Background:On the current era great emphasis is being given onrnimproving quality of patient care. This motive includes conductingrnclinical study to know procedure and treatment associated outcomernand complication. One of this complication is post anesthesia shiveringrnwhich has deleterious effect several aspects of patient outcomes. Therncause of shivering isincompletely understood. So, it is important tornknow the overall magnitude and major contributing factors for post rnanesthesia shivering for better health care.rnObjective: To assess the magnitude and associated factors of post rnanesthesia shivering inTikur anbesa specialized hospital, Addis Ababa,rnEthiopia from October 01 â€“ November 1, 2019.rnrnMethods: Institutional based cross-sectional study design was conductedrnfrom Oct 01- Nov1, 2019. A systematic random sampling method wasrnemployed to select 160 study subjects. Apre-tested structuredrnquestionnaire was used to collect data. Postoperative axillarytemperaturernwas recorded every 5min for total of 20mintes.rnrnResult: The overall incidence of post-anesthesia shivering was 46.9%.rnFrom this majority ofpatients (52.2%) had grade 3 shivering. In multiple rnlogistic regression analysis, being femalepatient (AOR= 2.003, 95% CI:rn1.038, 3.940; p=0.03), spinal anesthesia (AOR= 2.885, 95% CI: 1.433,rn5.810; P=0.0031) and body temperature less than 360C (AOR= 36.293,rn95% CI: 11.808, 111.554;p=0.001) were considered associated factors ofrnPAS.rnrnConclusion and recommendation:In conclusion therewas overall highrnincidence of PAS, (46.9) which, necessitate close intraoperativerntemperature monitoring and institution of active warming. The relativernhigh incidence of PAS on those patients operated under SA (62.9)