Exposure to PM2.5 is a risk factor for acute exacerbation of surgically diagnosed idiopathic pulmonary fibrosis: a case–control study

Table 1 Number of patients diagnosed through MDD in the present study

MDD diagnosis	All	Acute exacerbation	No acute exacerbation
IIPs	352	74	278
IPF	152	41	111
iNSIP	35	6	29
COP	4	0	4
DIP/RB-ILD	7	1	6
iPPFE	15	5	10
Unclassifiable IIPs	139	21	118

Data presented as frequencies. MDD multidisciplinary discussion, IIPs idiopathic interstitial pneumonias, IPF idiopathic pulmonary fibrosis, iNSIP idiopathic nonspecific interstitial pneumonia, COP cryptogenic organizing pneumonia, DIP/RB-ILD desquamative interstitial pneumonia/respiratory bronchiolitis-interstitial lung disease, iPPFE idiopathic pleuroparenchymal fibroelastosis

ISSN: 1465-993X