Fig. 2From: Borderline pulmonary hypertension is associated with exercise intolerance and increased risk for acute exacerbation in patients with interstitial lung diseaseKaplan-Meier analysis for the onset of acute exacerbation of ILD according to the 3-groups of ILD patients. *Significant difference between No-PH and PH: p = 0.023. **Significant difference between No-PH and Bo-PH: p < 0.001. Definition of abbreviations: ILD, interstitial lung disease; PH, pulmonary hypertensionBack to article page