Table 3.

Mean ± standard deviation for SF-36 subscales and summary scales for the study population, cross-classified by presence of flares in the preceding year and severity or manifestations of flares.

			No. of Flares		Severity		Organ System		Manifestations
	Without Flare, n = 242	With Flares, n = 61	One Flare, n = 50	Two Flares, n = 11	Mild/moderate, n = 18	Severe, n = 32	Single Organ, n = 53	Multiorgan, n = 8	Renal/NP, n = 26	Musculoskeletal, n = 8	Other, n = 19
Subscales
Physical function	73 ± 26	66 ± 30	65 ± 30	59 ± 31	64 ± 25	66 ± 32	68 ± 28	52 ± 40	68 ± 33	48 ± 26*	74 ± 14
Role limitation due to physical problems	55 ± 44	31 ± 38††	34 ± 39	20 ± 31	39 ± 40	30 ± 40	32 ± 39	25 ± 35	30 ± 39	28 ± 36	37 ± 40
Bodily pain	65 ± 25	58 ± 28	59 ± 27	53 ± 35	50 ± 28	65 ± 25	56 ± 28	70 ± 29	60 ± 27	30 ± 16*	63 ± 28
General health	41 ± 22	35 ± 20†	35 ± 21	32 ± 20	34 ± 18	36 ± 22	35 ± 21	32 ± 18	34 ± 23	27 ± 13	41 ± 19
Vitality	50 ± 20	47 ± 23	49 ± 22	38 ± 23	45 ± 22	52 ± 22	47 ± 23	49 ± 19	46 ± 26	39 ± 21	52 ± 19
Social function	73 ± 24	64 ± 26†	65 ± 26	59 ± 26	61 ± 28	68 ± 26	65 ± 26	58 ± 30	65 ± 26	44 ± 24*	74 ± 22
Role limitation due to emotional problems	59 ± 44	45 ± 45†	46 ± 46	39 ± 42	43 ± 47	48 ± 46	43 ± 45	54 ± 47	38 ± 46	25 ± 39	58 ± 46
Mental health	64 ± 19	62 ± 20	63 ± 19	55 ± 20	60 ± 21	65 ± 19	62 ± 21	63 ± 14	60 ± 22	53 ± 18	68 ± 19
Summary scales
Physical health summary	45 ± 9	41 ± 9†	41 ± 9	40 ± 11	40 ± 9	41 ± 9	41 ± 9	38 ± 8	42 ± 10	34 ± 7*	43 ± 8
Mental health summary	44 + 11	42 ± 12	43 ± 12	38 ± 13	41 ± 12	44 ± 13	42 ± 12	44 ± 13	43 ± 12	36 ± 9	46 ± 11

↵† p < 0.05;
↵†† p < 0.005, significant differences between patients with and without flares.
↵* p < 0.05, significant difference between patients with musculoskeletal flares and other flares. NP: neuropsychiatric.