Age- and sex-adjusted SMR (CI) for the UCD when AS was an NUCD.
| Variables | 2000–2009 | |
|---|---|---|
| SMR (CI) | p | |
| Infectious diseases | 2.1 (1.46–2.91) | < 0.001 |
| Neoplasm | 0.43 (0.36–0.51) | < 0.001 |
| Disease of circulatory system | 1.06 (0.93–1.21) | 0.35 |
| Disease of respiratory system | 1.66 (1.31–2.06) | < 0.001 |
| External cause | 1.91 (1.57–2.29) | < 0.001 |
SMR: standard mortality ratio; UCD: underlying cause of death; AS: ankylosing spondylitis; NUCD: nonunderlying cause of death.