Table 1.

ICD-10 diagnoses of thrombosis in children (0–18 years of age) recorded in the Danish National Patient Registry (DNPR) during the period 1994–2006

Thrombosis localization		ICD-10 diagnosis codes	Number of first-time diagnoses recorded in the DNPR n (%)
Venous	Cerebral sinovenous Retinal veins Pulmonary embolism Vena cava, renal veins, hepatoportal veins Deep veins of extremities Venous thrombosis in relation to pregnancy	I67.6, I63.6, G0.8 H34.8 I26 I81–I82 I80.1–I80.9 O22.5A, O87.3, O22.3, O22.8–9, O87A–F, O87.1	57 (5.0) 4 (0.4) 105 (9.2) 103 (9.1) 391 (34.4) 0
Arterial	Ischemic stroke Retinal arteries Arteries of extremities and/or aorta Renal arteries Myocardial infarction	I63–I64 H34.1–H34.2 I74 N28.0A, N28.0D I21	364 (32.0) 4 (0.4) 61 (5.4) 0 42 (3.7)
Miscellaneous (combined arterial and venous)	Mesenterial Retinal	K55.0H, K55.0C H34, H34.9	0 7 (0.6)
All			1138 (100)