GSTM1 and diabetes mellitus: In the derivation cohort, 19 clinical variables were significantly associated with safe discharge on univariate analysis: female gender, prior LGITB admission, absence of diabetes, absence of ischemic heart disease, absence of liver disease, no antiplatelet usage, absence of DRE findings of blood, presence of abdominal tenderness, absence of syncope or dizziness, lower Charlson score, higher SBP and DBP at triage, lower HR at triage, higher initial Hb levels, lower platelet count, lower INR levels, higher APTT levels, lower urea and creatinine levels, and higher bicarbonate levels (Table 2).