Table 1.

Definitions for each outcome variable

Outcome variable	Definition
Foot‐related conditions 4	Any foot ulcer, foot infection, ischaemia, acute foot wound or amputation procedure present
Foot disease 4, 8	Any foot ulcer, foot infection or ischaemia present
Foot ulcer 8, 9	An existing full‐thickness wound beneath the ankle of primarily neuropathic, ischaemic, pressure injury origin or post‐foot ulcer amputation site
Foot infection 8, 9, 10, 11	At least two manifestations of inflammation (purulence, erythema, pain, tenderness, warmth or induration)
Mild foot infection	A foot infection with erythema extending <2 cm from the edge of the wound
Moderate foot infection	A foot infection with erythema extending >2 cm from the edge of the wound
Severe foot infection	Any foot infection with signs of systemic inflammatory response syndrome
Ischaemia 7, 8, 9	At least one absent foot pulse and a toe systolic pressure <30 mmHg
Acute foot wound 8	An existing full‐thickness wound beneath the ankle of primarily traumatic or post‐surgical origin (excluding amputation procedures because of foot ulcer)
Amputation procedure 12, 13	A new lower‐extremity amputation procedure performed as part of the current inpatient admission, plus a clinical examination to verify a post‐surgical amputation wound site
Minor amputation procedure	An amputation procedure distal to the ankle
Major amputation procedure	An amputation procedure proximal to the ankle