THE EFFECT OF LIFESTYLE ON THE PROGRESS OF COVID 19 INFECTIONThe development of COVID 19 disease depends on the interaction with the immunity of thehost. The immune response of the host is related to age, gender, nutrition, sleep andphysical activity. Our study in Fatih Sultan Mehmet Training and Research Hospital;Between 31 January-31 May 2021,positive COVID 19 PCR test was performed with 66 patientsover the age of 50, who received inpatient treatment. Demographic data of the patients,length of hospitalization, alcohol/tobacco use, BMI, comorbidities, regular usemedication or not, thorax CT findings, place of discharge after treatment, laboratoryparameters were recorded at hospitalization and discharge.To evaluate the pre-infection lifestyle; physical activity, nutrition and sleep habitswere questioned.According to the PSQS (Pittsburg Sleep Quality Scale) although the increase in dischargedlymphocyte measurements compared to the first hospitalization of the patients in the goodand bad sleep groups was significant, there was no significant difference between thegroups. In the evaluation between the groups, the increase in the NLR value at the firsthospitalization was significant in the bad sleep group compared to the good sleep group.There was no difference between the groups in terms of NLR.According to the MNA(Mini Nutritional Assessment)scale ;the increase in the dischargelymphocyte value of the groups compared to the value at the first hospitalization wassignificant. The increases in the discharge lymphocyte measurements of the patientscompared to the first hospitalization were significant between the groups (p