Hazard ratio (HR) and 95% confidence intervals (CI) adjusted for sex, residential area, year of diagnosis, and age. Overall and stratified by calendar period of RA diagnosis and time since RA diagnosis
| RA duration categories HR (95% CI) | |||||
|---|---|---|---|---|---|
| Calendar period of RA diagnosis | Total follow-up | <1 year | 1-<5 years | 5–10 years | >10 years |
| Total study period | 1.01 (0.96–1.06) | 0.57 (0.48–0.67) | 0.90 (0.83–0.97) | 1.11 (1.02–1.20) | 1.43 (1.28–1.59) |
| 1997–2001 | 1.09 (1.01–1.18) | 0.58 (0.39–0.87) | 0.81 (0.68–0.96) | 1.06 (0.92–1.21) | 1.41 (1.25–1.60) |
| 2002–2006 | 1.02 (0.94–1.10) | 0.37 (0.24–0.57) | 0.88 (0.76–1.01) | 1.15 (1.03–1.30) | 1.48 (1.20–1.82) |
| 2007–2011 | 0.95 (0.86–1.05) | 0.65 (0.49–0.87) | 0.98 (0.86–1.11) | 1.09 (0.90–1.31) | – |
| 2012–2015 | 0.77 (0.63–0.95) | 0.63 (0.46–0.88) | 0.87 (0.67–1.12) | – | – |