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@article{1423307,
author = {Brat, Kristián and Plutinský, Marek and Hejduk, Karel and Svoboda, Michal and Popelkova, Patrice and Zatloukal, Jaromir and Volakova, Eva and Pecaninova, Miroslava and Heribanova, Lucie and Koblizek, Vladimir},
article_location = {Auckland},
article_number = {2018},
doi = {http://dx.doi.org/10.2147/COPD.S147262},
keywords = {COPD; GOLD 2017 update; Hypercapnia; Hypoxemia; Mortality},
language = {eng},
issn = {1178-2005},
journal = {INTERNATIONAL JOURNAL OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE},
title = {Respiratory parameters predict poor outcome in COPD patients, category GOLD 2017 B},
volume = {13},
year = {2018}
}
TY - JOUR
ID - 1423307
AU - Brat, Kristián - Plutinský, Marek - Hejduk, Karel - Svoboda, Michal - Popelkova, Patrice - Zatloukal, Jaromir - Volakova, Eva - Pecaninova, Miroslava - Heribanova, Lucie - Koblizek, Vladimir
PY - 2018
TI - Respiratory parameters predict poor outcome in COPD patients, category GOLD 2017 B
JF - INTERNATIONAL JOURNAL OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE
VL - 13
IS - 2018
SP - 1037-1052
EP - 1037-1052
PB - Dove Medical Press Ltd.
SN - 11782005
KW - COPD
KW - GOLD 2017 update
KW - Hypercapnia
KW - Hypoxemia
KW - Mortality
N2 - Background: Respiratory parameters are important predictors of prognosis in the COPD population. Global Initiative for Obstructive Lung Disease (GOLD) 2017 Update resulted in a vertical shift of patients across COPD categories, with category B being the most populous and clinically heterogeneous. The aim of our study was to investigate whether respiratory parameters might be associated with increased all-cause mortality within GOLD category B patients. Methods: The data were extracted from the Czech Multicentre Research Database, a prospective, noninterventional multicenter study of COPD patients. Kaplan–Meier survival analyses were performed at different levels of respiratory parameters (partial pressure of oxygen in arterial blood [PaO2], partial pressure of arterial carbon dioxide [PaCO2] and greatest decrease of basal peripheral capillary oxygen saturation during 6-minute walking test [6-MWT]). Univariate analyses using the Cox proportional hazard model and multivariate analyses were used to identify risk factors for mortality in hypoxemic and hypercapnic individuals with COPD. Results: All-cause mortality in the cohort at 3 years of prospective follow-up reached 18.4%. Chronic hypoxemia (PaO2<7.3 kPa), hypercapnia (PaCO2>7.0 kPa) and oxygen desaturation during the 6-MWT were predictors of long-term mortality in COPD patients with forced expiratory volume in 1 second #60% for the overall cohort and for GOLD B category patients. Univariate analyses confirmed the association among decreased oxemia (<7.3 kPa), increased capnemia (>7.0 kPa), oxygen desaturation during 6-MWT and mortality in the studied groups of COPD subjects. Multivariate analysis identified PaO2<7.3 kPa as a strong independent risk factor for mortality. Conclusion: Survival analyses showed significantly increased all-cause mortality in hypoxemic and hypercapnic GOLD B subjects. More important, PaO2<7.3 kPa was the strongest risk factor, especially in category B patients. In contrast, the majority of the tested respiratory parameters did not show a difference in mortality in the GOLD category D cohort.
ER -
BRAT, Kristián, Marek PLUTINSKÝ, Karel HEJDUK, Michal SVOBODA, Patrice POPELKOVA, Jaromir ZATLOUKAL, Eva VOLAKOVA, Miroslava PECANINOVA, Lucie HERIBANOVA and Vladimir KOBLIZEK. Respiratory parameters predict poor outcome in COPD patients, category GOLD 2017 B. \textit{INTERNATIONAL JOURNAL OF CHRONIC OBSTRUCTIVE PULMONARY DISEASE}. Auckland: Dove Medical Press Ltd., vol.~13, No~2018, p.~1037-1052. ISSN~1178-2005. doi:10.2147/COPD.S147262. 2018.
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