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Table 5 General characteristics of the participants

From: Patterns of cognitive function in middle-aged and elderly Chinese adults—findings from the EMCOA study

  Men Women p value
Number, n (%) 2247 (49.1%) 2326 (50.9%)
Sociodemographic characteristics
 Age (years), median (IQR) 59 (55, 62) 58 (54, 62) 0.045*
 Education (years), median (IQR) 12 (9, 15) 9 (9, 12) < 0.001**
 Occupation, n (%)    < 0.001**
  Manual work 452 (20.1%) 723 (31.1%)  
  White-collar work 921 (41.0%) 453 (19.5%)  
 Monthly income, n (%)   < 0.001**
  Low 607 (27.0%) 868 (37.3%)  
  Medium 734 (32.7%) 722 (31.1%)  
  High 906 (40.3%) 736 (31.6%)  
 BMI (kg/m2), mean ± SD 25.38 ± 3.12 24.59 ± 3.16 < 0.001**
 BMI group, n (%)    < 0.001**
  Underweight 19 (0.8%) 27 (1.16%)  
  Normal weight 992 (44.1%) 1268 (54.5%)  
  Overweight 1018 (45.3%) 805 (34.6%)  
  Obese 218 (9.7%) 226 (9.7%)  
Lifestyle, n (%)
 Solitude 42 (1.9%) 45 (1.9%) 0.871
 Reading habits 1450 (64.5%) 1125 (48.4%) < 0.001**
 Physically active 1612 (71.7%) 1712 (73.6%) 0.158
 Current smoker 973 (43.3%) 62 (2.7%) < 0.001**
 Current drinker 1123 (50.0%) 127 (5.5%) < 0.001**
Medical history, n (%)
 Diabetes 372 (16.6%) 281 (12.1%) < 0.001**
 Hypertension 784 (34.9%) 664 (28.5%) < 0.001**
 Hyperlipidemia 476 (21.2%) 494 (21.2%) 0.964
 Stroke 32 (1.4%) 26 (1.1%) 0.355
 Coronary heart disease 203 (9.0%) 140 (6.0%) < 0.001**
 Family history of dementia 160 (7.1%) 204 (8.8%) 0.039*
  1. Data shown as median (interquartile range (IQR)) were compared between two groups using the Mann Whitney U test
  2. Data shown as mean ± standard deviation (SD) were compared between two groups using the Student t test
  3. Data shown as n (%) were compared between two groups using the chi-square test
  4. BMI body mass index
  5. P < 0.05; P < 0.001