• Gregory L Bryson, Natalie A Clavel, Rebecca Moga, Barbara Power, Monica Taljaard, and Howard J Nathan.
• Department of Anesthesiology, The Ottawa Hospital, 1053 Carling Avenue, Box 249C, Ottawa, ON, K1Y 4E9, Canada. glbryson@ottawahospital.on.ca
• Can J Anaesth. 2013 Sep 1;60(9):864-73.

PurposeThe primary objective of this prospective cohort study was to assess the impact of ambulatory surgery on patient function one week and one month following surgery among surgical patients ≥ 65 yr of age. Secondary objectives were to determine whether changes in patient function were correlated with increased burden of care in the patient's primary caregiver and with patient assessments of postoperative pain and quality of life.MethodsFollowing Research Ethics Board approval, patients aged ≥ 65 yr undergoing elective ambulatory surgery and their caregivers were recruited. Patients completed the système de mesure de l'autonomie fonctionnelle (SMAF) and the Brief Pain Inventory. Primary caregivers completed the Zarit Burden Interview (ZBI). All measurements were obtained preoperatively and on postoperative days (POD) 7 and 30.ResultsPatient function decreased on POD 7 and had not returned to baseline on POD 30 (mean change in SMAF 6.9; 95% confidence interval (CI) 5.3 to 8.4 on POD 7 and mean change in SMAF 2.6; 95% CI 1.3 to 4.0 on POD 30). Interval changes in caregiver burden were not significant (mean change in ZBI -0.4; 95% CI -1.8 to 0.96 on POD 7 and mean change in ZBI -0.6; 95% CI -2.1 to 0.8 on POD 30). Decreased patient function was associated with increased caregiver burden at all time points (P < 0.001). Decreased caregiver function at baseline was also associated with higher ZBI (linear association 0.71; P = 0.02).ConclusionsPatients exhibited reduced function seven days following ambulatory surgery. Patient function largely recovered by POD 30. Caregiver burden was variable and influenced by both patient and caregiver function. This trial was registered with Clinical Trials.gov (NCT01382251).

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