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Impact of high‐risk thrombophilia status on recurrence among children with a first non‐central‐venous‐catheter‐associated VTE: an observational multicentre cohort study
Author(s) -
Limperger Verena,
Kenet Gili,
Goldenberg Neil A.,
Heller Christine,
Holzhauer Susanne,
Junker Ralf,
Klostermeier Ulrich C.,
Knoefler Ralf,
Kurnik Karin,
Krümpel Anne,
Mesters Rolf,
Stach Michael,
Young Guy,
NowakGöttl Ulrike
Publication year - 2016
Publication title -
british journal of haematology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.907
H-Index - 186
eISSN - 1365-2141
pISSN - 0007-1048
DOI - 10.1111/bjh.14192
Subject(s) - medicine , thrombophilia , observational study , venous thromboembolism , central venous catheter , cohort , cohort study , pediatrics , catheter , surgery , thrombosis
Summary Deficiency of antithrombin ( AT ), protein C ( PC ) or protein S ( PS ) constitutes a major risk factor for venous thromboembolism ( VTE ). Individuals at high risk for recurrence who benefit from screening need to be identified. The primary study objective was to determine the individual recurrence risk among children with a first non‐central‐venous‐catheter‐associated VTE with respect to their thrombophilia status and to evaluate if the clinical presentation at first VTE onset differs between children with AT , PC or PS deficiency versus no thrombophilia. We calculated the absolute risk of VTE recurrence and event‐free‐survival adjusted for thrombophilia, age, sex and positive family VTE history in 161 consecutively enrolled paediatric VTE patients. The presence of a deficiency relative to no thrombophilia was evaluated as a potential predictor of recurrence. Predictors for recurrence were AT deficiency (hazard ratio/95% CI : 6·5/2·46–17·2) and female gender (2·6/1·1–6·35). The annual recurrence rates (95% CI s) were 5·4% (2·6–10) in AT ‐deficient children, 1·3% (0·3–3·8) in patients with PC deficiency, 0·7% (0·08–2·4) in the PS ‐deficient cohort and 0·9% (0·4–1·8) in patients with no thrombophilia. Positive family VTE history or combined thrombophilias did not predict recurrence. Given the overall annual incidence rate of recurrence of 1·5% we suggest screening for AT deficiency in children with VTE .