Postoperative delirium after hip surgery is a potential risk factor for incident dementia: A systematic review and meta-analysis of prospective studies.
Level 3 - non-randomized controlled study
Systematic review and meta-analysis of prospective cohort studies
PubMed 31751902 · doi:10.1016/j.archger.2019.103977
What was done
The authors conducted a systematic review and pairwise meta-analysis of prospective cohort studies retrieved from PubMed, Embase, and the Cochrane Library. The analysis evaluated whether postoperative delirium after hip surgery is a risk factor for incident dementia using fixed- and random-effects models.
What was found
Across 6 prospective cohort studies, postoperative delirium significantly increased the risk of incident dementia and cognitive decline (fixed-effects OR = 8.957, 95% CI 5.444-14.737, P < 0.001; random-effects OR = 8.962, 95% CI 5.344-15.029, P < 0.001). Publication bias was reported as not evident.
Why it matters
This review links postoperative delirium after hip surgery to an elevated risk of subsequent dementia, highlighting the need for routine cognitive monitoring and targeted preventive strategies in at-risk surgical patients.
Limits
The meta-analysis included only 6 prospective studies, and total participant counts were not reported in the abstract. As an analysis of observational cohorts, unmeasured confounding and reverse causality cannot be entirely excluded based on abstract data.
Cited by
- supports Patients who develop delirium are three times more likely to subsequently develop dementia.