Table 1

Demographics

(A) Demographics per diagnosis (patients with multiple diagnoses are included in multiple rows)
Diagnosis	Patients with diagnosis at sample 1	Patients with diagnosis in total follow-up	Female (%)	Mean age ±SD	Number of samples in biobank
Total of all diagnosed patients	1123	1218	63	44.9±16.9	4607
SLE	484	510	86	43.3±14.7	2726
CLE	143	160	85	48.5±16.1	410
APS	124	143	88	43.5±12.0	479
pSS	80	91	89	51.9±15.4	168
RA	68	72	65	44.6±14.0	103
LLD	57	70	93	41.4±15.2	169
MCTD	41	43	83	33.2±16.9	91
IIM	31	31	87	50.2±21.2	42
SSc	30	31	61	50.9±13.6	34
JIA	22	22	100	18.6±5.3	33
PMR	19	19	52	56.8±18.7	21
UCTD	11	13	91	39.4±14.5	20
GPA	7	7	57	46.9±12.5	7
GCA	6	6	33	61.6±13.0	6
No diagnosis	1202	1217	50	45.1±17.5	1324

(B) Demographics per patient group (age is the age at the time the first sample of the patient was collected)
Group	Samples (n)	Female (%)	Mean age±SD
SLE	483	86	43.3±14.7
Non-IMID	218	51	43.9±17.4
Rest	472	46	46.0±17.3
BBD	361*	50	46.7±14.1
IMID	346	78	46.2±17.6

*Sex and age of 2 blood bank donors is unknown.
CLE, cutaneous lupus erythematosus; GCA, giant cell arteritis; GPA, granulomatosis with polyangiitis; IIM, Idiopathic inflammatory myositis; JIA, juvenile idiopathic arthritis; LLD, lupus-like disease; MCTD, mixed connective tissue disease; PMR, polymyalgia rheumatica; pSS, (primary) Sjogren’s syndrome; SSc, systemic sclerosis; UCTD, undifferentiated connective tissue disease.