Hemodynamics, fluids & transfusion

Preoperative moderate to severe anemia is associated with increased postoperative major adverse cardiac and cerebral events and pulmonary complications: a propensity score-matched analysis in hip fracture surgery patients over 80 years old

Perioper Med (Lond)Published Retrospective cohort study

Authors' conclusion

Moderate to severe preoperative anemia (< 11 g/dl) is associated with increased postoperative major adverse cardiac and cerebral events and pulmonary complications.

Study context

Population
Patients over 80 years old undergoing hip fracture surgery512 in matched cohort
Participants
912 participants
Exposure
Preoperative moderate to severe anemia vs normal to mild anemia
  • Moderate to severe anemian = 591
  • Normal to mild anemian = 321reference
Outcome
MACCE and postoperative pulmonary complications (PPCs)
Methodological detailspropensity score matching
  • Propensity score matching

Main finding

As reported in the abstract

Moderate to severe anemia vs Normal to mild anemiaORP value
MACCE, unadjusted
1.968(96% CI 1.090–3.555)
P 0.023
MACCE, adjusted
1.929(95% CI 1.014–3.668)
P 0.045
PPCs, unadjusted
2.616(95% CI 1.442–4.748)
P 0.001
PPCs, adjusted
2.352(95% CI 1.225–4.516)
P 0.010
PPCs, propensity score-matched
3.171(95% CI 1.563–6.436)
P 0.001
Major adverse cardiac and cerebral events (MACCE), propensity score-matched; CI misprinted in abstract
OR 2.196; P 0.027

Observational data: associations, not effects.

Further findings

In-hospital mortality

In-hospital mortality

Not significant but higher in the moderate to severe anemia cohort

Perioperative transfusion > 2 units

Not significantly different between the two cohorts (unadjusted)
OR 0.967, 95% CI 0.737-1.270, P 0.811
Not significantly different between the two cohorts (adjusted)
OR 0.941, 95% CI 0.693-1.278, P 0.697

Delirium, gastrointestinal complication, ICU admission, deep venous thrombus (DVT)

Similar between cohorts

Original publication

Preoperative moderate to severe anemia is associated with increased postoperative major adverse cardiac and cerebral events and pulmonary complications: a propensity score-matched analysis in hip fracture surgery patients over 80 years old. Perioper Med (Lond). Published 10 November 2023. doi:10.1186/s13741-023-00349-5

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