Table 2 All DM patients with and without VTE.

	all DM patients: n = 150		P-value
	without VTE: n = 139	with VTE: n = 11	P-value
malignancy	n = 17	n = 1	0.758
infection	n = 22	n = 1	0.551
other CTD	n = 23	n = 3	0.366
cutaneous manifestations	n = 74	n = 4	0.281
age (years)	59.0 (51.0, 70.0)	68.0 (56.5, 76.5)	0.093
D-dimer (μg/mL)	1.28 (0.52, 3.66)	4.24 (2.15, 13.76)	<0.001
CPK (IU/L)	53 (29, 130)	57 (22, 109)	0.519
KL-6 (U/ml)	339 (243, 673)	222 (203, 240)	0.159
PLT (×10⁴/μl)	22.3 (18.0, 29.6)	22.9 (14.2, 26.7)	0.310
PT (s)	11.2 (10.5, 11.7)	11.1 (10.5, 14.1)	0.665
APTT (s)	28.1 (25.4, 29.7)	25.8 (22.5, 30.0)	0.183
CRP (mg/dl)	0.15 (0.04, 0.49)	0.43 (0.03, 1.73)	0.272
LDH (IU/l)	244 (209, 327)	306 (252, 438)	0.032
dose of steroid (prednisolone, mg)	13.0 (5.0, 30.0)	13.0 (9.0, 35.0)	0.632
duration of steroid (years)	0.71 (0.04, 8.5)	0.28 (0.08, 5.2)	0.520
total dose of steroid (prednisolone, mg)	8610 (735, 28695)	6283 (0, 100385)	0.653

DM, dermatomyositis; VTE, venous thromboembolism; CTD, connective tissue disease; CPK, creatine phosphokinase; PLT, platelet; PT, prothrombin time; APTT, activated partial thromboplastin time; CRP, C-reactive protein; LDH, lactate dehydrogenase
Normal values: D-dimer, <1.00; CPK, 59–248; KL-6, 105–435; PLT, 15.8–34.8; PT, 9.8–12.1; APTT, ≤37; CRP, ≤0.14; LDH, 124–222.

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