Table 2 Mean values of heart rate variability by general characteristics

Age (year)

 20-29

45.63 (14.94)*

39.41 (19.80)*

6.02 (0.75)*

5.71 (0.96)*

1.94 (1.74)

 30-39

42.72 (15.41)

33.64 (16.43)

5.90 (0.95)

5.40 (1.05)

2.72 (3.59)

 40-49

34.89 (12.50)

26.03 (14.05)

5.34 (0.90)

4.80 (1.07)

2.66 (3.43)

 50-59

27.64 (11.05)

19.66 (7.73)

4.77 (0.92)

4.35 (0.95)

2.34 (2.38)

Department

 Administrative job

36.49 (12.43)

26.54 (11.60)*

5.54 (0.88)

5.01 (0.92)

2.60 (2.92)

 Non-Administrative job

38.50 (15.18)

30.11 (16.54)

5.59 (0.99)

5.07 (1.14)

2.66 (3.49)

Shift work

  No

35.87 (12.79)

25.78 (11.11)*

5.50 (0.93)

4.96 (0.91)

2.39 (2.30)

  Yes

38.58 (15.01)

30.17 (16.46)

5.61 (0.97)

5.08 (1.13)

2.70 (3.57)

Smoking

  No

37.62 (14.79)

28.69 (15.31)*

5.54 (0.98)*

5.02 (1.10)

2.63 (3.18)

  Yes

39.87 (14.03)

31.96 (16.92)

5.73 (0.91)

5.21 (1.07)

2.71 (4.05)

Alcohol

  No

35.87 (13.28)*

27.66 (13.75)*

5.39 (0.96)*

4.94 (1.04)

2.40 (3.39)

  Yes

39.31 (15.24)

30.30 (16.62)

5.68 (0.95)

5.12 (1.12)

2.78 (3.36)

Marital status

  Unmarried

42.82 (14.88)*

34.67 (17.58)*

5.96 (0.85)*

5.43 (1.07)*

2.68 (3.72)

  Married

36.96 (14.39)

28.10 (14.96)

5.49 (0.97)

4.97 (1.08)

2.64 (3.29)

Exercise (times/week)

   ≥ 3

38.07 (15.68)

29.52 (16.96)

5.55 (0.98)

5.02 (1.13)

2.56 (2.50)

   < 3

38.09 (13.70)

29.20 (14.50)

5.60 (0.95)

5.09 (1.06)

2.72 (3.99)

BMI

   < 25

38.20 (14.08)

29.71 (14.91)

5.60 (0.95)

5.09 (1.07)

2.59 (3.21)

   ≥ 25

37.90 (15.49)

28.83 (16.80)

5.55 (0.98)

5.00 (1.13)

2.73 (3.61)