TABLE 1.

Study population demographics

Characteristic	n (%), n=209	95% CI*
Age, mean ± SD, years	67±18
Sex
Male	125 (59.8)	53.1–66.5
Female	84 (40.2)	33.5–47.2
BUN, mean ± SD, mmol/L	13.4±9.4
ICU admission	111 (53.1)	46.3–60.0
Blood transfusion	98 (45.1)	46.8–61.5
ICU admission and blood transfusion	67 (32.1)	25.7–38.4
Neither ICU admission nor blood transfusion	45 (21.5)	15.9–27.2
Endoscopic high-risk lesion	78 (37.3)	30.7–43.9

^*95% CIs are reported for the percentage of patients for each characteristic. BUN Blood urea nitrogen; ICU Intensive care unit