Table 4 Individual and lifestyle factors of LBP among OMPWF with univariate analysis

Age

  < 25

48

41

85.4

0.839

0.657

 25~

90

81

90.0

 30~

13

12

92.3

Working-age

  < 1

27

24

88.9

0.194

0.907

 1~

64

56

87.5

 3~

60

54

90.0

Weight (kg)

  < 60

31

27

87.1

0.856

0.652

 60~

60

55

91.7

 70~

60

52

86.7

Height (cm)

  < 170

53

48

90.6

3.949

0.139

 170~

49

40

81.6

 175~

49

46

93.9

Physical exercise

 yes

38

34

89.5

0.027

1.000

 no

113

100

88.5

Smoking

 Yes

57

51

89.5

0.049

1.000

 No

94

83

88.3

Drinking

 Yes

130

114

87.7

1.030

0.469

 No

21

20

95.2

Using the computer time during your spare time(h)

  < 1

17

17

100

11.926

0.008

 1~

32

26

81.2

 2~

51

50

98.0

 3~

51

41

80.4

The height of chair(cm)

  < 35

17

15

88.2

0.086

0.958

  > 50

21

19

90.5

 35–50

111

98

88.3

The height of desk (cm)

  < 50

76

68

89.5

9.691

0.008

  > 72

50

48

96.0

 50–72

25

18

72.0

Legroom underneath the desk

 Yes

111

96

86.5

1.906

0.240

 No

38

36

94.7

Whether the keyboard and mouse at the same height

 Yes

137

120

87.6

1.681

0.362

 No

12

12

100.0

Backrest

 Yes

45

36

80.0

3.610

0.069

 No

46

43

93.5