Table 3.
Comparison of mortality rates during follow-up by group.
| Mortality in first year of follow-up | Mortality in 10-year follow-up | ||||
|---|---|---|---|---|---|
| Group | Number of persons | Rate per 10 000 person-years | SMR (95% CI) | Rate per 10 000 person-decades | SMR (95% CI) |
| Controls | 40 254 | 244 | 1.00 | 2940 | 1.00 |
| Back | 9259 | 451 | 2.07 (1.87 to 2.28) | 3006 | 1.17 (1.12 to 1.22) |
| Knee | 4170 | 220 | 0.90 (0.72 to 1.10) | 2740 | 0.92 (0.86 to 0.99) |
| Shoulder | 3639 | 310 | 1.42 (1.17 to 1.71) | 2604 | 0.97 (0.90 to 1.05) |
| Neck | 3331 | 230 | 1.13 (0.89 to 1.41) | 2467 | 0.98 (0.91 to 1.06) |
| Hand/wrist | 3293 | 185 | 0.83 (0.64 to 1.07) | 2541 | 0.94 (0.87 to 1.02) |
| Foot | 3119 | 220 | 1.02 (0.79 to 1.30) | 2635 | 1.00 (0.92 to 1.08) |
| Hip | 2084 | 746 | 2.36 (1.99 to 2.77) | 4699 | 1.32 (1.22 to 1.43) |
| All cases | 48 206 | 373 | 1.59 (1.52 to 1.66) | 3079 | 1.11 (1.09 to 1.13) |
SMR = Age- and sex-standardised mortality ratio.