Extract
We thank T. Yasuma and co-workers for their valuable comments on our paper describing the association between individual-level long-term concentrations of air pollutants at the residential addresses of patients with idiopathic pulmonary fibrosis (IPF) and mortality among them [1]. We agree that the release of nitrogen dioxide (NO2) or particulate matter in cigarette smoke is one of the considerations in interpreting our results. Thus, we stratified all patients into ever- and non-smokers according to their smoking status and analysed the effect of air pollutants on mortality risk in these patients using our health analysis models that included different sets of confounders (figure 1).
Abstract
The effect of air pollutants on mortality risk in patients with IPF is independent of their smoking status https://bit.ly/3rLUAva
Footnotes
Conflict of interest: H-Y. Yoon has nothing to disclose.
Conflict of interest: S-Y. Kim has nothing to disclose.
Conflict of interest: O-J. Kim has nothing to disclose.
Conflict of interest: J.W. Song has nothing to disclose.
Support statement: This study was supported by a grant from the Basic Science Research Program through the National Research Foundation of Korea, which is funded by the Ministry of Science and Technology (NRF-2019R1A2C2008541). Funding information for this article has been deposited with the Crossref Funder Registry.
- Received June 19, 2021.
- Accepted July 20, 2021.
- Copyright ©The authors 2021. For reproduction rights and permissions contact permissions{at}ersnet.org