Illness perceptions in patients receiving rheumatology rehabilitation: association with health and outcomes at 12 months

Table 4 Stepwise regression ^a of discharge scores for NRS fatigue and SF-36 on baseline scores for the RD-IPQ and other variables (n= 97)

Dependent vbl - discharge	Independent vbls - baseline	Regression coefficient	Standard error	t	Significance level	R2^b
NRS^c fatigue	NRS fatigue	0.427	0.104	4.10	.000	0.200
	RD-IPQ ^d	0.034	0.017	2.02	.046	0.234
	(Constant)	1.298	1.032	1.26	.212
SF-36^e role-physical	SF-36 role-physical	0.414	0.098	4.23	.000	0.294
	Inflamm disease	12.499	4.454	2.81	.006	0.359
	RD-IPQ	−0.323	0.157	−2.06	.042	0.387
	(Constant)	46.738	12.038	3.88	.000
SF-36 social function	RD-IPQ	−0.478	0.182	−2.63	.010	0.203
	SF-36 mental health	0.380	0.153	2.49	.015	0.252
	(Constant)	68.303	19.048	3.59	.000
SF-36 role-emotional	SF-36 role-emotional	0.338	0.092	3.68	.000	0.284
	RD-IPQ	−0.500	0.177	−2.82	.000	0.335
	No. yrs diagnosed	−0.954	0.353	−2.70	.008	0.383
	(Constant)	85.571	15.292	5.60	.000
SF-36 mental health	SF-36 mental health	0.787	0.082	9.58	.000	0.481
	MHAQ ^f	−15.465	4.822	−3.21	.002	0.509
	SF-36 role-physical	−0.164	0.069	−2.36	.020	0.537
	(Constant)	30.282	7.118	4.25	.000

^a Variables are listed in the order in which they entered the equations. The results for the analyses with the MHAQ and NRS pain as dependent variables are not shown because only the baseline scores for the same instruments entered the equations.
^b Proportion of variation these variables are able to account for in dependent variable scores.
^c NRS scales are scored from 0–10; 0 is no pain and fatigue,10 is the worst pain and fatigue.
^d RD-IPQ is scored from 0 to 100 where 100 is worst possible illness perceptions.
^e SF-36 is scored from 0 to100 where 100 is the best possible health.
^f MHAQ is scored from 0–3; 3 is the greatest overall disability.

ISSN: 1471-2474