.9)  
 Yes 12,340 (2.6) 102 (11.1)  
Diabetes (n, %)     < 0.001
 No 477,875 (99) 885 (96.3)  
 Yes 4713 (1) 34 (3.7)  
Hypertension (n, %)     < 0.001
 No 334,628 (69.3) 393 (42.8)  
 Yes 147,960 (30.7) 526 (57.2)  
Sleep duration (Median, IQR) 7 (7,8) 7 (7,8)  < 0.001