CRP and acute respiratory distress syndrome: Multiple logistic regression analysis showed that older age (age ≥ 60; odds ratio: 4.6; P = 0.035), area of pulmonary infiltration on a chest X-ray (pulmonary infiltration ≥ 22%; odds ratio: 3.5; P = 0.023), and elevated CRP (CRP ≥ 5 mg/dL, odds ratio: 10.7; P = 0.007) were independent risk factors for prediction of ARDS in patients with COVID-19.