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  • Title: Adrenomedullin refines mortality prediction by the BODE index in COPD: the "BODE-A" index.
    Author: Stolz D, Kostikas K, Blasi F, Boersma W, Milenkovic B, Lacoma A, Louis R, Aerts JG, Welte T, Torres A, Rohde GG, Boeck L, Rakic J, Scherr A, Hertel S, Giersdorf S, Tamm M.
    Journal: Eur Respir J; 2014 Feb; 43(2):397-408. PubMed ID: 23794469.
    Abstract:
    The BODE (body mass index, airflow obstruction, dyspnoea, exercise capacity) index is well-validated for mortality prediction in chronic obstructive pulmonary disease (COPD). Concentrations of plasma pro-adrenomedullin, a surrogate for mature adrenomedullin, independently predicted 2-year mortality among inpatients with COPD exacerbation. We compared accuracy of initial pro-adrenomedullin level, BODE and BODE components, alone or combined, in predicting 1-year or 2-year all-cause mortality in a multicentre, multinational observational cohort with stable, moderate to very severe COPD. Pro-adrenomedullin was significantly associated (p<0.001) with 1-year mortality (4.7%) and 2-year mortality (7.8%) and comparably predictive to BODE regarding both (C statistics 0.691 versus 0.745 and 0.635 versus 0.679, respectively). Relative to using BODE alone, adding pro-adrenomedullin significantly improved 1-year and 2-year mortality prognostication (C statistics 0.750 and 0.818, respectively; both p<0.001). Pro-adrenomedullin plus BOD was more predictive than the original BODE including 6-min walk distance. In multivariable analysis, pro-adrenomedullin (likelihood ratio Chi-squared 13.0, p<0.001), body mass index (8.5, p=0.004) and 6-min walk distance (7.5, p=0.006) independently foretold 2-year survival, but modified Medical Research Council dyspnoea score (2.2, p=0.14) and forced expiratory volume in 1 s % predicted (0.3, p=0.60) did not. Pro-adrenomedullin plus BODE better predicts mortality in COPD patients than does BODE alone; pro-adrenomedullin may substitute for 6-min walk distance in BODE when 6-min walk testing is unavailable.
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