Fig. 1: Structured data collection form encompassing variables from the Ottawa ankle rules (Table 1), the Leiden ankle rule (Table 2) and other variables from the history and physical examination. Pallor = a noticeable difference in skin colour compared with the contralateral side; pulseless or weakened posterior tibial artery = a marked difference from the contralateral side; pain on axial compression = pain when plantar pressure is applied on the heel in the direction of the knee. [The form is a translation of a Dutch original.]