Table 1

Variables included in the model		DAS 28 (n=1,582)			Adjusted r-square	CDAI (n=1,563)			Adjusted r-square
		Numbers of variables				Numbers of variables

		Total	>1% prevalence	Final inclusion		Total	>1% prevalence	Final inclusion

All variables	CON + CAT	1275	567	45	0.22	1275	565	54	0.21
	CON only	966	420	30	0.20	966	418	21	0.17
	CAT only	966	420	39	0.22	966	418	56	0.22
Only clinical variables	CON + CAT	253	175	32	0.22	253	173	71	0.24
	CON only	217	149	27	0.22	217	147	65	0.24
	CAT only	217	149	27	0.22	217	147	66	0.23

CON = continuous, CAT = categorical.