Table 3.

Within-person Pearson correlations between slopes of time-integrated disease activity as measured by DAS28-ESR (top diagonal) and CRP (bottom diagonal) and radiographic progression over time

	Baseline–6 months	6 months–1 year	1–2 years	2–3 years
Baseline–6 months	–	0.394***	0.527***	0.592***
6 months–1 year	0.312***	–	0.172*	0.252**
1–2 years	0.643***	0.349***	–	0.478***
2–3 years	0.033	0.048	0.149	–

*P < 0.05; **P < 0.01; ***P < 0.001