• Respiratory medicine · Oct 2017

    Blood eosinophilia as a marker of early and late treatment failure in severe acute exacerbations of COPD.

    • Hendrik J Prins, Ruud Duijkers, Rene Lutter, Johannes M Daniels, Paul van der Valk, Margreet Schoorl, Huib A Kerstjens, Tjip S van der Werf, and Wim G Boersma.
    • Department Pulmonary Diseases, Northwest Clinics, Alkmaar, The Netherlands. Electronic address: hjprins1982@hotmail.com.
    • Respir Med. 2017 Oct 1; 131: 118-124.

    BackgroundBlood eosinophilia is frequently encountered in patients with AECOPD. However the impact of blood eosinophilia at admission in patients with AECOPD on outcome on the short and long term has not been extensively studied which was the objective of the present study.MethodsWe used data of 207 exacerbations from a randomized clinical trial on antibiotic prescription based upon CRP-levels versus GOLD guided strategy and analyzed the impact of blood eosinophils (≥2% of total white cell count and eosinophil count ≥300 cell/microliter) on clinical outcome.Results207 patients were included of whom 39 (18·8%) had eosinophilia ≥2%, 23 patients (11.1%) had blood eosinophil ≥300 cell/microliter. Eosinophilia was associated with shorter median length of stay in the eosinophilic groups(≥2% and ≥300 cell/microliter) compared to the non-eosinophilic groups. Early treatment failure was reduced in the both the eosinophilic groups (≥2% and ≥300 cell/microliter). Late treatment failure (day 11-30) did not differ between the groups. Relapse, was more frequent the eosinophilic groups (≥2% and ≥300 cell/microliter), however in the latter group this did not reach statistical significance. Eosinophilia ≥2% was a risk factor for having relapse (eosinophilia ≥2%: HR = 2·351; 95%CI 1·335-4·139), whereas eosinophilia <2% was associated with a lower risk factor for having early treatment failure (HR = 0·339 95%CI 0·122-0·943).ConclusionWe showed that blood eosinophilia at admission in patients with an AECOPD is associated with higher short-term treatment success rate. However, blood eosinophilia ≥2% predicts a less favorable outcome due to an increased risk of relapse.Clinical Trial RegistrationNCT01232140.Copyright © 2017. Published by Elsevier Ltd.

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