The Power of a Study That Was Underpowered

Dr. Mark Neuman and Dr. Sam Falkson join the show to discuss the literature around risks of regional versus general anesthesia for postoperative delirium. Dr. Neuman is the founding Director of the Center for Perioperative Outcomes Research and Transformation and Professor of Anesthesiology at Penn Medicine. Dr. Sam Falkson is an anesthesia resident at the Massachusetts General Hospital.

This podcast was recorded as part of the Depth of Anesthesia podcast elective.

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Music by Stephen Campbell, MD.

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References

Guay J, Parker MJ, Gajendragadkar PR, Kopp S. Anaesthesia for hip fracture surgery in adults. Cochrane Database Syst Rev. 2016;2(2):CD000521.

Ravi B, Pincus D, Choi S, Jenkinson R, Wasserstein DN, Redelmeier DA. Association of duration of surgery with postoperative delirium among patients receiving hip fracture repair. JAMA Netw Open. 2019;2(2):e190111.

Patel V, Champaneria R, Dretzke J, Yeung J. Effect of regional versus general anaesthesia on postoperative delirium in elderly patients undergoing surgery for hip fracture: a systematic review. BMJ Open. 2018;8(12):e020757.

Zheng X, Tan Y, Gao Y, Liu Z. Comparative efficacy of Neuraxial and general anesthesia for hip fracture surgery: a meta-analysis of randomized clinical trials. BMC Anesthesiol. 2020 Jun 30;20(1):162.

Neuman MD, Feng R, Carson JL, et al. Spinal anesthesia or general anesthesia for hip surgery in older adults. N Engl J Med. 2021;385(22):2025-2035.

Rathmell JP, Avidan MS. Patient-centered outcomes after general and spinal anesthesia. N Engl J Med. 2021 Nov 25;385(22):2088–9.

Stone AB, Poeran J, Memtsoudis SG. There remains a role for neuraxial anesthesia for hip fracture surgery in the post-REGAIN era. Reg Anesth Pain Med. 2023 Aug;48(8):430-432. doi: 10.1136/rapm-2022-104071. Epub 2023 Mar 28. PMID: 36977527.

Li T, Li J, Yuan L, et al. Effect of regional vs general anesthesia on incidence of postoperative delirium in older patients undergoing hip fracture surgery: the raga randomized trial. JAMA. 2022;327(1):50-58.