Table 1.
Number of patients with hip arthroplasty according to type of implant and age at operation and number of person years
| Age (years) | Metal-on-metal cohort | Non-metal-on-metal cohort* | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Men | Women | Men | Women | ||||||||
| No of people | Person years | No of people | Person years | No of people | Person years | No of people | Person years | ||||
| 0-9 | 1 | 1 | — | — | — | — | — | — | |||
| 10-19 | 5 | 12 | 3 | 15 | — | — | — | — | |||
| 20-29 | 25 | 86 | 16 | 49 | 4 | 15 | 7 | 20 | |||
| 30-39 | 158 | 385 | 67 | 210 | 30 | 95 | 20 | 74 | |||
| 40-49 | 741 | 2399 | 468 | 1326 | 143 | 562 | 157 | 449 | |||
| 50-59 | 2275 | 7144 | 1642 | 5236 | 850 | 3076 | 922 | 3383 | |||
| 60-69 | 2257 | 9293 | 1581 | 6431 | 2261 | 9983 | 2739 | 11 076 | |||
| 70-79 | 762 | 3240 | 594 | 2287 | 3044 | 16 530 | 5394 | 25 719 | |||
| ≥80 | 65 | 254 | 48 | 208 | 697 | 6153 | 1954 | 16 071 | |||
| Total | 6289 | 22 813 | 4419 | 15 764 | 7029 | 36 413 | 11 193 | 56 792 | |||
*Metal-on-polyethylene, ceramic-on-polyethylene, and ceramic-on-ceramic bearing surfaces.