Table 3 Incidence rate ratios for occupational disability as a result of back disorders, dividing incidence rates for the period 1999–2000 by those for 1980–1985; adj IRR = for age differences adjusted incidence rate ratio, 95%CI = 95% confidence interval

Categories of disorders

M40–43 Deforming dorsopathies

M40–43 Kyphosis and other dorsopathies

0.44

0.88

1.22

1.18

1.59

1.10

1.05

0.98–1.11

M45–49 Spondylopathies

M45–46 Inflammatory dorsopathies

0.48

0.59

0.47

0.59

0.71

0.62

0.56

0.50–0.62

M47–49 Spondylosis and other spondylopathies

0.61

0.59

0.51

0.35

0.42

0.45

0.41

0.40–0.43

M50–54 Other dorsopathies

M50–51 Disorders of the intervertebral disc

0.31

0.61

0.60

0.49

0.53

0.62

0.55

0.53–0.56

M53 Other dorsopathies

6.97

7.78

3.55

1.97

3.30

3.37

2.96

2.71–3.23

M54 Dorsalgia

0.49

0.74

0.74

0.52

0.51

0.69

0.61

0.59–0.63

M54.2 Cervicalgia

2.46

1.81

1.28

0.44

0.29

0.67

0.60

0.55–0.66

M 96.1 Postlaminectomy syndrome

2.05

2.02

1.73

1.74

2.32

2.12

1.85

1.62–2.14

All back disorders

0.48

0.75

0.73

0.54

0.59

0.70

0.63

0.62–0.64

All disorders (incl. non-back disorders)

1.19

0.96

0.80

0.75

0.74

0.88

0.82

0.81–0.82

Women

< 25 y

25–34 y

35–44 y

44–55 y

>55 y

tot IRR

adj IRR

95% CI

Categories of disorders

M40–43 Deforming dorsopathies

M40–43 Kyphosis and other deformities

1.03

1.61

1.73

1.40

1.54

1.59

1.45

1.32–1.60

M45–49 Spondylopathies

M45–46 Inflammatory dorsopathies

1.15

1.06

0.78

1.07

1.09

1.20

0.99

0.80–1.21

M47–49 Spondylosis and other spondyopathies

1.39

1.41

0.69

0.45

0.42

0.70

0.52

0.48–0.56

M50–54 Other dorsopathies

M50–51 Disorders of the intervertebral disc

0.85

0.91

0.62

0.51

0.49

0.83

0.61

0.58–0.63

M53 Other dorsopathies

3.68

4.49

2.17

1.76

2.59

3.23

2.36

2.12–2.69

M54 Dorsalgia

1.30

1.47

0.88

0.44

0.63

1.02

0.79

0.76–0.82

M54.2 Cervicalgia

4.63

2.76

1.12

0.53

0.46

1.28

0.95

0.84–1.06

M 96.1 Postlaminectomy syndrome

1.82

2.52

1.89

2.39

1.82

2.81

2.13

1.64–2.77

All back disorders

1.25

1.42

0.85

0.56

0.63

1.05

0.79

0.78–0.81

All disorders (incl. non-back disorders)

1.70

1.96

1.45

1.04

0.83

1.63

1.34

1.33–1.35