Inclusion Criteria:  Age > 18 years Patients complaining about abdominal pain Calculated ALVARADO Score 4-7 Whose initial imaging technique was CT  Exclusion Criteria:  Patients diagnosed with other imaging methods (eg, ultrasonography) Patients who underwent surgery without imaging modalities Patients who were followed by medical treatment without surgery Pregnant patients Age <18 Patients with incomplete medical records Patients with additional diseases which can affect the blood parameters (such as underlying hematologic or rheumatologic disease, laignancies, other concurrent infectious diseases) Patients whom were treated with granulocyte colony-stimulating factors, glucocorticoids, or other immunosuppressants that may affect inflammation markers