Truelove and Witts criteria

The modified Truelove and Witts criteria define acute severe ulcerative colitis: six or more bloody stools a day plus at least one sign of systemic toxicity.

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Related resources: IBD

Reference

Truelove SC, Witts LJ. Cortisone in ulcerative colitis: final report on a therapeutic trial. BMJ. 1955;2(4947):1041-1048.