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Table 1 Sample Characteristics at Baseline

From: The association between frailty and incidence of dementia in Beijing: findings from 10/66 dementia research group population-based cohort study

Demographic
Variables
Total
N = 2022
Urban
N = 977
Rural
N = 948
t/χ2P
N%N%N%
Gender      0.50.49
 Female113055.960956.652155.1  
 Male89244.146743.442544.9  
Age      34.7<.001
 65–6968633.930928.737739.9  
 70–7463531.435032.528530.1  
 75–7941920.723621.918319.3  
 80–841829.011811.0646.8  
 85+1005.0635.9373.9  
 Mean72.80 73.47 72.05 5.499*<.001
 25th percentile68 69 68   
 50th percentile72 73 71   
 75th percentile76 77 75   
Education level      473.6< 0.001
 None74837.020719.254157.2  
 Minimal/completed primary78138.642339.335837.8  
 Completed secondary/metric35817.731629.4424.4  
 Completed tertiary/college/further education1356.713012.150.5  
Marital status      49.0<.001
 Unmarried251.230.3222.3  
 Married/co-habiting134266.478072.556259.4  
 Widowed/divorced/separated65532.429327.236238.3  
Alcohol use status      106.8<.001
 No drinking180389.2103195.877281.6  
 Temperance291.490.8202.1  
 Drinking1909.4363.415416.3  
Smoking status      63.4<.001
 No smoking144971.781775.963266.8  
 Smoking cessation1025.0767.1262.8  
 Smoking47123.318317.028830.4  
  1. N Number of participants
  2. * The difference of age between the two sites was compared by means and t-test
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