Figure 3.
Progress of pulmonary function tests. Figure 3 shows the data for the pulmonary function tests at diagnosis of ILD, at the baseline visit (V0), at 12 months (V12), and at the final visit (FV): (A) forced vital capacity; (B) forced expiratory volume in the first second, (C) diffusing capacity of the lung for carbon monoxide. The p value for baseline (V0) is the result of comparing values between V0 and the date of diagnosis of ILD. The p value for 12 months (V12) and at the end of follow-up (FV) is the result of the comparison between V12 and FV and baseline (V0). The median (IQR) follow-up time was 27.3 (12.2–42.8) months.