Glasgow-Blatchford score

• Blood urea (mmol/L)
  < 6.506.5 – <8.028.0 – <10.0310.0 – <25.04≥ 25.06
• Haemoglobin (g/L)
  Men ≥130 / Women ≥1200Men 120 – <1301Women 100 – <1201Men 100 – <1203Men or women < 1006
• Systolic BP (mmHg)
  ≥ 1100100–109190–992< 903
• Pulse ≥ 100 /min+1
• Melaena+1
• Presented with syncope+2
• Hepatic disease+2
• Cardiac failure+2

Source: NICE CG141 — Acute upper GI bleeding in over 16s

For healthcare professionals, as an aid to clinical judgement — not a substitute for it. Follow your local policy and ask a senior when in doubt.