Table 1 General characteristics of subjects at baseline (2006)

Age (years)

<50 (40–49)

42 (53.85 %)

48.7

2.9

≥50

36 (46.15 %)

Working period (years)

20–29

43 (55.13 %)

29.8

2.7

≥30

35 (44.87 %)

Body mass index (BMI) (kg/m²)

<20.0

1 (1.28 %)

23.3

1.8

20.0–22.9

28 (35.90 %)

≥ 23.0

49 (62.82 %)

Systolic blood pressure (mmHg)

<120

17 (21.79 %)

125.9

12.5

120–139

50 (64.10 %)

≥ 140

11 (14.10 %)

Fasting blood sugar (mg/dL)

<100

37 (47.44 %)

102.8

17.7

100–125

36 (46.15 %)

≥ 126

5 (6.41 %)

Total cholesterol (mg/dL)

<200

52 (66.67 %)

189.3

31.2

200–229

19 (24.36 %)

≥ 230

7 (8.97 %)

Smoking status

Non-smoker

64 (82.05 %)

-

-

Smoker

14 (17.95 %)

Noise level (dBA)

< 85 (73.5–84.9)

53 (67.95 %)

83.5

5.0

≥ 85

25 (32.05 %)