Fig. 1
From: Validation of a derived version of the IPF-specific Saint George’s Respiratory Questionnaire
Bland–Altman plot of the agreement between SGRQ-Ider and SGRQ-I. The solid line represents the mean difference and dashed lines represent 95% limits of agreement. SGRQ-Ider: IPF-specific version of the St. George’s Respiratory Questionnaire derived from results from the original St. George’s Respiratory Questionnaire; SGRQ-I: IPF-specific version of the St. George’s Respiratory Questionnaire