Fig. 3From: A review of the challenges, learnings and future directions of home handheld spirometry in interstitial lung diseaseLongitudinal correlation of FVC decline over time between home handheld spirometry and site spirometry in a STARLINER, all subjects, b STARLINER, IPF, c STARLINER, non-IPF ILD, d STARMAP, e the pirfenidone in uILD study (placebo group) and f the pirfenidone in uILD study (pirfenidone group). For home handheld spirometry, baseline was calculated as the average of assessments collected during the first 7Â days. FVC forced vital capacity, ILD interstitial lung disease, IPF idiopathic pulmonary fibrosis, uILD unclassifiable interstitial lung diseaseBack to article page