The authors regret typographical errors in Table 1. The number of men with ankylosing spondylitis was 8193 (65.8%). All values in the table should be positive numbers.
TABLE 1.
Baseline characteristics of Medicare beneficiaries with ankylosing spondylitis, inflammatory bowel disease, and unaffected controls.
| Ankylosing Spondylitis (N = 12,451) | Inflammatory Bowel Disease (N =234,905) | Controls (N = 10,975,340) | |
|---|---|---|---|
| Age at entry, years | 65 | 65 | 65 |
| Men (%) | 8193 (65.8) | 99,009 (42.1) | 5,337,533 (48.5) |
| White (%) | 11,282 (90.6) | 216,035 (92.0) | 9,262,099 (84.4) |
| Black (%) | 501 (4.0) | 12,073 (5.1) | 1.031,114 (9.4) |
| Other (%) | 668 (5.4) | 6797 (2.9) | 682,127 (6.2) |
| Years of follow up, mean ± standard deviation | 9.9 ± 3.8 | 9.3 ± 3.8 | 8.0 ± 4.1 |
| Total person-years | 123,414 | 2,183,223 | 87,495,843 |
The authors would like to apologise for any inconvenience caused.