Table 6 Presenting odds ratios (OR) and 95% confidence intervals (95% CI) for CWP 18 years later. Model A includes age, gender, mental health, socio economy and number of sleep problems

 0

1

1

1

1

 1

1.82 (1.00–3.34)

1.73 (0.93–3.20)

1.57 (0.84–2.95)

1.57 (0.83–2.96)

 2

1.38 (0.65–2.91)

1.27 (0.59–2.71)

1.03 (0.48–2.22)

1.02 (0.47–2.23)

 3

2.44 (1.19–5.00)*

2.17 (1.03–4.56)*

1.78 (0.84–3.80)

1.75 (0.81–3.82)

 4

3.95 (1.90–8.20)**

3.33 (1.55–7.13)**

2.36 (1.06–5.23)*

2.29 (1.01–5.18)*

 Low

1

1

 Intermediate

0.96 (0.51–1.79)

0.89 (0.47–1.67)

 High

1.79 (0.89–3.60)

1.13 (0.54–2.37)

 0

1

1

 1–2

2.83 (1.57–5.12)**

2.76 (1.52–5.02)**

 3–5

4.03 (2.20–7.37)**

3.84 (2.05–7.20)**

 > 6

8.63 (3.05–24.43)**

8.24 (2.88–23.63)**

 Good

1

1

1

1

 Intermediate

1.22 (0.67–2.25)

1.15 (0.61–2.18)

1.21 (0.65–2.24)

1.21 (0.63–2.31)

 Poor

1.75 (0.92–3.13)

1.25 (0.59–2.66)

1.36 (0.70–2.63)

1.27 (0.59–2.72)

 High non-manual

1

1

1

1

 Ass non-manual

1.22 (0.61–2.47)

1.25 (0.62–2.54)

1.21 (0.58–2.49)

1.22 (0.59–2.53)

 Manual

1.49 (0.90–2.48)

1.50 (0.90–2.51)

1.40 (0.83–2.38)

1.41 (0.83–2.38)

 other

1.24 (0.56–2.77)

1.26 (0.56–2.83)

1.29 (0.56–3.00)

1.31 (0.56–3.04)