Observational studyBritish journal of anaesthesia2026
Differential associations between preoperative anaemia and postoperative outcomes in women and men undergoing surgery
Observational study in British journal of anaesthesia, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
0 citing papers in PubMed.
No citing paper in PubMed yet.
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
Abstract
backgroundPreoperative anaemia is associated with adverse surgical outcomes, yet it is unclear whether anaemia-outcome relationships are consistent for women and men.
methodsThis observational cohort study was conducted between August 1, 2012 and July 31, 2022 in adults undergoing surgery requiring postoperative hospitalisation at a large academic medical centre in the USA. Anaemia was defined as haemoglobin <12 g dl
resultsOf 228 341 procedures (49.4% among women) included, AKI occurred in 13.2% overall, with a lower rate in women (7.6% in women vs 18.8% in men). Preoperative anaemia was present in 70 968 (31.1%) patients, including 30.8% of women and 31.4% of men. In adjusted analyses, increasing severity of preoperative anaemia was associated with worse outcomes. When comparing severe preoperative anaemia to no anaemia, the adjusted odds ratio (OR) for AKI was 2.91 (95% confidence interval: 2.47, 3.44) in women vs 1.43 (1.22, 1.68) in men. Corresponding ORs were 2.48 (2.14, 2.88) vs 1.62 (1.40, 1.86) for ischaemic events, and 4.78 (3.94, 5.80) vs 2.62 (2.13, 3.23) for surgical site infection. Interaction testing confirmed stronger associations in women for AKI, ischaemic events, and surgical site infection (all interaction P<0.001).
conclusionsPreoperative anaemia is associated with adverse outcomes in both women and men, though the associations with acute kidney injury, ischaemic events and surgical site infection are stronger in women.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.