Table 5 Average age-specific incidence of low back pain (LBP) among nurses and reference group in 2004–2010

20–24

60.35

48.79

1.60

2.67–2.97

< 0.001

25–29

56.09

48.34

1.36

1.29–1.44

< 0.001

30–34

52.30

41.83

1.52

1.44–1.61

< 0.001

35–39

57.52

45.03

1.65

1.56–1.75

< 0.001

40–44

57.17

49.00

1.39

1.31–1.47

< 0.001

45–49

59.85

57.76

1.09

1.03–1.15

< 0.01

50–54

60.08

58.43

1.07

1.01–1.13

< 0.05

55–59

50.21

49.23

1.04

0.98–1.10

0.166

≥ 60

56.00

37.33

2.14

2.02–2.26

< 0.001