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 |