Acute exacerbations of fibrosing interstitial lung disease associated with connective tissue diseases: a population-based study

Table 3 Bivariate correlation analysis between clinical variables and overall survival time

Clinical Variables	AE-IPF group		AE-CTD-fILD group
Clinical Variables	r	p value	r	p value
WBC count (× 10⁹)	−0.277	0.004	−0.323	0.006
LDH (U/L)	−0.220	0.023	−0.296	0.013
PaO2/FiO2 ratio	0.158	0.104	0.407	< 0.001
CT score	−0.433	< 0.001	−0.252	0.035
Maximal dosage of methylprednisolone (mg/d)	−0.196	0.043	−0.146	0.227

WBC: white blood cell; LDH: lactate dehydrogenase; PaO2/FiO2 ratio: Oxygenation index; HRCT: high resolution computed tomography; MV: mechanical ventilation

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