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Table 2 Duration of illness (DOI) at entry point during hospitalization and ferritin level in COVID-19 pneumonia cases (n = 1000)

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

Duration of illness

Normal ferritin (n = 320)

Abnormal ferritin (n = 680)

Analysis

< 7 days (n = 340)

30

310

Chi test value 185.65 p < 0.00001

8–15 days (n = 460)

160

300

> 15 days (n = 200)

130

70