Table 1 Demographics and occupational characteristics of construction workers

Sex

Male

156 (87.6)

Female

22 (12.4)

Age

under 35

50 (28.1)

35–44

35 (19.7)

45–54

53 (29.8)

55 and over

40 (22.5)

Marital status

Single

126 (70.8)

Married

50 (28.1)

Others

2 (1.1)

Occupation

blue-collar

120 (67.4)

white-collar

58 (32.6)

Job experience (years)

 < 5

37 (20.8)

5 ≤ , < 10

36 (20.2)

10 ≤ , < 15

35 (19.7)

15 ≤ , < 20

31 (17.4)

20 ≤ 

39 (21.9)

Working day per week (day)

5

83 (46.6)

6

42 (23.6)

Process situation

53 (29.8)

Working hours per day

 ≤ 8

91 (51.1)

 ≤ 10

52 (29.2)

10 < 

35 (19.7)