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Goulenok, Tiphaine; Vasco, Claire; Faille, Dorothée; Ajzenberg, Nadine; De Raucourt, Emmanuelle; Dupont, Annabelle; Frere, Corinne; James, Chloé; Rabut, Elodie; Rugeri, Lucia; Schleinitz, Nicolas; Sacré, Karim; Papo, Thomas; Barbay, Virginie; Becar, Pierre; Laure Bigel, Marie; Boehlen, Françoise; Darnige, Luc; de Raucourt, Emmanuelle; Dubois, Philippe; Dumas de la Roque, Gerard; Flaujac, Claire; Harlé, Jean‐Robert; James, Chloé; Jourde, Noémie; Khelef, Sabrina; Lacombe, Yves; Langlois, Michel; Lebreton, Aurélien; Leflem, Léna; Mamou, Patrick; Massignon, Denis; Meley, Roland; Michel, Marc; Mutuon, Pierre; Pineau Vincent, Fabienne; Reigner, Antoine; Repesse, Yohann; Rossignol, Benoit; Ryman, Anne; Tieulie, Nathalie; Vasse, Marc; Voisin, Sophie
British journal of haematology, March 2021, 2021-Mar, 2021-03-00, 20210301, 2021-03, Letnik: 192, Številka: 5Journal Article
Summary Acquired factor V inhibitor (AFVI) is an extremely rare disorder that may cause severe bleeding. To identify factors associated with bleeding risk in AFVI patients, a national, multicentre, retrospective study was made including all AFVI patients followed in 21 centres in France between 1988 and 2015. All patients had an isolated factor V (FV) deficiency <50% associated with inhibitor activity. Patients with constitutional FV deficiency and other causes of acquired coagulation FV deficiencies were excluded. The primary outcome was incident bleeding and factors associated with the primary outcome were identified. Thirty‐eight (74 36–100 years, 42·1% females) patients with AFVI were analysed. Bleeding was reported in 18 (47·4%) patients at diagnosis and in three (7·9%) during follow‐up (7 0·2–48.7 months). At diagnosis, FV was <10% in 31 (81·6%) patients. Bleeding at diagnosis was associated with a prolonged prothrombin time that strongly correlated with the AFVI level measured in plasma {r = 0·63, 95% confidence interval (CI) 0·36–0·80, P < 0·05}. Bleeding onset during follow‐up was associated with a slow AFVI clearance (P < 0·001). The corresponding receiver operating characteristics curve showed that AFVI clearance was predictive of bleeding onset with an AFVI clearance of seven months with a sensitivity of 100% (95% CI: 29–100) and a specificity of 86% (95% CI: 57–98, P = 0·02). Kaplan–Meier analysis showed that AFVI clearance >7 months increased the risk of bleeding by 8 (95% CI: 0·67–97, P = 0·075). Prothrombin time at diagnosis and time for clearance of FV inhibitor during follow‐up are both associated with bleeding in patients with AFVI.
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in: SICRIS
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