CRP and lymphopenia: In the univariate analysis, age (OR, 1.067; CI, 1.038–1.098; P < .001), hypertension (OR, 3.570; CI, 1.666–7.650; P = .001), cancer (OR, 15.105; CI, 1.795–127.147; P = .012), fever at diagnosis (OR, 3.450; CI, 1.587–7.500; P = .002), dyspnea at diagnosis (OR, 29.625; CI, 9.211–95.279; P < 0.001), lymphopenia (OR, 3.824; CI, 1.667–8.771; P = .002), CRP level (OR, 1.448; CI, 1.219–1.719; P < .001), and positivity on initial CT (OR, 3.679; CI, 1.396–9.697; P = .008) were associated with the need for O2 therapy.