Table 3 Covariate associations with transition probabilities
Covariate | OR (95% CI) |
|---|---|
Year (reference: 2001–2004) | |
Effect on transition from low to moderate/severe disease | |
2005–2006 | 0.865 (0.700 to 1.068) |
2007–2008 | 0.593 (0.471 to 0.746) |
2009–2010 | 0.583 (0.474 to 0.716) |
2011–2012 | 0.615 (0.506 to 0.748) |
2013–2014 | 0.605 (0.497 to 0.735) |
Effect on transition from moderate/severe to moderate/severe disease | |
2005–2006 | 1.055 (0.853 to 1.304) |
2007–2008 | 0.911 (0.733 to 1.133) |
2009–2010 | 0.824 (0.679 to 0.999) |
2011–2012 | 0.888 (0.740 to 1.066) |
2013–2014 | 1.004 (0.837 to 1.205) |
Duration of RA (reference: 0 to 3 years) | |
Effect on transition from low to moderate/severe disease | |
3 to 10 years | 0.777 (0.698 to 0.865) |
>10 years | 0.840 (0.752 to 0.939) |
Effect on transition from moderate/severe to moderate/severe disease | |
3 to 10 years | 1.167 (1.045 to 1.303) |
>10 years | 1.379 (1.236 to 1.539) |
Age (reference: <50 years)a | |
50 to 64 years | 1.176 (1.082 to 1.279) |
≥65 years | 1.024 (0.939 to 1.117) |
Visit interval (reference: 3 to < 4 months) | |
Effect on transition from low to moderate/severe disease | |
4 to <5 months | 1.057 (0.940 to 1.187) |
5 to <6 months | 1.085 (0.961 to 1.226) |
6 to <7 months | 1.201 (1.057 to 1.364) |
7 to <8 months | 1.349 (1.160 to 1.568) |
8 to 9 months | 1.171 (0.977 to 1.403) |
Effect on transition from moderate/severe to moderate/severe disease | |
4 to <5 months | 0.931 (0.831 to 1.042) |
5 to <6 months | 0.801 (0.712 to 0.902) |
6 to <7 months | 0.779 (0.686 to 0.886) |
7 to <8 months | 0.799 (0.683 to 0.935) |
8 to 9 months | 0.866 (0.729 to 1.028) |