Table 1 Baseline characteristics of the study subjects according to the type of educational levels.

From: Association between education and the risk of incident coronary heart disease among middle-aged and older Chinese: the Dongfeng-Tongji Cohort

Variables

Low education (≤8 years)

High education (≥9 years)

P

Sample size, n

12264

6287

<0.01

Mean age, year

63.29 ± 7.28

61.80 ± 8.30

<0.01

Male, n (%)

5253 (42.83)

2911 (46.30)

<0.01

Married, n (%)

10942 (89.43)

5754 (91.71)

<0.01

BMI, kg/m2

24.54 ± 3.44

24.00 ± 3.20

<0.01

Waist circumference, cm

83.34 ± 9.47

81.56 ± 9.22

<0.01

Married, n (%)

10942 (89.43)

5754 (91.71)

<0.01

Current Smokers, n (%)

2443 (20.04)

1011 (16.21)

<0.01

Current alcohol drinker, n (%)

2877 (23.49)

1291 (20.55)

<0.01

Physical activity, n (%)

10834 (88.34)

5647 (89.82)

<0.01

Fruit and vegetable intake, n (%)

 Fruit (≥1 time/day)

6253 (50.99)

3865 (61.48)

<0.01

 Vegetable (≥1 time/day)

11674 (95.19)

6002 (95.47)

0.21

Stress, n (%)

5459 (44.51)

2822 (44.89)

0.32

Overweight, n (%)

6726 (54.86)

3011 (47.92)

<0.01

Hypertension, n (%)

6095 (49.70)

2717 (43.22)

<0.01

Hyperlipidemia, n (%)

5607 (45.72)

2950 (46.92)

0.06

Diabetes, n (%)

2112 (17.22)

908 (14.44)

<0.01

Family history of CHD, n (%)

234 (2.72)

492 (7.83)

<0.01

  1. Abbreviation: CHD, coronary heart disease; BMI, body mass index.
  2. Data are mean ± standard deviation for continuous variables and number (%) for categorical variables.
  3. P values were calculated using student’s t-test for continuous variables and chi-square test for categorical variables.
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