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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

From: Changes in the incidence of occupational disability as a result of back and neck pain in the Netherlands

Men < 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 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