@article{swarbrick2025-40425394,
  author  = {Swarbrick, Claire Jane and Blake, Helen Abigail and Martin, Peter and Partridge, Judith S.L. and Moppett, Iain Keith},
  title   = {{Directed acyclic graphs to minimise bias and optimise causal inference in SNAP-3: an observational cohort study of frailty, multimorbidity, and delirium in older surgical patients}},
  journal = {British Journal of Anaesthesia},
  year    = {2025},
  doi     = {10.1016/j.bja.2025.04.027},
  pmid    = {40425394},
  url     = {https://doi.org/10.1016/j.bja.2025.04.027}
}