Table 2 Relative risk of hip and knee replacement by body mass index at around age 60 years cross-classified by birth weight, and body size at age 10 and 20 years

1.00 (0.95–1.05)

1.00 (0.94–1.06)

1.37 (1.29–1.44)

2.65 (2.52–2.78)

1.80 (1.63–1.99)

6.49 (6.08–6.94)

1.25 (1.20–1.30)

1.10 (1.05–1.16)

1.60 (1.54–1.66)

2.61 (2.51–2.71)

2.06 (1.93–2.20)

6.18 (5.90–6.48)

1.61 (1.54–1.69)

1.43 (1.34–1.53)

2.00 (1.93–2.07)

3.23 (3.12–3.35)

2.52 (2.42–2.62)

6.96 (6.76–7.18)

1.00 (0.96–1.04)

1.00 (0.95–1.06)

1.38 (1.32–1.44)

2.64 (2.54–2.74)

1.75 (1.64–1.87)

6.15 (5.89–6.42)

1.10 (1.07–1.14)

0.90 (0.86–0.95)

1.52 (1.48–1.57)

2.26 (2.19–2.33)

2.03 (1.94–2.12)

5.35 (5.17–5.53)

1.29 (1.20–1.39)

0.87 (0.78–0.97)

1.67 (1.57–1.77)

2.08 (1.95–2.22)

2.40 (2.26–2.54)

5.25 (5.00–5.50)

1.00 (0.91–1.10)

1.00 (0.89–1.13)

1.30 (1.19–1.41)

2.62 (2.42–2.84)

2.04 (1.84–2.26)

6.01 (5.57–6.49)

0.96 (0.92–1.01)

0.93 (0.88–0.99)

1.31 (1.26–1.37)

2.42 (2.32–2.52)

1.86 (1.75–1.97)

5.55 (5.31–5.80)

0.92 (0.87–0.98)

0.85 (0.78–0.92)

1.31 (1.24–1.38)

2.28 (2.16–2.41)

1.79 (1.67–1.91)

5.56 (5.29–5.85)