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Table 7 Abnormal ferritin level at entry point (n = 680) and follow-up and its correlation with post-COVID lung fibrosis

From: “Serial ferritin titer” monitoring in COVID-19 pneumonia: valuable inflammatory marker in assessment of severity and predicting early lung fibrosis — prospective, multicentric, observational, and interventional study in tertiary care setting in India

Post-COVID pneumonia fibrosis

Ferritin titer increased/abnormal at entry point (n = 400)

Ferritin titer fourfold increased during follow-up (n = 280)

Analysis

Pulmonary fibrosis present (n = 210)

40

170

Chi test value 198.45 p < 0.00001

Pulmonary fibrosis absent (n = 470)

360

110