CREATE TABLE table_test_18 ("id" INT, "bleeding" INT, "dialysis" BOOLEAN, "hct" INT, "hepatic_disease" BOOLEAN, "anaemia" BOOLEAN, "creatinine_clearance_cl" FLOAT, "polycytaemia" BOOLEAN, "thrombocytopenia" FLOAT, "kidney_disease" BOOLEAN, "body_mass_index_bmi" FLOAT, "glycosylated_hemoglobin" FLOAT, "NOUSE" FLOAT)

known severe hepatic impairment
SELECT * FROM table_test_18 WHERE hepatic_disease = 1
SELECT * FROM "table_test_18" WHERE "hepatic_disease" = 1