Fig. 6

Forrest plot of the result of univariate analysis for radiological usual interstitial pneumonia (UIP) pattern as a prognostic factor. The result of univariate analysis in three studies was pooled for meta-analysis. Radiological UIP pattern was not significantly associated with all-cause mortality of acute exacerbation (AE) of systemic autoimmune disease-associated interstitial lung disease (ILD) with an odds ratio (OR) of 0.70 (95% confidence interval: 0.24 to 2.08, p = 0.52). There was no heterogeneity (chi² = 0.91, p = 0.64, I² = 0%)