variable

mean value

Standard error

minimum value

Maximum value

Years of Education

12.436 (8.858)

3.358 (4.321)

9 (5)

19 (19)

Occupation grade

6.19 (4.328)

2.983 (3.080)

1 (1)

12 (12)

BMI index

22.832 (22.510)

3.558 (3.646)

15.564 (14.458)

37.197 (42.969)

Age

27.290 (33.708)

4.099 (11.428)

18 (18)

35 (44)