Table 3 Occupational factors associated with lower limbs varicose veins (LLVV)

Employment status

 Never employed

32

21.3

34

22.7

1.08 (0.62, 1.86)

0.78

 Ever employed (currently/previously)

118

78.7

116

77.3

Among ever employed

 Duration of employment (years)

  Min-max

  Mean± SD

0.99 (0.98, 1.01)

0.60

 ISCO classification^#

  Professionals^{^}

3

2.5

22

19.0

1

 Technicians and associated professionals

24

20.3

43

37.1

0.27 (0.01, 4.00)

0.34

  Service and sales workers

10

8.5

21

18.1

1.11 (0.09, 12.96)

0.93

  Skilled agricultural and fishery workers

3

2.5

2

1.7

0.95 (0.07, 11.78)

0.97

  Craft and related trade workers

32

27.1

8

6.9

3.00 (0.15, 59.89)

0.47

  Plant and machine operators

45

38.1

18

15.5

8.00 (0.64, 99.66)

0.10

  Elementary occupations

1

0.8

2

1.7

5.00 (0.42, 58.63)

0.20

 Working hours/day^#

  Working > 8 h/day

47

39.8

22

19.0

>0.001***

  Working ≤ 8 h/day^{^}

71

60.2

94

81.0

 Working hours/week^#

  Working > 48 h/week

47

39.8

24

20.7

2.53 (1.41, 4.53)

>0.01**

  Working ≤ 48 h/week^{^}

71

60.2

92

79.3

 Work time^#

  Day work^{^}

75

63.6

115

99.1

65.93 (8.8, 489.1)

0.001**

  Shift work

43

36.4

1

0.9

 Nature of work^#

  Blue/pink collar

91

77.1

53

45.7

4.00 (2.28, 7.04)

>0.001***

  White collar^{^}

27

22.9

63

54.3

 Posture at work^#

  Standing

66

55.9

18

15.5

6.91 (3.71, 12.84)

>0.001***

  Sitting^{^}

52

44.1

98

84.5

 Sitting hours/working day^#

  Sitting ≤ 4 h/ working day

65

55.1

21

18.1

5.54 (3.05, 10.06)

>0.001***

  Sitting < 4 h/ working day^{^}

53

44.9

95

81.9

 Standing hours/working day^#

  Standing <4 h/working day

64

54.2

18

15.5

6.45 (3.47, 11.98)

>0.001***

  Standing >4 h/working day^{^}

54

45.8

98

84.5

 Lifting heavy objects (hours/working day)^#

  ≥ 2 h/working day

7

5.9

1

0.9

7.25 (0.87, 59.90)

0.06

  < 2 h/working day^{^}

111

94.1

115

99.1