COVID-19(15) Patient(13) Result(11) Infection(9) risk(8) SARS-CoV-2(7) smoking(6) lung(6) ICU(6) positive(6) association(6) effective(5) predictor(5) COVID-19 patient(5) Critical(5) Treatment(5) pandemic(5) outcome(5) Care(5) severity(5) Health(5) Radiographic(5) hospital(4) diagnosing(4) the patient(4) radiological(4) RT-PCR(4) disorders(4) evaluated(4) pulmonary(4)