Table 1.

Multivariable regression analysis of time in remission and LDAS and quality of life as measured by the summary measures and subscales of the SF-36

SF-36	Number of patients	Estimate	SE	T value	P value
Physical Component Summary Score	456	9.47	1.86	5.10	<0.0001
Physical functioning	472	18.14	4.85	3.74	0.0002
Role physical	466	31.79	6.28	5.06	<0.0001
Bodily pain	469	19.97	4.91	4.07	<0.0001
General health	469	23.15	3.95	5.86	<0.0001
Mental Component Summary Score	456	5.89	1.96	3.01	0.0027
Social functioning	468	19.03	4.78	3.98	<0.0001
Role rmotional	463	26.28	6.37	4.13	<0.0001
Vitality	472	13.39	4.03	3.32	0.0010
Mental health	472	7.51	3.81	1.97	0.0495

Possible confounders were: age, gender, racial/ethnic group, education, poverty, social support, abnormal illness behaviours, fibromyalgia, disease activity, damage and the baseline scores of the corresponding SF-36 summary measures and subscales.

LDAS, low disease activity state; SF-36, Short Form-36.