Changes in actigraphy metrics associated with PROMIS measures after orthopaedic surgery

Aim: This study examined the feasibility of integrating actigraphy devices into orthopaedic surgical settings to assess the concurrent validity between objective actigraphy data and PROMIS measures. Additionally, the association between changes in actigraphy data and longitudinal changes in PROMIS measures was examined. Methods: Data were collected from 17 participants using actigraphy devices the week prior to and after orthopaedic surgery from 02/2019 to 03/2020. Participants completed PROMIS measures (Physical Function, Sleep Disturbance, Pain Interference) preoperatively and up to 6 months postoperatively. Nonparametric correlations (r_s) assessed for concurrent validity. Linear mixed-effects models examined the association between changes in actigraphy data and PROMIS measures. Results: Prolonged wake after sleep onset was associated with increased sleep disturbances (r_s = 0.49; p = 0.045) and pain interference (r_s = 0.51; p = 0.04). Changes in pain interference were correlated with increased awakenings (r_s = 0.54; p = 0.03). Increased wake after sleep onset was associated with worsening sleep disturbance (β = 0.12; p = 0.01) and pain interference scores over the postoperative period (β = 0.12; p = 0.02). Conclusions: This study is among the first to examine changes in objective actigraphy data and longitudinal PROMIS measures following orthopaedic surgery and illustrates the feasibility of incorporating actigraphy into surgical settings to evaluate postoperative recovery.