Table 3 Odds ratios for different work classes for having a joint replacement

Technicians and clerks

2.0 (0.71 to 5.7)

1.6 (0.85 to 3.0)

0.93 (0.44 to 2.0)

0.74 (0.44 to 1.3)

Service and shop workers

1.5 (0.41 to 5.2)

2.1 (1.0 to 4.2)

1.3 (0.63 to 2.6)

0.79 (0.48 to 1.3)

Farmers

5.1 (2.1 to 12.4)

3.6 (2.1 to 6.2)

1.4 (0.67 to 2.7)

0.62 (0.36 to 1.0)

Fishermen

3.3 (1.3 to 8.4)

1.3 (0.69 to 2.5)

Craft workers

2.5 (1.0 to 6.2)

1.5 (0.87 to 2.7)

1.2 (0.59 to 2.5)

0.66 (0.39 to 1.1)

Operators and unskilled labour

1.4 (0.5 to 3.8)

1.4 (0.78 to 2.6)

1.4 (0.66 to 2.9)

0.60 (0.34 to 1.1)

Housewives

1.2 (0.58 to 2.4)

0.67 (0.40 to 1.1)