The ADO Index as a Predictor of Two-Year Mortality in General Practice-Based Chronic Obstructive Pulmonary Disease Cohorts

Autor: Andreas Scherr, Jean William Fitting, David Miedinger, Milo A. Puhan, Joerg D. Leuppi, Salome Schafroth Török, Anja Jochmann, Ladina Joos Zellweger, Pierre-Olivier Bridevaux, Thomas Geiser, Nebal Abu Hussein, Sabrina Maier, Robert Thurnheer, Malcolm Kohler, Prashant N Chhajed, Lucia Schoenenberger, Michael Tamm, Lara Siebeling, Gerben ter Riet
Přispěvatelé: University of Zurich, Puhan, Milo A, Amsterdam Public Health, General practice, Amsterdam institute for Infection and Immunity
Rok vydání: 2014
Předmět:
Zdroj: Respiration; international review of thoracic diseases, 88(3), 208-214. S. Karger AG
ISSN: 1423-0356
0025-7931
DOI: 10.1159/000363770
Popis: Background: Existing prediction models for mortality in chronic obstructive pulmonary disease (COPD) patients have not yet been validated in primary care, which is where the majority of patients receive care. Objectives: Our aim was to validate the ADO (age, dyspnoea, airflow obstruction) index as a predictor of 2-year mortality in 2 general practice-based COPD cohorts. Methods: Six hundred and forty-six patients with COPD with GOLD (Global Initiative for Chronic Obstructive Lung Disease) stages I-IV were enrolled by their general practitioners and followed for 2 years. The ADO regression equation was used to predict a 2-year risk of all-cause mortality in each patient and this risk was compared with the observed 2-year mortality. Discrimination and calibration were assessed as well as the strength of association between the 15-point ADO score and the observed 2-year all-cause mortality. Results: Fifty-two (8.1%) patients died during the 2-year follow-up period. Discrimination with the ADO index was excellent with an area under the curve of 0.78 [95% confidence interval (CI) 0.71-0.84]. Overall, the predicted and observed risks matched well and visual inspection revealed no important differences between them across 10 risk classes (p = 0.68). The odds ratio for death per point increase according to the ADO index was 1.50 (95% CI 1.31-1.71). Conclusions: The ADO index showed excellent prediction properties in an out-of-population validation carried out in COPD patients from primary care settings.
Databáze: OpenAIRE