['To evaluate the pre-operative anxiety associated with parental anxiety in children subjected to day surgery, by studying the parent-child behaviour and interaction in the surgical environment.', 'A prospective, observational and cross-sectional study was conducted on 98 paediatric patients, between 2 and 10 years-old, scheduled for elective day surgery with general anaesthesia. The modified YALE Pre-operative Anxiety Scale was applied, and the parents were independently evaluated using the Hamilton Anxiety Test.', 'Pre-operative anxiety was present in 71.4% of the patients. Children between 5 and 7 years had a significantly higher risk of presenting with anxiety (P=.05). In the parents group, 55.2% showed mild anxiety, and 9.2% moderate. The mother was the family member who most often accompanied the paediatric patient.'] Does [ Parental anxiety increase pre-operative anxiety in the paediatric patient subjected to day surgery ]?