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Table 1 We used the PEDIS classification system developed by the International Working Group on the Diabetic Foot (IWGDF).The table gives an overview of the PEDIS classification. For more detail, please refer to Schaper (2004) [23]. Additional information about the PEDIS assessment is given in the method section of this study

From: Predicting the amputation risk for patients with diabetic foot ulceration – a Bayesian decision support tool

Grade/ Score Perfusion Extent Depth Infection Sensation
1 No peripheral arterial disease (PAD) <  1 cm2 Superficial No symptoms or sign of infection No loss of protective sensation
2 PAD, No critical limb ischaemia (CLI) 1–5 cm2 Fascia, muscle, tendon Infection involving the skin and the subcutaneous tissue only Loss of protective sensation
3 CLI >  5 cm2 Bone or joint Erythema > 2 cm plus one of: swelling, tenderness, warmth, discharge; or infection involving structures deeper than skin and subcutaneous tissues  
4     Systemic inflammatory response syndrome (SIRS)