Fig. 1

Area under receiver operating curve for risk of persistent chest radiograph abnormality using the ‘SHADE-750’5-point risk stratification score. (A) SHADE-750 score (1-point each for; Smoking history (Ever vs. Never), Higher-level care (level 2 or 3 care admission), Age ≥ 50 years, Duration of admission ≥ 15 days and Enzyme-lactate dehydrogenase [LDH] ≥ 750U/L). (B) Present study cohort (2nd Wave cohort) n = 147 with available data for score, of which persistent CXR abnormality n = 46 and complete resolution n = 101, (C) Previous study 1st Wave cohort (Wave 1) n = 66 with available data for score, of which persistent CXR abnormality n = 23 and complete resolution n = 43, (D) Present study and previous study cohorts combined (Wave 1 and 2) n = 213 with available data for score, of which persistent CXR abnormality n = 69 and complete resolution n = 144