Recommendations for Collection of Medical History

Recommendation	Class of recommendation	Level of evidence
Obtain clinical history directly from the patient undergoing the procedure	I	C
Collect information in a succinct, objective, and focused manner, considering only the data relevant to the risk stratification algorithm used	IIa	B
In situations where direct data collection from the patient is impossible, obtain the data from relatives, acquaintances, or with the health professional who is accompanying the patient	IIa	C
Do not collect information from the patient's clinical history in the perioperative risk assessment	III	C